A 3D radiative transfer framework: VI. PHOENIX/3D example applications (2009)
Hauschildt, Peter H., Baron, E.
We demonstrate the application of our 3D radiative transfer framework in the model atmosphere code PHOENIX/3D for a number of spectrum synthesis calculations for very different conditions. The 3DRT...
On the Hydrogen Recombination Time in Type II Supernova Atmospheres (2009)
De, Soma, Baron, E., Hauschildt, P. H.
NLTE radiative transfer calculations of differentially expanding supernovae atmospheres are computationally intensive and are almost universally performed in time-independent snapshot mode. The...
Knop, S., Hauschildt, P. H., Baron, E.
A solution of the radiative-transfer problem in arbitrary velocity fields introduced in a previous paper, has limitations in its applicability. For large-scale applications, the methods described...
3D Radiative Transfer with PHOENIX (2009)
Baron, E., Chen, Bin, Hauschildt, P. H.
Using the methods of general relativity Lindquist derived the radiative transfer equation that is correct to all orders in v/c. Mihalas developed a method of solution for the important case of...
Time-dependent radiative transfer with PHOENIX (2009)
Jack, D., Hauschildt, P. H., Baron, E.
Aims. We present first results and tests of a time-dependent extension to the general purpose model atmosphere code PHOENIX. We aim to produce light curves and spectra of hydro models for all types...
A 3D radiative transfer framework: V. Homologous Flows (2009)
Baron, E., Hauschildt, Peter H., Chen, Bin
Observations and theoretical calculations have shown the importance of non-spherically symmetric structures in supernovae. Thus, the interpretation of observed supernova spectra requires the ability...
Type Ia supernova science 2010-2020 (2009)
Howell, D. A., Conley, A., Della Valle, M., Nugent, P. E., Perlmutter, S., Marion, G. H., ...
In the next decade Type Ia supernovae (SNe Ia) will be used to test theories predicting changes in the Dark Energy equation of state with time. Ultimately this requires a dedicated space mission like...
Analyzing SN2003Z with PHOENIX (2009)
Knop, S., Hauschildt, P. H., Baron, E., Dreizler, S.
We present synthetic spectra around maximum for the type II supernova SN 2003Z, which was first detected on January 29.7 2003. Comparison with observed spectra aim at the determination of physical...
A new formal solution of the radiative transfer in arbitrary velocity fields (2009)
Knop, S., Hauschildt, P. H., Baron, E.
We present a new formal solution of the Lagrangian equation of radiative transfer that is useful in solving the equation of radiative transfer in the presence of arbitrary velocity fields. Normally a...
Branch, David, Dang, Leeann Chau, Baron, E.
A comparative study of optical spectra of Type Ia supernovae (SNe Ia) is extended, in the light of new data. The discussion is framed in terms of the four groups defined in previous papers of this...
Worthey, G., Dotter, A., Chaboyer, B., Jevremovic, D., Baron, E., ...
The first paper in this series explored the effects of altering the chemical mixture of the stellar population on an element by element basis on stellar evolutionary tracks and isochrones to the end...
Gal-Yam, A., Bufano, F., Barlow, T. A., Baron, E., Benetti, S., Cappellaro, E., ...
We present the initial results from our GALEX program designed to obtain ultraviolet (UV) spectra of nearby core-collapse supernovae (SNe). Our first target, SN 2005ay in the nearby galaxy NGC 3938,...
Gal-Yam, A., Bufano, F., Barlow, T. A., Baron, E., Benetti, S., Cappellaro, E., ...
We present the initial results from our GALEX program designed to obtain ultraviolet (UV) spectra of nearby core-collapse supernovae (SNe). Our first target, SN 2005ay in the nearby galaxy NGC 3938,...
A 3D radiative transfer framework: III. periodic boundary conditions (2008)
Hauschildt, Peter H., Baron, E.
We present a general method to solve radiative transfer problems including scattering in the continuum as well as in lines in 3D configurations with periodic boundary conditions. he scattering...
GALEX Spectroscopy of SN 2005ay suggests a UV spectral uniformity among type II-P supernovae (2008)
Gal-Yam, A., Bufano, F., Barlow, T., Baron, E., Benetti, S., Cappellaro, E., ...
We present the first results from our GALEX program designed to obtain ultraviolet (UV) spectroscopy of nearby core-collapse supernovae (SNe). Our first target, SN 2005ay in the nearby galaxy NGC...
Multi-layered Spectral Formation in SNe Ia Around Maximum Light (2008)
Bongard, S., Baron, E., Smadja, G., Branch, D., Hauschildt, P. H.
We use the radiative transfer code PHOENIX to study the line formation of the wavelength region 5000-7000 Angstroms. This is the region where the SNe Ia defining Si II feature occurs. This region is...
The Dartmouth Stellar Evolution Database (2008)
Dotter, Aaron, Chaboyer, Brian, Jevremovic, Darko, Kostov, Veselin, Baron, E., Ferguson, J. W.
The ever-expanding depth and quality of photometric and spectroscopic observations of stellar populations increase the need for theoretical models in regions of age-composition parameter space that...
Evidence for a Spectroscopic Sequence Among SNe Ia (2008)
Peter Nugent, Mark Phillips, E. Baron, David Branch, Peter Hauschildt
In this Letter we present evidence for a spectral sequence among Type Ia supernovae (SNe Ia). The sequence is based on the systematic variation of several features seen in the near-maximum light...
A Self-Consistent NLTE-Spectra Synthesis Model of FeLoBAL QSOs (2008)
Casebeer, Darrin, Baron, E., Leighly, Karen, Jevremovic, Darko, Branch, David
We present detailed radiative transfer spectral synthesis models for the Iron Low Ionization Broad Absorption Line (FeLoBAL) active galactic nuclei (AGN) FIRST J121442.3+280329 and ISO...
Comparative Direct Analysis of Type Ia Supernova Spectra. IV. Postmaximum (2007)
Branch, David, Jeffery, David J., Parrent, Jerod, Baron, E., Troxel, M. A., Stanishev, V., ...
A comparative study of optical spectra of Type Ia supernovae (SNe Ia) obtained near 1 week, 3 weeks, and 3 months after maximum light is presented. Most members of the four groups that were defined...
Peter Nugent, E. Baron, David Branch, Adam Fisher, Peter H. Hauschildt
We present detailed NLTE synthetic spectra of hydrodynamic SNe Ia models. We make no assumptions about the form of the spectrum at the inner boundary. We calculate both Chandrasekhar-mass...
Nlte Modeling Of Sne Ia Near Maximum Light (2007)
Baron Dept, E. Baron, P. H. Hauschildt, A. Mezzacappa
. Modeling the atmospheres of SNe Ia requires the solution of the NLTE radiative transfer equation. We discuss the formulation of the radiative transfer equation in the co-moving frame. For...
Radiative Transfer in the Co-Moving Frame (2007)
Baron Hauschildt, E. Baron, P. H. Hauschildt
We discuss the formulation of the radiative transfer equation in the co-moving frame. For characteristic velocities larger than ¸ 2000 km s \Gamma1 , the effects of advection on the synthetic...
NLTE Effects in Modeling of Supernovae near Maximum (2007)
E. Baron, P. H. Hauschildt, P. Nugent, D. Branch
Supernovae, with their diversity of compositions, velocities, envelope masses, and interactions are good testing grounds for probing the importance of NLTE in expanding
Metallicity Effects in NLTE Model Atmospheres of Type Ia Supernovae (2007)
Eric Lentz Baron, Eric J. Lentz, E. Baron, David Branch, Peter H. Hauschildt, Peter E. Nugent
We have calculated a grid of photospheric phase atmospheres of Type Ia supernovae (SNe Ia) with metallicities from ten times to one thirtieth the solar metallicity in the C+O layer of the...
