Lim, B., Sung, H., Bessell, M. S., Karimov, R., Ibrahimov, M.
Observation of standard stars is of crucial importance in stellar photometry. We have studied the standard transformation relations of the UBVRI CCD photometric system at the Maidanak Astronomical...
VLT/NACO Deep imaging survey of young, nearby austral stars (2009)
Chauvin, G., Bonavita, M., Zuckerman, B., Dumas, C., Bessell, M. S., ...
Since November 2002, we have conducted the largest deep imaging survey of the young, nearby associations of the southern hemisphere. Our goal is detection and characterization of substellar...
Korn, A. J., Richard, O., Mashonkina, L., Bessell, M. S., Frebel, A., Aoki, W.
Based on spectroscopic constraints derived from NLTE line formation, we explore the likely range of stellar parameters (T_eff and log g) for the hyper-metal-poor (HMP) star HE 1327-2326. Combining...
Schoerck, T., Christlieb, N., Cohen, J. G., Beers, T. C., Shectman, S., Thompson, I., ...
We determine the metallicity distribution function (MDF) of the Galactic halo by means of a sample of 1638 metal-poor stars selected from the Hamburg/ESO objective-prism survey (HES). The sample was...
Spectrophotometric properties of pre-main sequence stars: the Epsilon Chamaeleontis cluster (2008)
Lyo, A-Ran, Lawson, Warrick A., Bessell, M. S.
We present a study of flux-calibrated low-resolution optical spectroscopy of ten stars belonging to eight systems in the ~ 5 Myr-old Epsilon Chamaeleontis (Eps Cha) pre-main-sequence (PMS) star...
Chemical similarities between Galactic bulge and local thick disk red giant stars (2008)
Melendez, J., Asplund, M., Alves-Brito, A., Cunha, K., Barbuy, B., Bessell, M. S., ...
The evolution of the Milky Way bulge and its relationship with the other Galactic populations is still poorly understood. The bulge has been suggested to be either a merger-driven classical bulge or...
Coronal Temperature as an Age Indicator (2008)
Sung, Hwankyung, Bessell, M. S., Sana, Hugues
The X-ray spectra of late type stars can generally be well fitted by a two temperature component model of the corona. We fnd that the temperature of both components are strong functions of stellar...
Using The, Near Infrared, Camera On, The Hubble, Space Telescope, J. Farihi, ...
A search of 116 nearby young stars has been carried out in Cycle 13 with the Hubble Space Telescope using the Near Infrared Camera and Multi Object Spectrograph (NICMOS). Camera 2 coronagraphic...
Gas and Dust Associated with the Strange, Isolated, Star BP Piscium (2008)
Zuckerman, B., Melis, C., Song, Inseok, Meier, David S., Perrin, Marshall D., Macintosh, Bruce, ...
We have carried out a multiwavelength observational campaign demonstrating some of the remarkable properties of the infrared-bright variable star BP Psc. Surrounded by a compact dusty, gaseous disk,...
Chemical similarities between galactic bulge and local thick disk red giant stars (2008)
Meléndez, J., Asplund, M., Alves-Brito, A., Cunha, K., Barbuy, B., Bessell, M. S., ...
Gas and dust associated with the strange, isolated, star BP Piscium (2008)
Zuckerman, B., Melis, C., Song, Inseok, Meier, David S., Perrin, Marshall D., Macintosh, Bruce, ...
Also archived in: arXiv:0802.0226v2 [astro-ph]
A new sample of extremely/ultra metal-poor stars (2008)
Garcia Perez, A. E., Christlieb, N., Ryan, S. G., Beers, T. C., Aoki, W., Asplund, M., ...
Discovery of new nearby L and late-M dwarfs at low Galactic latitude from the DENIS database (2007)
Phan-Bao, N., Bessell, M. S., Martin, E. L., Simon, G., Borsenberger, J., Tata, R., ...
We report new nearby L and late-M dwarfs (d_phot = 3.0, later than M8.0) at low Galactic latitude (|b| < 15 degr) over 4,800 square degrees in the DENIS database. We used late-M (>=M8.0), L, and T...
HE 0557-4840 - Ultra-Metal-Poor and Carbon-Rich (2007)
Norris, John E., Christlieb, N., Korn, A. J., Eriksson, K., Bessell, M. S., Beers, Timothy C., ...
We report the discovery and high-resolution, high S/N, spectroscopic analysis of the ultra-metal-poor red giant HE 0557-4840, which is the third most heavy-element deficient star currently known. Its...