Direct Analysis of Spectra of the Type Ic Supernova 1994I (2007)
Jennifer Millard, David Branch, E. Baron, Adam Fisher, A. V. Filippenko, R. P. Kirshner, ...
Synthetic spectra generated by the parameterized supernova synthetic-- spectrum code SYNOW are compared to observed photospheric--phase spectra of the Type Ic supernova 1994I. The observed optical...
David Branch, W. Romanishin, E. Baron
Statistical connections between the properties of Type Ia supernovae (SNe Ia) and the B--V colors of their parent galaxies are established. Compared to SNe Ia in blue galaxies [(B \Gamma V ) o T ¸...
Peter Nugent, Mark Phillips, E. Baron, David Branch, Peter Hauschildt, Ni Produced
In this Letter we present evidence for a spectral sequence among Type Ia supernovae (SNe Ia). The sequence is based on the systematic variation of several features seen in the near-maximum light...
Peter Nugent, E. Baron, Peter H. Hauschildt, David Branch
We present NLTE synthetic spectra for the Type Ia supernovae SN 1992A and SN 1981B, near maximum light. At this epoch both supernovae were observed from the UV through the optical. This wide spectral...
ON VAN DEN BERGH'S METHOD FOR MEASURING THE HUBBLE CONSTANT FROM TYPE IA SUPERNOVAE (2007)
David Branch, Adam Fisher, E. Baron, Peter Nugent
In a recent Letter, van den Bergh used explosion--model light--curve calculations of Hoflich & Khokhlov to calibrate the Hamuy et al. sample of remote Type Ia supernovae (SNe Ia), and obtained...
Peter Nugent, E. Baron, David Branch, Adam Fisher, Peter H. Hauschildt
We present detailed NLTE synthetic spectra of hydrodynamic SNe Ia models. We make no assumptions about the form of the spectrum at the inner boundary. We calculate both Chandrasekhar-mass...
Spectral Models of the Type Ic SN 1994I in M51 (2007)
E. Baron, David Branch, Peter H. Hauschildt, R. P. Kirshner
We present detailed non-local thermodynamic equilibrium (NLTE) synthetic spectra for comparison with a time series of observed optical spectra of the Type Ic supernova 1994I which occurred in M51....
P. H. Hauschildt, E. Baron, Peter Nugent, David Branch, Cepheid Variable Stars
Abstract. We present NLTE synthetic spectra for the Type Ia supernovae SN 1992A SN 1981B, and SN 1991bg near maximum light. At this epoch both of the normal SNe Ia (SNe 1981b and 1992A) were observed...
Detailed Spectral Modeling of a 3-D Pulsating Reverse Detonation Model: Too Much Nickel (2007)
Baron, E., Jeffery, David J., Branch, David, Bravo, Eduardo, Garcia-Senz, Domingo, Hauschildt, Peter H.
We calculate detailed NLTE synthetic spectra of a Pulsating Reverse Detonation (PRD) model, a novel explosion mechanism for Type Ia supernovae. While the hydro models are calculated in 3-D, the...
A Study of the Type Ia/IIn Supernova 2005gj from X-ray to the Infrared: Paper I (2007)
Prieto, J. L., Garnavich, P. M., Phillips, M. M., DePoy, D. L., Parrent, J., Pooley, D., ...
We present extensive ugrizYHJK photometry and optical spectroscopy of SN 2005gj obtained by the SDSS-II and CSP Supernova Projects, which give excellent coverage during the first 150 days after the...
Dotter, A., Chaboyer, B., Ferguson, J. W., Worthey, G., Baron, E., ...
Integrated light from distant galaxies is often compared to stellar population models via the equivalent widths of spectral features--spectral indices--whose strengths rely on the abundances of one...
Dotter, A., Chaboyer, B., Jevremovic, D., Baron, E., Ferguson, J. W., Sarajedini, A., ...
The ACS Survey of Galactic Globular Clusters, an HST Treasury Project, will deliver high quality, homogeneous photometry of 65 globular clusters. This paper introduces a new collection of stellar...
Comparative Direct Analysis of Type Ia Supernova Spectra. III. Premaximum (2007)
Branch, David, Troxel, M. A., Jeffery, David J., Hatano, Kazuhito, Musco, Miriam, Parrent, Jerod, ...
A comparative study of spectra of 21 Type Ia supernovae (SNe Ia) obtained about one week before maximum light, and 8 spectra obtained 11 or more days before maximum, is presented. To a large extent...
Detailed Spectral Analysis of the Type Ib Supernova 1999dn. Paper I: Hydrogen-free Models (2007)
Ketchum, Wesley, Baron, E., Branch, David
We present spectral fits to five epochs of the typical Type Ib supernova 1999dn using the generalized, non-LTE, stellar atmospheres code PHOENIX. Our goal is threefold: to determine basic physical...
A 3D radiative transfer framework: II. line transfer problems (2007)
Baron, E., Hauschildt, Peter H.
Higher resolution telescopes as well as 3D numerical simulations will require the development of detailed 3D radiative transfer calculations. Building upon our previous work we extend our method to...
Progenitors of Type Ia Supernovae: Binary Stars with White Dwarf Companions (2007)
Parthasarathy, M., Branch, David, Jeffery, David J., Baron, E.
Type Ia SNe (SNe Ia) are thought to come from carbon-oxygen white dwarfs that accrete mass from binary companions until they approach the Chandrasekhar limit, ignite carbon, and undergo complete...
Reddening, Abundances, and Line Formation in SNe II (2007)
Baron, E., Branch, David, Hauschildt, Peter H.
We present detailed NLTE spectral synthesis models of the Type II supernova 2005cs, which occurred in M51 and for which the explosion time is well determined. We show that previous estimates for the...
Thomas, R.C., Aldering, G., Antilogus, P., Aragon, C., Bailey, S., Baltay, C., ...
We present four spectra of the Type Ia supernova (SN Ia) 2006D extending from -7 to +13 days with respect to B-band maximum. The spectra include the strongest signature of unburned material at...
Direct Analysis of Spectra of the Unusual Type Ib Supernova 2005bf (2007)
Parrent, Jerod, Branch, David, Troxel, M. A., Casebeer, D., Jeffery, David J., Ketchum, W., ...
Synthetic spectra generated with the parameterized supernova synthetic-spectrum code SYNOW are compared to spectra of the unusual Type Ib supernova 2005bf. We confirm the discovery by Folatelli et...
General Relativistic Radiative Transfer (2006)
Knop, S., Hauschildt, P. H., Baron, E.
We present a general method to calculate radiative transfer including scattering in the continuum as well as in lines in spherically symmetric systems that are influenced by the effects of general...
Spectral Modeling of Type II Supernovae (2006)
Using models of the SN~IIP 2005cs, we show that detailed spectral analysis can be used to determine reddening and abundances.
Aldering, G., Antilogus, P., Aragon, C., Bailey, S., Baltay, C., ...
We present four spectra of the Type Ia supernova (SN Ia) 2006D extending from -7 to +13 days with respect to B-band maximum. The spectra include the strongest signature of unburned material at...
On the Progenitor of Supernova 1987A (2006)
Parthasarathy, M., Branch, David, Baron, E., Jeffery, David J.
A previously unpublished ultralow-dispersion spectrum of Sanduleak -69 202, the stellar progenitor of SN 1987A, is presented and the uncertain presupernova evolution of Sanduleak -69 202 is discussed.
Thomas, R.C., Aldering, G., Antilogus, P., Aragon, C., Bailey, S., Baltay, C., ...
We present four spectra of the Type Ia supernova SN Ia 2006D extending from -7 to +13 days with respect to B-band maximum. The spectra include the strongest signature of unburned material at...
On SN 2003fg: The Probable Super-Chandrasekhar-Mass SN Ia (2006)
Jeffery, David J., Branch, David, Baron, E.
Howell et al. have reported the discovery of SN Ia SN 2003fg (SNLS-03D3bb) and conclude that SN 2003fg is very likely a super-Chandrasekhar-mass SN Ia perhaps with a mass of order 2 solar masses....
Type Ia Supernova Spectral Line Ratios as Luminosity Indicators (2006)
Bongard, S., Baron, E., Smadja, G., Branch, D., Hauschildt, P.H.
Type Ia supernovae have played a crucial role in the discovery of the dark energy, via the measurement of their light curves and the determination of the peak brightness via fitting templates to the...
Quantitative Spectroscopy of Supernovae for Dark Energy Studies (2006)
Baron, E., Branch, D., Jeffery, D., Nugent, P., Thomas, R., Bongard, S., ...
Detailed quantitative spectroscopy of Type Ia supernovae (SNe~Ia) provides crucial information needed to minimize systematic effects in both ongoing SNe Ia observational programs such as the Nearby...
Spectral Modeling of SNe Ia Near Maximum Light: Probing the Characteristics of Hydro Models (2006)
Baron, E., Bongard, S., Branch, D., Hauschildt, Peter H.
We have performed detailed NLTE spectral synthesis modeling of 2 types of 1-D hydro models: the very highly parameterized deflagration model W7, and two delayed detonation models. We find that...
Goodness-of-Fit Tests DIFF1 and DIFF2 for Locally-Normalized Supernova Spectra (2006)
Jeffery, David J., Ketchum, Wesley, Branch, David, Baron, E., Elmhamdi, Abouazza, Danziger, I. J.
Two quantitative tests DIFF1 and DIFF2 for measuring goodness-of-fit between two locally-normalized supernova spectra are presented. Locally-normalized spectra are obtained by dividing a spectrum by...
Hydrogen in Type Ic Supernovae? (2006)
Branch, David, Jeffery, David J., Young, Timothy R., Baron, E.
By definition, a Type Ic supernova (SN Ic) does not have conspicuous lines of hydrogen or helium in its optical spectrum. SNe Ic usually are modelled in terms of the gravitational collapse of bare...
Steps for Solving the Transfer Equation for Arbitrary Flows in Stationary Spacetimes (2006)
Chen, B., Kantowski, R., Baron, E., Knop, S., Hauschildt, P. H.
We derive the radiative transfer equation for arbitrary stationary relativistic flows in stationary spacetimes, i.e. for steady-state transfer problems. We show how the standard characteristics...
Spectral Modeling of SNe Ia Near Maximum Light: Probing the Characteristics of Hydro Models (2006)
Baron, E., Bongard, S., Branch, David, Hauschildt, Peter H.
We have performed detailed NLTE spectral synthesis modeling of 2 types of 1-D hydro models: the very highly parameterized deflagration model W7, and two delayed detonation models. We find that...
Hauschildt, Peter H., Baron, E.
We describe a highly flexible framework to solve 3D radiation transfer problems in scattering dominated environments based on a long characteristics piece-wise parabolic formal solution and an...
Absolute-Magnitude Distributions and Light Curves of Stripped-Envelope Supernovae (2006)
Richardson, Dean, Branch, David, Baron, E.
The absolute visual magnitudes of three Type IIb, 11 Type Ib and 13 Type Ic supernovae (collectively known as stripped-envelope supernovae) are studied by collecting data on the apparent magnitude,...
Comparative Direct Analysis of Type Ia Supernova Spectra. II. Maximum Light (2006)
Branch, David, Dang, Leeann Chau, Hall, Nicholas, Ketchum, Wesley, Melakayil, Mercy, Parrent, Jerod, ...
A comparative study of near-maximum-light optical spectra of 24 Type Ia supernovae (SNe Ia) is presented. The spectra are quantified in two ways, and assigned to four groups. Seven "core-normal" SNe...
Spectral Modeling of SNe Ia Near Maximum Light: Probing the Characteristics of Hydro Models (2006)
Baron, E., Bongard, S., Branch, D., Hauschildt, Peter H.
We have performed detailed NLTE spectral synthesis modeling of 2 types of 1-D hydro models: the very highly parameterized deflagration model W7, and two delayed detonation models. We find that...
Spectral Modeling of SNe Ia Near Maximum Light: Probing the Characteristics of Hydro Models (2006)
Baron, E., Bongard, S., Branch, D., Hauschildt, Peter H.
We have performed detailed NLTE spectral synthesis modeling of 2 types of 1-D hydro models: the very highly parameterized deflagration model W7, and two delayed detonation models. We find that...
Hydrogen and helium traces in type Ib-c supernovae (2005)
Elmhamdi, A., Danziger, I. J., Branch, D., Leibundgut, B., Baron, E., Kirshner, R. P.
The spectroscopic properties of a selected optical photospheric spectra of core collapse supernovae (CCSNe) are investigated.Special attention is devoted to traces of hydrogen at early phases. The...
Type Ia Supernova Spectral Line Ratios as Luminosity Indicators (2005)
Bongard, Sebastien, Baron, E., Smadja, G., Branch, David, Hauschildt, Peter H.
Type Ia supernovae have played a crucial role in the discovery of the dark energy, via the measurement of their light curves and the determination of the peak brightness via fitting templates to the...
Type Ia Supernova Spectral Line Ratios as Luminosity Indicators (2005)
Bongard, Sebastien, Baron, E., Smadja, G., Branch, David, Hauschildt, Peter H.
Type Ia supernovae have played a crucial role in the discovery of the dark energy, via the measurement of their light curves and the determination of the peak brightness via fitting templates to the...
Quantitative Spectroscopy of Supernovae for Dark Energy Studies (2005)
Baron, E., Branch, David, Jeffery, David, Nugent, Peter, Thomas, Rollin, Bongard, Sebastien, ...
Detailed quantitative spectroscopy of Type Ia supernovae (SNe~Ia) provides crucial information needed to minimize systematic effects in both ongoing SNe Ia observational programs such as the Nearby...
6^Li in the atmosphere of GJ 117 (2005)
Christian, D. J., Mathioudakis, M., Jevremovic, D., Hauschildt, P. H., Baron, E.
We present high resolution VLT UVES observations of the active K dwarf GJ 117. 6^Li enhancement has been shown for energetic solar events, one chromospherically active binary, and several dwarf halo...
FUSE Observation of the Narrow-line Seyfert 1 Galaxy RE 1034+39 (2005)
Casebeer, Darrin A., Leighly, Karen M., Baron, E.
We present analysis from simultaneous FUSE, ASCA, and EUVE observations, as well as a reanalysis of archival HST spectra, from the extreme Narrow-line Seyfert 1 Galaxy RE 1034+39 (KUG 1031+398). RE...
Baron, E., Nugent, P.E., Branch, D., Hauschildt, P.H.
Due to their intrinsic brightness, supernovae make excellent cosmological probes. We describe the SEAM method for obtaining distances to Type IIP supernovae (SNe IIP) and present a distance to SN...
SN 1998A: Explosion of a Blue Supergiant (2005)
Pastorello, A., Baron, E., Branch, D., Zampieri, L., Turatto, M., Ramina, M., ...
We present spectroscopic and photometric observations of the peculiar Type II supernova (SN) 1998A. The light curves and spectra closely resemble those of SN 1987A, suggesting that the SN 1998A...