SkyMapper and the Southern Sky Survey - a resource for the southern sky (2007)
Keller, S. C., Schmidt, B. P., Bessell, M. S
SkyMapper is amongst the first of a new generation of dedicated, wide-field survey telescopes. The 1.3m SkyMapper telescope features a 5.7 square degree field-of-view Cassegrain imager and will see...
SkyMapper and the Southern Sky Survey (2007)
Keller, S. C., Schmidt, B. P., Bessell, M. S., Conroy, P. G., Francis, P., Granlund, A., ...
This paper presents the design and science goals for the SkyMapper telescope. SkyMapper is a 1.3m telescope featuring a 5.7 square degree field-of-view Cassegrain imager commissioned for the...
Chemical homogeneity in collinder 261 and implications for chemical tagging (2007)
De Silva, G. M., Freeman, K. C., Asplund, M., Bland-Hawthorn, J., Bessell, M. S., Collet, R.
Towards an Understanding of the Formation of Stars and Planets (2007)
C. W. Lee, H. W. Lee, Hwankyung Sung, I. Song, J. E. Lee, K. T. Kim, ...
The processes leading to star formation are one of main topics of research in astronomy. The area has developed rapidly during last decade, stimulated by the construction of large telescopes and the...
Chemical Homogeneity in Collinder 261 and Implications for Chemical Tagging (2006)
De Silva, G. M., Freeman, K. C., Asplund, M., Bland-Hawthorn, J., Bessell, M. S., Collet, R.
This paper presents abundances for 12 red giants of the old open cluster Collinder 261 based on spectra from VLT/UVES. Abundances were derived for Na, Mg, Si, Ca, Mn, Fe, Ni, Zr and Ba. We find the...
Chemically Tagging the HR1614 Moving Group (2006)
De Silva, G. M., Freeman, K. C., Bland-Hawthorn, J., Asplund, M., Bessell, M. S.
We present abundances for a sample of F,G,K dwarfs of the HR1614 moving group based on high resolution, high S/N ratio spectra from AAT/UCLES. Our sample includes stars from Feltzing & Holmberg...
The Carina-Near Moving Group (2006)
Zuckerman, B., Bessell, M. S., Song, Inseok, Kim, S.
We identify a group of ~20 co-moving, mostly southern hemisphere, ~200 Myr old stars near Earth. Of the stars likely to be members of this Carina-Near Moving Group, in either its nucleus (~30 pc from...
Frebel, A., Christlieb, N., Norris, J. E., Beers, T. C., Bessell, M. S., Rhee, J., ...
We present a sample of 1777 bright (9
Song, Inseok, Schneider, G., Zuckerman, B., Farihi, J., Becklin, E. E., Bessell, M. S., ...
Multi-band (0.9 to 1.6 um) images of the TW Hydrae Association (TWA) brown dwarf, 2MASS J1207334-393254 (also known as 2M1207), and its candidate planetary mass companion (2M1207b) were obtained on...
Lyo, A-Ran, Song, Inseok, Lawson, Warrick A., Bessell, M. S., Zuckerman, B.
We report the outcome of the deep optical/infrared photometric survey of the central region (33 X 33 arcmin or 0.9 pc^2) of the eta Chamaeleontis pre-main sequence star cluster. The completeness...
Discovery of a nearby M9 dwarf (2005)
Phan-Bao, N., Bessell, M. S., Martin, E. L., Simon, G., Guibert, J., Forveille, T., ...
We report the discovery of a new M9.0 dwarf at only 8.2 pc, which we identified in our search for nearby ultracool dwarf (I-J >= 3.0, later than M8.0) in the DENIS database. We measure a very high...
Chemical Homogeneity in the Hyades (2005)
De Silva, G. M., Sneden, C., Paulson, D. B., Asplund, M., Bland-Hawthorn, J., Bessell, M. S., ...
We present an abundance analysis of the heavy elements Zr, Ba, La, Ce, and Nd for Hyades cluster F-K dwarfs based on high resolution, high S/N ratio spectra from Keck/HIRES. The derived abundances...
Barklem, P. S., Christlieb, N., Beers, T. C., Hill, V., Bessell, M. S., Holmberg, J., ...
We present the results of analysis of ``snapshot'' spectra of 253 metal-poor halo stars -3.8 < [Fe/H] < -1.5 obtained in the HERES survey. The spectra are analysed using an automated line profile...
A companion to AB Pic at the planet/brown dwarf boundary (2005)
Chauvin, G., Zuckerman, B., Dumas, C., Mouillet, D., Song, I., ...