Comparative Direct Analysis of Spectra of Type Ia Supernovae. I. SN 1994D (2005)
Branch, David, Baron, E., Hall, Nicholas, Melakayil, Mercy, Parrent, Jerod
As the first step in a comprehensive, comparative, direct analysis of the spectra of Type Ia supernovae (SNe Ia), we use the parameterized supernova synthetic-spectrum code, SYNOW, to interpret 26...
Mattila, S., Lundqvist, P., Sollerman, J., Kozma, C., Baron, E., Fransson, C., ...
We present early time high-resolution (VLT/UVES) and late time low-resolution (VLT/FORS) optical spectra of the normal type Ia supernova, SN 2001el. The high-resolution spectra were obtained at -9...
Type Ia Supernova Spectral Line Ratios as Luminosity Indicators (2005)
Bongard, S., Baron, E., Smadja, G., Branch, D., Hauschildt, P.H.
Type Ia supernovae have played a crucial role in the discovery of the dark energy, via the measurement of their light curves and the determination of the peak brightness via fitting templates to the...
Quantitative Spectroscopy of Supernovae for Dark Energy Studies (2005)
Baron, E., Branch, D., Jeffery, D., Nugent, P., Thomas, R., Bongard, S., ...
Detailed quantitative spectroscopy of Type Ia supernovae (SNe~Ia) provides crucial information needed to minimize systematic effects in both ongoing SNe Ia observational programs such as the Nearby...
SN 1998A: explosion of a blue supergiant (2005)
Pastorello, A., Baron, E., Branch, D., Zampieri, L., Turatto, M., Ramina, M., ...
Fransson, C, Challis, PM, Chevalier, RA, Filippenko, AV, Kirshner, RP, Kozma, C, ...
Ground-based and Hubble Space Telescope observations are presented for SN 1993J and SN 1998S. SN 1998S shows strong, relatively narrow circumstellar emission lines of N III-V and C III-IV, as well as...
Type IIP Supernovae as Cosmological Probes: A SEAM Distance to SN 1999em (2004)
Baron, E., Nugent, Peter, Branch, David, Hauschildt, Peter H.
Due to their intrinsic brightness, supernovae make excellent cosmological probes. We describe the SEAM method for obtaining distances to Type IIP supernovae (SNe IIP) and present a distance to SN...
Early Spectra of Supernovae (2004)
Baron, E., Nugent, Peter, Branch, David, Hauschildt, Peter H.
We briefly describe the current version of the PHOENIX code. We then present some results on the modeling of Type II supernovae and show that fits to observations can be obtained, when account is...
Fransson, Claes, Challis, Peter M., Chevalier, Roger A., Filippenko, Alexei V., Kirshner, Robert P., Kozma, Cecilia, ...
Ground-based and Hubble Space Telescope observations are presented for SN 1993J and SN 1998S. SN 1998S shows strong, relatively narrow circumstellar emission lines of N III-V and C III-IV, as well as...
Co-moving frame radiative transfer in spherical media with arbitrary velocity fields (2004)
Baron, E., Hauschildt, Peter H.
Recently, with the advances in computational speed and availability there has been a growth in the number and resolution of fully 3-D hydrodynamical simulations. However, all of these simulations are...
Reading the Spectra of the Most Peculiar Type Ia Supernova 2002cx (2004)
Branch, David, Baron, E., Thomas, R. C., Kasen, D., Li, Weidong, Filippenko, Alexei V.
In spite of the apparent lack of Si II and S II features in its spectra, SN 2002cx was classified as a peculiar Type Ia supernova (SN Ia) on the basis of its overall photometric and spectroscopic...
Type IIP supernovae as cosmological probes: A SEAM distance to SN 1999em (2004)
Baron, E., Nugent, Peter E., Branch, David, Hauschildt, Peter H.
Because of their intrinsic brightness, supernovae make excellent cosmological probes. We describe the spectral-fitting expanding atmosphere method (SEAM) for obtaining distances to Type IIP...
Direct Analysis of Spectra of the Peculiar Type Ia Supernova 2000cx (2004)
Branch, D., Thomas, R. C., Baron, E., Kasen, D., Hatano, K., Nomoto, K., ...
The Type Ia SN 2000cx exhibited multiple peculiarities, including a lopsided B-band light-curve peak that does not conform to current methods for using shapes of light curves to standardize SN Ia...
Hauschildt, Peter H., Baron, E.
We describe two separate wavelength discretization schemes that can be used in the numerical solution of the comoving frame radiative transfer equation. We present an improved second order...
Baron, E., Nugent, P.E., Branch, D., Hauschildt, P.H.
Due to their intrinsic brightness, supernovae make excellent cosmological probes. We describe the SEAM method for obtaining distances to Type IIP supernovae (SNe IIP) and present a distance to SN...
Baron, E., Nugent, P.E., Branch, D., Hauschildt, P.H.
Due to their intrinsic brightness, supernovae make excellent cosmological probes. We describe the SEAM method for obtaining distances to Type IIP supernovae (SNe IIP) and present a distance to SN...
Low Luminosity Type II Supernovae: Spectroscopic and Photometric Evolution (2003)
Pastorello, A., Zampieri, L., Turatto, M., Cappellaro, E., Meikle, W. P. S., Benetti, S., ...
In this paper we present spectroscopic and photometric observations for four core collapse supernovae (SNe), namely SNe 1994N, 1999br, 1999eu and 2001dc. Together with SN 1997D, we show that they...
High-resolution optical studies of nearby Type Ia supernovae (2003)
Lundqvist, Peter, Mattila, Seppo, Sollerman, Jesper, Baron, E., Ehrenfreund, Pascale, Fransson, Claes, ...
Since April 2000, a program using the ESO/VLT/UVES to search for early circumstellar signatures from nearby supernovae has been conducted. Until now, two Type Ia supernovae have been observed, SNe...
Optical Spectra of the Type Ia Supernova 1998aq (2003)
Branch, D., Garnavich, P., Matheson, T., Baron, E., Thomas, R. C., Hatano, K., ...
We present 29 optical spectra of the normal Type Ia SN 1998aq, ranging from 9 days before to 241 days after the time of maximum brightness. This spectroscopic data set, together with photometric data...
Detectibility of Mixed Unburnt C+O in Type Ia Supernova Spectra (2003)
Baron, E., Lentz, Eric, Hauschildt, Peter H.
Motivated by recent 3-D calculations of the explosion of Type Ia supernova via a pure deflagration we calculate the observed spectra at 15-25 days past maximum light of a parameterized model which...
On the Geometry of the High-Velocity Ejecta of the Peculiar Type Ia Supernova 2000cx (2003)
Thomas, R. C., Branch, David, Baron, E., Nomoto, Ken'ichi, Li, Weidong, Filippenko, Alexei V.
High-velocity features in Type Ia supernova spectra provide a way to probe the outer layers of these explosions. The maximum-light spectra of the unique Type Ia supernova 2000cx exhibit interesting...
Kasen, Daniel, Nugent, Peter, Wang, Lifan, Howell, D. A., Wheeler, J. Craig, Hoeflich, Peter, ...
SN 2001el is the first normal Type Ia supernova to show a strong, intrinsic polarization signal. In addition, during the epochs prior to maximum light, the CaII IR triplet absorption is seen...
Determination of Primordial Metallicity and Mixing in the Type IIP Supernova 1993W (2002)
Baron, E., Nugent, Peter E., Branch, David, Hauschildt, Peter H., Turatto, M., Cappellaro, E.
We present the results of a large grid of synthetic spectra and compare them to early spectroscopic observations of SN 1993W. This supernova was discovered close to its explosion date and at a...
Highlights of Stellar Modeling with PHOENIX (2002)
Baron, E., Hauschildt, Peter H., Allard, F., Lentz, Eric J., Aufdenberg, J., Schweitzer, A., ...