We report deep imaging observations of the young, nearby star AB Pic, a member of the large Tucana-Horologium as sociation. We have detected a faint, red source 5.5" South of the star with JHK colors...
Doyle, Marianne T., O'Mara, B. J., Ross, J. E., Bessell, M. S.
The mean abundances of Mg, Si, Ca, Ti, Cr and Fe based on both strong and weak lines of Alpha Centauri A are determined by matching the observed line profiles with those synthesized from stellar...
Burstein, D., Li, Y., Freeman, K. C., Norris, J. E., Bessell, M. S., Bland-Hawthorn, J., ...
The globular cluster (GC) systems of the Milky Way and of our neighboring spiral galaxy, M31, comprise 2 distinct entities, differing in 3 respects. 1. M31 has young GCs, ages from ~100 Myr to 5 Gyr...
On the oxygen abundance of HE0107-5240 (2004)
Bessell, M. S., Christlieb, N., Gustafsson, B.
We have determined the oxygen abundance of HE0107-5240 from UV-OH lines detected in VLT/UVES spectra. Using a plane-parallel LTE model atmosphere, we derive [O/Fe] = +2.4, and a similar analysis of...
On the highly reddened members in 6 young galactic star clusters - a multiwavelength study (2003)
Kumar, Brijesh, Sagar, Ram, Sanwal, B. B., Bessell, M. S.
The spectral and reddening properties of 211 highly reddened proper motion members with $V < 15$ mag in 6 young galactic star clusters are investigated using low resolution spectroscopic, broad-band...
HE0107-5240, A Chemically Ancient Star.I. A Detailed Abundance Analysis (2003)
Christlieb, N., Gustafsson, B., Korn, A. J., Barklem, P. S., Beers, T. C., Bessell, M. S., ...
We report a detailed abundance analysis for HE0107-5240, a halo giant with [Fe/H]_NLTE=-5.3. This star was discovered in the course of follow-up medium-resolution spectroscopy of extremely metal-poor...
Probing the Low Mass Stellar End of the eta Chamaeleontis Cluster (2003)
Song, Inseok, Zuckerman, B., Bessell, M. S.
We have identified three faint new members of the eta Chamaeleontis cluster. Spectral types of the new members are estimated to be ~M5 based on their TiO band strengths and broadband colors. With an...
The DA+dMe eclipsing binary EC13471-1258: its cup runneth over...just (2003)
O'Donoghue, D., Koen, C., Kilkenny, D., Stobie, R. S., Koester, D., Bessell, M. S., ...
EC13471-1258 is a detached eclipsing binary with Porb = 3h37m, comprising a DA white dwarf and a dMe dwarf. Total eclipses of the white dwarf lasting 14 min, and a large amplitude ellipsoidal...
Lithium Depletion Boundary in a Pre-Main Sequence Binary System (2002)
Song, Inseok, Bessell, M. S., Zuckerman, B.
A lithium depletion boundary is detected in HIP 112312 (GJ 871.1 A and B), a \~12 Myr old pre-main sequence binary system. A strong (EW 300 mA) Li 6708 A absorption feature is seen at the secondary...
On the anomaly of Balmer line profiles of A-type stars. Fundamental binary systems (2002)
Smalley, B., Gardiner, R. B., Kupka, F., Bessell, M. S.
In previous work, Gardiner et al. (1999) found evidence for a discrepancy between the Teff obtained from Balmer lines with that from photometry and fundamental values for A-type stars. An...
Smith, V. V., Hinkle, K. H., Cunha, K., Plez, B., Lambert, D. L., Pilachowski, C. A., ...
High-resolution infrared spectra (R=50,000) have been obtained for twelve red-giant members of the LMC with the Gemini South 8.3-meter telescope plus Phoenix spectrometer. Quantitative chemical...
Blue Variable Stars from the MACHO database I: Photometry and Spectroscopy of the LMC sample (2002)
Keller, Stefan C., Bessell, M. S., Cook, K. H., Geha, M., Syphers, D.
We present the photometric properties of 1279 blue variable stars within the LMC. Photometry is derived from the MACHO database. The lightcurves of the sample exhibit a variety of quasi-periodic and...
Additional TWA Members? : Spectroscopic verification of kinematically selected TWA candidates (2002)
Song, Inseok, Bessell, M. S., Zuckerman, B.
We present spectroscopic measurements of the 23 new candidate members of the TW Hydrae Association from Makarov & Fabricius (2000). Based on Halpha and Li 6708 A strengths together with location on a...