We briefly describe the current version of the PHOENIX code. We then present some illustrative results from the modeling of Type Ia and Type II supernovae, hot stars, and irradiated giant planets....
The Spectrum of the FeLoBAL Quasar FBQS 1214+2803: A Resonance-Scattering Interpretation (2002)
Branch, D., Leighly, K. M., Thomas, R. C., Baron, E.
The usual interpetation of the spectrum of a BAL QSO is that a broad-band continuum from the central engine plus broad emission lines from a surrounding region (the BELR) emerges from near the center...
Detectibility of Hydrogen Mixing in Type Ia Supernova pre-Maximum Spectra (2002)
Lentz, Eric J., Baron, E., Hauschildt, Peter H., Branch, David
The presence of a small amount of hydrogen is expected in most single degenerate scenarios for producing a Type Ia supernova (SN Ia). While hydrogen may be detected in very early high resolution...
Synthetic Spectra from 3D Models of Supernovae (2002)
Thomas, R. C., Baron, E., Branch, David
We describe Brute, a code for generating synthetic spectra from 3D supernova models. It is based on a Monte Carlo implementation of the Sobolev approximation. The current version is highly...
Parallelization Strategies for ALI Radiative Transfer in Moving Media (2002)
Baron, E., Hauschildt, P. H., Lowenthal, D.
We describe the method we have used to parallelize our spherically symmetric special relativistic short characteristics general radiative transfer code PHOENIX. We describe some possible...
Exceptionally Bright Type Ib Supernova 1991D (2002)
Benetti, S., Branch, D., Turatto, M., Cappellaro, E., Baron, E., Zampieri, L., ...
Photometric and spectroscopic observations of the peculiar Type Ib Supernova 1991D are presented. SN 1991D was exceptionally bright for a Type Ib supernova. The He I lines were rather weak and the...
Detailed spectroscopic analysis of SN 1987A: The distance to the LMC using the SEAM method (2002)
Mitchell, Robert C., Baron, E., Branch, David, Hauschildt, Peter H., Nugent, Peter E., Lundqvist, Peter, ...
Supernova 1987A remains the most well-studied supernova to date. Observations produced excellent broad-band photometric and spectroscopic coverage over a wide wavelength range at all epochs. We model...
Detailed Spectroscopic Analysis of SN 1987A: The Distance to the LMC using the SEAM method (2002)
Mitchell, Robert C., Baron, E., Branch, David, Hauschildt, Peter H., Nugent, Peter E., Lundqvist, Peter, ...
Supernova 1987A remains the most well-studied supernova to date. Observations produced excellent broad-band photometric and spectroscopic coverage over a wide wavelength range at all epochs. We model...
Pun, Chun S. J., Michael, Eli, Zhekov, Svetozar A., McCray, Richard, Garnavich, Peter M., Challis, Peter M., ...
We report and interpret HST/STIS long-slit observations of the optical and ultraviolet (1150 - 10270 Angstrom) emission-line spectra of the rapidly brightening Spot 1 on the equatorial ring of SN...
Non-LTE Effects of Na I in the Atmosphere of HD209458b (2002)
Barman, Travis S., Hauschildt, Peter H., Schweitzer, Andreas, Stancil, Phillip C., Baron, E., Allard, France
The recent announcement that sodium absorption has been observed in the atmosphere of HD209458b, the only EGP observed to transit its parent star, is the first direct detection of an EGP atmosphere....
The Spectral Energy Distribution and Mass-loss Rate of the A-Type Supergiant Deneb (2002)
Aufdenberg, J. P., Hauschildt, P. H., Baron, E., Nordgren, T. E., Howarth, I. D., Burnley, A. W., ...
A stellar wind module has been developed for the PHOENIX stellar atmosphere code for the purpose of computing non-LTE, line-blanketed, expanding atmospheric structures and detailed synthetic spectra...
Pun, JCS, Eli, M, Zhekov, SA, McCray, R, Garnavich, PM, Challis, PM, ...
We report and interpret Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS) long-slit observations of the optical and ultraviolet (115010270 Å) emission line spectra of the...
Mitchell, RC, Baron, E, Branch, D, Hauschildt, PH, Nugent, PE, Lundqvist, P, ...
Supernova 1987A remains the most well studied supernova to date. Observations produced excellent broadband photometric and spectroscopic coverage over a wide wavelength range at all epochs. We model...
Atmospheric Analysis of the M/L- and M/T-Dwarf Binary Systems LHS 102 and Gliese 229 (2001)
Leggett, S. K., Hauschildt, Peter H., Allard, F., Geballe, T. R., Baron, E.
We present 0.9-2.5um spectroscopy with R~800 and 1.12-1.22um spectroscopy with R~5800 for the M dwarfs Gl 229A and LHS 102A, and for the L dwarf LHS 102B. We also report IZJHKL' photometry for both...
A Comparative Study of the Absolute-Magnitude Distributions of Supernovae (2001)
Richardson, Dean, Branch, David, Casebeer, Darrin, Millard, Jennifer, Thomas, R. C., Baron, E.
The Asiago Supernova Catalog is used to carry out a comparative study of supernova absolute-magnitude distributions. An overview of the absolute magnitudes of the supernovae in the current...
Optical Spectra of Supernovae (2001)
Branch, David, Baron, E., Jeffery, David J.
Supernova flux and polarization spectra bring vital information on the geometry, physical conditions, and composition structure of the ejected matter. For some supernovae the circumstellar matter is...
A complete analytic inversion of supernova lines in the Sobolev approximation (2001)
Kasen, Daniel, Branch, David, Baron, E., Jeffery, David
We show that the shape of P-Cygni line profiles of photospheric phase supernova can be analytically inverted to extract both the optical depth and source function of the line -- i.e. all the physical...
Coping with Type Ia Supernova "Evolution" When Probing the Nature of the Dark Energy (2001)
Branch, David, Perlmutter, Saul, Baron, E., Nugent, Peter
Observations of high-redshift Type Ia supernovae (SNe Ia) have provided strong evidence that the dark energy is real, and making further accurate observations of high-redshift SNe Ia is the most...
A Complete Analytic Inversion of Supernova Lines in the Sobolev Approximation (2001)
Kasen, Daniel, Branch, David, Baron, E., Jeffery, David
We show that the shape of P-Cygni line profiles of photospheric phase supernova can be analytically inverted to extract both the optical depth and source function of the line -- i.e. all the physical...
Spectral Consequences of Deviation from Spherical Composition Symmetry in Type Ia Supernovae (2001)
Thomas, R. C., Kasen, Daniel, Branch, David, Baron, E.
We investigate the prospects for constraining the maximum scale of clumping in composition that is consistent with observed Type Ia supernova flux spectra. Synthetic spectra generated without purely...
Hauschildt, Peter H., Lowenthal, David K., Baron, E.
We describe two parallel algorithms for line opacity calculations based on a local file and on a global file approach. The performance and scalability of both approaches is discussed for different...
NLTE Synthetic Spectral Fits to the Type Ia Supernova 1994D in NGC 4526 (2001)
Lentz, Eric J., Baron, E., Branch, David, Hauschildt, Peter H.
We have fit the normal, well observed, Type Ia Supernova (SN Ia) SN 1994D with non-LTE spectra of the deflagration model W7. We find that well before maximum luminosity W7 fits the optical spectra of...
Nickel Mixing in the Outer Layers of SN 1987A (2001)
Mitchell, Robert C., Baron, E., Branch, David, Lundqvist, Peter, Blinnikov, Sergei, Hauschildt, Peter H., ...
Supernova 1987A remains the most well-observed and well-studied supernova to date. Observations produced excellent broad-band photometric and spectroscopic coverage over a wide wavelength range at...