Young Clusters in the Magellanic Clouds II (2000)
Keller, Stefan C., Da Costa, G. S., Bessell, M. S.
We present the results of a quantitative study of the degree of extension to the boundary of the classical convective core within intermediate mass stars. The basis of our empirical study is the...
Spectral evolution of peculiar Ic Supernova 1998bw (2000)
Stathakis, R.A., Boyle, B.J., Jones, D.H., Bessell, M.S., Germany, Lisa M. (et Al.)
Supernova 1998bw holds the record for the most energetic Type Ic explosion, one of the brightest radio supernovae and probably the first supernova associated with a -ray burst. In this paper we...
Spectral evolution of peculiar Ic Supernova 1998bw (2000)
Stathakis, R.A., Boyle, B.J., Jones, D.H., Bessell, M.S., Germany, Lisa M. (et Al.)
Supernova 1998bw holds the record for the most energetic Type Ic explosion, one of the brightest radio supernovae and probably the first supernova associated with a -ray burst. In this paper we...
Spectral Evolution of the Peculiar Ic Supernova 1998bw (2000)
Stathakis, R. A., Boyle, B. J., Jones, D. H., Bessell, M. S., Galama, T. J., Germany, Lisa M., ...
SN 1998bw holds the record for the most energetic Type Ic explosion, one of the brightest radio supenovae and probably the first supernova associated with a gamma-ray burst. In this paper we present...
Spectral evolution of peculiar Ic Supernova 1998bw (2000)
Stathakis, R.A., Boyle, B.J., Jones, D.H., Bessell, M.S., Germany, Lisa M. (et Al.)
Supernova 1998bw holds the record for the most energetic Type Ic explosion, one of the brightest radio supernovae and probably the first supernova associated with a -ray burst. In this paper we...
Spectral evolution of peculiar Ic Supernova 1998bw (2000)
Stathakis, R.A., Boyle, B.J., Jones, D.H., Bessell, M.S., Germany, Lisa M. (et Al.)
Supernova 1998bw holds the record for the most energetic Type Ic explosion, one of the brightest radio supernovae and probably the first supernova associated with a -ray burst. In this paper we...
Spectral evolution of peculiar Ic Supernova 1998bw (2000)
Stathakis, R.A., Boyle, B.J., Jones, D.H., Bessell, M.S., Germany, Lisa M. (et Al.)
Supernova 1998bw holds the record for the most energetic Type Ic explosion, one of the brightest radio supernovae and probably the first supernova associated with a -ray burst. In this paper we...
Spectral evolution of the peculiar Ic supernova 1998bw (2000)
Stathakis, R. A., Boyle, B. J., Jones, D. H., Bessell, M. S., Galama, T. J., Germany, L. M., ...
Supernova 1998bw holds the record for the most energetic Type Ic explosion, one of the brightest radio supernovae and probably the first supernova associated with a y-ray burst. In this paper we...
Spectral evolution of the peculiar Ic supernova 1998bw (2000)
Stathakis, R. A., Boyle, B. J., Jones, D. H., Bessell, M. S., Galama, T. J., Germany, L. M., ...
Supernova 1998bw holds the record for the most energetic Type Ic explosion, one of the brightest radio supernovae and probably the first supernova associated with a y-ray burst. In this paper we...
Spectral evolution of peculiar Ic Supernova 1998bw (2000)
Stathakis, R.A., Boyle, B.J., Jones, D.H., Bessell, M.S., Germany, Lisa M. (et Al.)
Supernova 1998bw holds the record for the most energetic Type Ic explosion, one of the brightest radio supernovae and probably the first supernova associated with a -ray burst. In this paper we...
WFPC2 Imaging of Young Clusters in the Magellanic Clouds (1999)
Keller, Stefan C., Bessell, M. S., Da Costa, G. S.
We have carried out Wide Field Planetary Camera 2 F160BW, F555W and F656N imaging of four young populous clusters: NGC 330 in the Small Magellanic Cloud and NGC 1818, NGC 2004 and NGC 2100 in the...
PSR J0045-7319: A DUAL-LINE BINARY RADIO PULSAR (1995)
Bell, J. F., Bessell, M. S., Stappers, B. W., Bailes, M., Kaspi, V. M.
Binary radio pulsars are superb tools for mapping binary orbits, because of the precision of the pulse timing method (Taylor and Weisberg 1989). To date, all orbital parameters for binary pulsars...