High intensity heavy ion beams for exotic nuclei production at GANIL (2001)
Baron, E., Barue, Ch., Baelde, J.L., Berthe, C., Bibet, D., Chautard, F., ...
High intensity heavy ion beams for exotic nuclei production at GANIL (2001)
Baron, E., Barue, Ch., Baelde, J.L., Berthe, C., Bibet, D., Chautard, F., ...
SPIRAL II : Preliminary design study (2001)
De Angelis, G., Brandenburg, S., Dessagne, Ph., Gatesoupe, J.P., Gelletly, W., Huyse, M., ...
SPIRAL II : Preliminary design study (2001)
De Angelis, G., Brandenburg, S., Dessagne, Ph., Gatesoupe, J.P., Gelletly, W., Huyse, M., ...
SPIRAL II : Preliminary design study (2001)
De Angelis, G., Brandenburg, S., Dessagne, Ph., Gatesoupe, J.P., Gelletly, W., Huyse, M., ...
Preliminary Spectral Analysis of the Type II Supernova 1999em (2000)
Baron, E., Branch, David, Hauschildt, Peter H., Filippenko, Alexei V., Kirshner, R. P., Challis, P. M., ...
We have calculated fast direct spectral model fits to two early-time spectra of the Type-II plateau SN 1999em, using the SYNOW synthetic spectrum code. The first is an extremely early blue optical...
Lentz, Eric J., Baron, E., Lundqvist, Peter, Branch, David, Hauschildt, Peter H., Fransson, Claes, ...
We present spectral analysis of early observations of the Type IIn supernova 1998S using the general non-local thermodynamic equilibrium atmosphere code \tt PHOENIX}. We model both the underlying...
Non-LTE Modeling of Nova Cygni 1992 (2000)
Short, C. I., Hauschildt, P. H., Starrfield, S., Baron, E.
We present a grid of nova models that have an extremely large number of species treated in non-LTE, and apply it to the analysis of an extensive time series of ultraviolet spectroscopic data for Nova...
On the Spectroscopic Diversity of Type Ia Supernovae (2000)
Hatano, Kazuhito, Branch, David, Lentz, Eric J., Baron, E., Filippenko, Alexei V., Garnavich, Peter M.
A comparison of the ratio of the depths of two absorption features in the spectra of TypeIa supernovae (SNe Ia) near the time of maximum brightness with the blueshift of the deep red Si II absorption...
SN 1984A and Delayed Detonation Models of Type Ia Supernovae (2000)
Lentz, Eric J., Baron, E., Branch, David, Hauschildt, P. H.
SN 1984A shows unusually large expansion velocities in lines from freshly synthesized material, relative to typical Type Ia Supernovae (SNe Ia). SN 1984A is an example of a group of SNe Ia which have...
Non-LTE treatment of molecules in the photospheres of cool stars (2000)
Schweitzer, Andreas, Hauschildt, Peter H., Baron, E.
We present a technique to treat systems with very many levels, like molecules, in non-LTE. This method is based on a superlevel formalism coupled with rate operator splitting. Superlevels consist of...
Hauschildt, Peter H., Allard, France, Ferguson, Jason, Baron, E., Alexander, David R.
We present the extension of our NextGen model atmosphere grid to the regime of giant stars. The input physics of the models presented here is nearly identical to the NextGen dwarf atmosphere models,...
Spectral Models of the Type Ic SN 1994I in M51 (1999)
Baron, E., Branch, David, Hauschildt, Peter H., Filippenko, Alexei V., Kirshner, R. P.
We present detailed non-local thermodynamic equilibrium (NLTE) synthetic spectra for comparison with a time series of observed optical spectra of the Type Ic supernova 1994I which occurred in M51....
Direct Analysis of Spectra of the Type Ic Supernova 1994I (1999)
Millard, J., Branch, D., Baron, E., Hatano, K., Fisher, A., Filippenko, A., ...
Synthetic spectra generated with the parameterized supernova synthetic-spectrum code SYNOW are compared to observed photospheric-phase spectra of the Type Ic supernova 1994I. The observed optical...
Massive Multi-species, Multi-level NLTE Model Atmospheres for Novae in Outburst (1999)
Short, C. Ian, Hauschildt, Peter H., Baron, E.
We have used our PHOENIX multi-purpose model atmosphere code to calculate atmospheric models that represent novae in the optically thick wind phases of their outburst. We have improved the treatment...
Metallicity Effects in NLTE Model Atmospheres of Type Ia Supernovae (1999)
Lentz, Eric J., Baron, E., Branch, David, Hauschildt, Peter H., Nugent, Peter E.
We have calculated a grid of photospheric phase atmospheres of Type Ia supernovae (SNe Ia) with metallicities from ten times to one thirtieth the solar metallicity in the C+O layer of the...
On the High--Velocity Ejecta of the Type Ia Supernova 1994D (1999)
Hatano, K., Branch, D., Fisher, A., Baron, E., Filippenko, A. V.
Synthetic spectra generated with the parameterized supernova synthetic-spectrum code SYNOW are compared to spectra of the Type Ia SN 1994D that were obtained before the time of maximum brightness....
Experience with high intensity operation of the GANIL facility (1999)
Baron, E., Berthe, C., Bibet, D., Chabert, A., Jamet, C., ...
Experience with high intensity operation of the GANIL facility (1999)
Baron, E., Berthe, C., Bibet, D., Chabert, A., Jamet, C., ...
Preliminary Spectral Analysis of the Type II Supernova 1999em (1999)
E. Baron, David Branch, Peter H. Hauschildt
We have calculated fast direct spectral model fits to two early spectra of SN 1999em, using the SYNOW synthetic spectrum code. The first is an extremely early blue optical spectrum and the second a...
Peter H. Hauschildt, France Allard, Jason Ferguson, E. Baron, David R. Alexander
We present the extension of our NextGen model atmosphere grid to the regime of giant stars. The input physics of the models presented here is nearly identical to the NextGen dwarf atmosphere models,...
Limits on Violation of Pauli Principle by Nucleons (1999)
E. Baron, Rabindra N. Mohapatra, Vigdor L. Teplitz
We consider nuclei produced in core collapse supernovae and subjected to a high neutron flux. We show that an accelerator mass spectrometry experiment that searched for traces of anomalous iron...
Ion Signatures in Supernova Spectra (1998)
Hatano, K., Branch, D., Fisher, A., Deaton, J., Baron, E.
A systematic survey of ions that could be responsible for features in the optical spectra of supernovae is carried out. Six different compositions that could be encountered in supernovae are...
Limits on Pauli principle violation by nucleons (1998)
Baron, E., Mohapatra, R. N., Teplitz, V. L.
We consider nuclei produced in core collapse supernovae and subjected to a high neutron flux. We show that an accelerator mass spectrometry experiment that searched for traces of anomalous iron...
Numerical Solution of the Expanding Stellar Atmosphere Problem (1998)
In this paper we discuss numerical methods and algorithms for the solution of NLTE stellar atmosphere problems involving expanding atmospheres, e.g., found in novae, supernovae and stellar winds. We...
The NextGen Model Atmosphere grid for $3000\le \Teff \le 10000\K$ (1998)
Hauschildt, Peter H., Allard, France, Baron, E.
We present our NextGen Model Atmosphere grid for low mass stars for effective temperatures larger than $3000\K$. These LTE models are calculated with the same basic model assumptions and input...
On the Spectrum and Nature of the Peculiar Type Ia Supernova 1991T (1998)
Fisher, A., Branch, D., Hatano, K., Baron, E.
A parameterized supernova synthetic-spectrum code is used to study line identifications in the photospheric-phase spectra of the peculiar Type Ia SN 1991T, and to extract some constraints on the...
Monte Carlo Simulation of the Galactic Al-26 Gamma-Ray Map (1998)
Lentz, Eric J., Branch, David, Baron, E.
The observed map of 1.809 MeV gamma-rays from radioactive Al-26 (Oberlack et al, 1996) shows clear evidence of Galactic plane origin with an uneven distribution. We have simulated the map using a...
R-process in Low Entropy Neutrino Driven Winds (1998)
Baron, E., Cowan, John J., Rogers, Tamara, Gutierrez, Kris
Until we can more carefully assess the validity of the physical assumptions made we withdraw this paper.
A Spherical Non-LTE Line-Blanketed Stellar Atmosphere Model of the Early B Giant epsilon CMa (1998)
Aufdenberg, J. P., Hauschildt, P. H., Shore, S. N., Baron, E.
We use a spherical non-LTE fully line blanketed model atmosphere to fit the full multi-wavelength spectrum, including the extreme ultraviolet (EUV) continuum observed by the {\it Extreme Ultraviolet...
Numerical Solution of the Expanding Stellar Atmosphere Problem (1998)
In this paper we discuss numerical methods and algorithms for the solution of NLTE stellar atmosphere problems involving expanding atmospheres, e.g., found in novae, supernovae and stellar winds. We...
Parallel Implementation of the PHOENIX Generalized Stellar Atmosphere Program (1998)
Peter H. Hauschildt, E. Baron, France Allard
We describe the parallel implementation of our generalized stellar atmosphere and NLTE radiative transfer computer program PHOENIX. We discuss the parallel algorithms we have developed for radiative...
Baron, E., Hauschildt, Peter H.
We describe an important addition to the parallel implementation of our generalized NLTE stellar atmosphere and radiative transfer computer program PHOENIX. In a previous paper in this series we...
On the Origin of Planetary Nebula K648 in Globular Cluster M15 (1997)
Buell, J. F., Henry, R. B. C., Baron, E., Kwitter, K. B.
We examine two scenarios for formation of the planetary nebula K648: a prompt scenario where the planetary nebula is ejected and formed immediately after a helium shell flash and a delayed scenario...
Detailed NLTE Model Atmospheres for Novae during Outburst: I. New Theoretical Results (1997)
Hauschildt, Peter H., Shore, Steven N., Schwarz, Greg J., Baron, E., Starrfield, S.
We present new detailed NLTE calculations for model atmospheres of novae during outburst. This fully self-consistent NLTE treatment for a number of model atoms includes 3922 NLTE levels and 47061...
NLTE effects of Ti~I in M dwarfs and giants (1997)
Hauschildt, Peter H., Allard, France, Alexander, David R., Baron, E.
We present detailed NLTE Ti~I calculations in model atmospheres of cool dwarf and giant stars. A fully self-consistent NLTE treatment for a Ti~I model atom with 395 levels and 5279 primary...
Synthetic Spectra of Hydrodynamic Models of Type Ia Supernovae (1996)
Nugent, P., Baron, E., Branch, D., Fisher, A., Hauschildt, Peter
We present detailed NLTE synthetic spectra of hydrodynamic SNe Ia models. We make no assumptions about the form of the spectrum at the inner boundary. We calculate both Chandrasekhar-mass...
Parallel Implementation of the PHOENIX Generalized Stellar Atmosphere Program (1996)
Hauschildt, Peter H., Baron, E., Allard, France
We describe the parallel implementation of our generalized stellar atmosphere and NLTE radiative transfer computer program PHOENIX. We discuss the parallel algorithms we have developed for radiative...
NLTE Effects in Modeling of Supernovae near Maximum Light (1996)
Baron, E., Hauschildt, P. H., Nugent, P., Branch, D.
Supernovae, with their diversity of compositions, velocities, envelope masses, and interactions are good testing grounds for probing the importance of NLTE in expanding atmospheres. In addition to...
Low Hubble Constant from Type Ia Supernovae by van den Bergh's Method (1996)
Branch, David, Fisher, Adam, Baron, E., Nugent, Peter
An interesting way to calibrate the absolute magnitudes of remote Type Ia supernovae (SNe Ia) that are well out in the Hubble flow, and thus determine the value of the Hubble constant, H_0, has been...
NLTE Model Atmospheres for M Dwarfs and Giants (1996)
Hauschildt, Peter H., Allard, France, Alexander, David R., Schweitzer, Andreas, Baron, E.
The atmospheres of M stars are dominated by a small number of very strong molecular compounds (H$_2$O, TiO, H$_2$, CO, VO). Most of the hydrogen is locked in molecular H$_2$, most of the carbon in...
Non-LTE Treatment of Fe II in Astrophysical Plasmas (1996)
Hauschildt, Peter H., Baron, E.
We describe our implementation of an extremely detailed model atom of singly ionized iron for NLTE computations in static and moving astrophysical plasmas. Our model atom includes 617 levels, 13675...
The Effects of Fe II NLTE on Nova Atmospheres and Spectra (1996)
Hauschildt, Peter H., Baron, E., Starrfield, Sumner, Allard, France
The atmospheres of novae at early times in their outbursts are very extended, expanding shells with low densities. Models of these atmospheres show that NLTE effects are very important and must be...
Epidemiology of HCV infection: disease and renal transplantation (1996)
Cisterne, J. M., Rostaing, L., Izopet, J., Chabannier, M. H., Baron, E., Duffaut, M., ...
We studied the prevalence of HCV infection in a cohort of 346 patients who received renal transplantation between January 1989 and April 1994. Assessments were made at the time of surgery, one year...
NLTE Effects in Modeling of Supernovae near Maximum (1996)
E. Baron, P. H. Hauschildt, P. Nugent, D. Branch
Supernovae, with their diversity of compositions, velocities, envelope masses, and interactions are good testing grounds for probing the importance of NLTE in expanding
NLTE Modeling of SNe Ia Near Maximum Light (1995)
Baron, E., Hauschildt, P. H., Mezzacappa, A.
Modeling the atmospheres of SNe~Ia requires the solution of the NLTE radiative transfer equation. We discuss the formulation of the radiative transfer equation in the co-moving frame. For...
Preliminary Spectral Analysis of SN 1994I (1995)
Baron, E., Hauschildt, P. H., Branch, D., Kirshner, R. P., Filippenko, A. V.
We present optical spectra of the Type Ic supernova 1994I in M51 and preliminary non-LTE analysis of the spectra. Our models are not inconsistent with the explosions of C+O cores of massive stars....
Branch, David, Romanishin, W., Baron, E.
Statistical connections between the properties of Type Ia supernovae (SNe Ia) and the B--V colors of their parent galaxies are established. Compared to SNe Ia in blue galaxies [B-V$\la$0.75], SNe Ia...
Evidence for a Spectroscopic Sequence Among SNe Ia (1995)
Nugent, Peter, Phillips, Mark, Baron, E., Branch, David, Hauschildt, Peter
In this Letter we present evidence for a spectral sequence among Type Ia supernovae (SNe Ia). The sequence is based on the systematic variation of several features seen in the near-maximum light...
Preliminary Spectral Analysis of SN 1994I (1995)
E. Baron, P. H. Hauschildt, D. Branch, R.P. Kirshner, A.V. Filippenko
We present optical spectra of the Type Ic supernova 1994I in M51 and preliminary non-LTE analysis of the spectra. Our models are not inconsistent with the explosions of C+O cores of massive stars....
Rostaing, L., Izopet, J., Baron, E., Duffaut, M., Puel, J., Durand, D., ...
Chronic hepatitis C is a common cause of viral liver disease in kidney transplant recipients. To assess the efficacy and the safety of therapy with interferon alpha (IFNα) in such a population we...
A cyclotron as a high resolution mass spectrometer for fast secondary ions (1994)
Auger, G., Mittig, W., Lipine-Szily, A., Fifield, L.k., Bajard, M., Baron, E., ...
A cyclotron as a high resolution mass spectrometer for fast secondary ions (1994)
Auger, G., Mittig, W., Lipine-Szily, A., Fifield, L.k., Bajard, M., Baron, E., ...
The SPIRAL radioactive ion beam facility (1994)
Alamanos, N., Blumenfeld, Y., Doubre, H., Guillemaud-Mueller, D., Mueller, A.C., Schultz, N., ...
The SPIRAL radioactive ion beam facility (1994)
Alamanos, N., Blumenfeld, Y., Doubre, H., Guillemaud-Mueller, D., Mueller, A.C., Schultz, N., ...
The SPIRAL radioactive ion beam facility (1994)
Alamanos, N., Blumenfeld, Y., Doubre, H., Guillemaud-Mueller, D., Mueller, A.C., Schultz, N., ...
The SISSI project : an intense secondary ion source using superconducting solenoid lenses (1991)
Joubert, A., Baron, E., Grunberg, C., Larson, J.D., Mittig, W., Ripouteau, F.
In order to make a better use of the higher beam intensities soon available at GANIL, a proposal called SISSI was presented in 1989. It consists of a set of two superconducting solenoid lenses of...
The SISSI project : an intense secondary ion source using superconducting solenoid lenses (1991)
Joubert, A., Baron, E., Grunberg, C., Larson, J.D., Mittig, W., Ripouteau, F.
In order to make a better use of the higher beam intensities soon available at GANIL, a proposal called SISSI was presented in 1989. It consists of a set of two superconducting solenoid lenses of...
The SISSI project : an intense secondary ion source using superconducting solenoid lenses (1991)
Joubert, A., Baron, E., Grunberg, C., Larson, J.D., Mittig, W., Ripouteau, F.
In order to make a better use of the higher beam intensities soon available at GANIL, a proposal called SISSI was presented in 1989. It consists of a set of two superconducting solenoid lenses of...
Baron, E., De Billy, M., Quentin, G.
Nous nous proposons d'étudier les propriétés directionnelles des ondes de volume engendrées par l'interaction d'une onde de surface avec une rainure de forme rectangulaire usinée au centre de la...
17 - Etude expérimentale de la diffusion d'une onde de Rayleigh par une rainure rectangulaire (1985)
In this paper, we study the conversion into bulk-wave of a Rayleigh wave incident on a rectangular groove . More precisely, we study the angular distribution of the bulk-wave power scattered . These...
17 - Etude expérimentale de la diffusion d'une onde de Rayleigh par une rainure rectangulaire (1985)
In this paper, we study the conversion into bulk-wave of a Rayleigh wave incident on a rectangular groove . More precisely, we study the angular distribution of the bulk-wave power scattered . These...
Baron, E., De Billy, M., Quentin, G.
Nous nous proposons d'étudier les propriétés directionnelles des ondes de volume engendrées par l'interaction d'une onde de surface avec une rainure de forme rectangulaire usinée au centre de la...
Baron, E., De Billy, M., Quentin, G.
Nous nous proposons d'étudier les propriétés directionnelles des ondes de volume engendrées par l'interaction d'une onde de surface avec une rainure de forme rectangulaire usinée au centre de la...
Carbon foil behaviour with I beams (1981)
Frick, G., Heusch, B., Helleboid, J.M., Niemeskern, A., Wagner, P., Baron, E., ...
Carbon foil behaviour with I beams (1981)
Frick, G., Heusch, B., Helleboid, J.M., Niemeskern, A., Wagner, P., Baron, E., ...
LE GRAND ACCELERATEUR NATIONAL D'IONS LOURDS (GANIL) (1979)
Le Grand Accélérateur National d'Ions Lourds (GANIL) est actuellement en construction à Caen. On expose le principe de fonctionnement de la machine, ses performances prévues, ainsi que l'état...
LE GRAND ACCELERATEUR NATIONAL D'IONS LOURDS (GANIL) (1979)
Le Grand Accélérateur National d'Ions Lourds (GANIL) est actuellement en construction à Caen. On expose le principe de fonctionnement de la machine, ses performances prévues, ainsi que l'état...
LE GRAND ACCELERATEUR NATIONAL D'IONS LOURDS (GANIL) (1979)
Le Grand Accélérateur National d'Ions Lourds (GANIL) est actuellement en construction à Caen. On expose le principe de fonctionnement de la machine, ses performances prévues, ainsi que l'état...
LA NOUVELLE GÉNÉRATION DES SOURCES D'IONS LOURDS MULTICHARGES (1977)
Cet article tente de faire le point sur les progrès actuels des sources d'ions lourds multichargés : sources à confinement, à résonance cyclotron et sources laser. Après avoir rappelé...
Stripping experiments in carbon foils with heavy ions in the energy range of 0.4-0.9 mev/a (1977)
Frick, G., Chaki, V., Heusch, B., Ricaud, Ch., Wagner, P., Baron, E.
We studied the properties of heavy ions stripped by carbon foils. Ni, I and Au ions of 0.4 - 0.9 MeV/A were used to bombard foils of 5 - 200 μg/cm 2. In these measurements the ions were detected...
LA NOUVELLE GÉNÉRATION DES SOURCES D'IONS LOURDS MULTICHARGES (1977)
Cet article tente de faire le point sur les progrès actuels des sources d'ions lourds multichargés : sources à confinement, à résonance cyclotron et sources laser. Après avoir rappelé...
Stripping experiments in carbon foils with heavy ions in the energy range of 0.4-0.9 MeV/A (1977)
Frick, G., Chaki, V., Heusch, B., Ricaud, Ch., Wagner, P., Baron, E.
Stripping experiments in carbon foils with heavy ions in the energy range of 0.4-0.9 MeV/A (1977)
Frick, G., Chaki, V., Heusch, B., Ricaud, Ch., Wagner, P., Baron, E.
Stripping experiments in carbon foils with heavy ions in the energy range of 0.4-0.9 mev/a (1977)
Frick, G., Chaki, V., Heusch, B., Ricaud, Ch., Wagner, P., Baron, E.
We studied the properties of heavy ions stripped by carbon foils. Ni, I and Au ions of 0.4 - 0.9 MeV/A were used to bombard foils of 5 - 200 μg/cm 2. In these measurements the ions were detected...
LA NOUVELLE GÉNÉRATION DES SOURCES D'IONS LOURDS MULTICHARGES (1977)
Cet article tente de faire le point sur les progrès actuels des sources d'ions lourds multichargés : sources à confinement, à résonance cyclotron et sources laser. Après avoir rappelé...
Stripping experiments in carbon foils with heavy ions in the energy range of 0.4-0.9 mev/a (1977)
Frick, G., Chaki, V., Heusch, B., Ricaud, Ch., Wagner, P., Baron, E.
We studied the properties of heavy ions stripped by carbon foils. Ni, I and Au ions of 0.4 - 0.9 MeV/A were used to bombard foils of 5 - 200 μg/cm 2. In these measurements the ions were detected...
Stripping experiments in carbon foils with heavy ions in the energy range of 0.4-0.9 mev/a (1977)
Frick, G., Chaki, V., Heusch, B., Ricaud, Ch., Wagner, P., Baron, E.
We studied the properties of heavy ions stripped by carbon foils. Ni, I and Au ions of 0.4 - 0.9 MeV/A were used to bombard foils of 5 - 200 μg/cm 2. In these measurements the ions were detected...