A. Burkert

Details der Publikationsliste

Zeitraum

1988 - 2009

Anzahl

110

Co-Autoren

[The Impact of Nuclear Star Formation on Gas Inflow to AGN (2009)

Davies, R. I., Hicks, E., Schartmann, M., Genzel, R., Tacconi, L. J., Engel, H., ...

Our adaptive optics observations of nearby AGN at spatial resolutions as small as 0.085arcsec show strong evidence for recent, but no longer active, nuclear star formation. We begin by describing...

Protostellar discs formed from turbulent cores (2009)

Walch, S., Naab, T., Burkert, A., Whitworth, A., Gritschneder, M.

We investigate the collapse and fragmentation of low-mass, trans-sonically turbulent prestellar cores, using SPH simulations. The initial conditions are slightly supercritical Bonnor-Ebert spheres,...

A Deep Hubble Space Telescope H-Band Imaging Survey of Massive Gas-Rich Mergers. II. The QUEST QSOs (2009)

Veilleux, S., Rupke, D. S. N., Peng, C. Y., Tacconi, L. J., Genzel, R., ...

We report the results from a deep Hubble Space Telescope (HST) NICMOS H-band imaging survey of 28 z < 0.3 QSOs from the Palomar-Green (PG) sample. This program is part of QUEST (Quasar/ULIRG...

High-Redshift Star-Forming Galaxies: Angular Momentum and Baryon Fraction, Turbulent Pressure Effects and the Origin of Turbulence (2009)

Burkert, A., Genzel, R., Bouche, N., Cresci, G., Khochfar, S., Sommer-Larsen, J., ...

The structure of a sample of high-redshift (z=2), rotating galaxies with high star formation rates and turbulent gas velocities of sigma=40-80 km/s is investigated. Fitting the observed disk...

A Deep HST H-Band Imaging Survey of Massive Gas-Rich Mergers. II. The QUEST PG QSOs (2009)

Veilleux, S., Rupke, D. S. N., Peng, C. Y., Tacconi, L. J., Genzel, R., ...

We report the results from a deep HST NICMOS H-band imaging survey of 28 z < 0.3 QSOs from the Palomar-Green (PG) sample. This program is part of QUEST (Quasar / ULIRG Evolution STudy) and...

The SINS survey: modeling the dynamics of z~2 galaxies and the high-z Tully-Fisher relation (2009)

Cresci, G., Hicks, E. K. S., Genzel, R., Schreiber, N. M. Foerster, Davies, R., Bouche', N., ...

We present the modeling of SINFONI integral field dynamics of 18 star forming galaxies at z ~ 2 from Halpha line emission. The galaxies are selected from the larger sample of the SINS survey, based...

Astrophysics with Radioactive Atomic Nuclei (2009)

Diehl, R., Von Ballmoos, P., Boggs, S., Burkert, A., Chieffi, A., Gehrels, N., ...

We propose to advance investigations of electromagnetic radiation originating in atomic nuclei beyond its current infancy to a true astronomy. This nuclear emission is independent from conditions of...

The formation and early evolution of protostellar disks - I. Collapse of rigidly rotating prestellar cores (2009)

Walch, S., Burkert, A., Naab, T., Gritschneder, M.

An unambiguous link between star forming taking place within cold and dark molecular cloud cores and the initial core conditions is still missing. Therefore we investigate the collapse of low-mass...

The flattening and the orbital structure of early-type galaxies and collisionless N-body binary disk mergers (2008)

Thomas, J., Jesseit, R., Saglia, R. P., Bender, R., Burkert, A., Corsini, E. M., ...

We use oblate axisymmetric dynamical models including dark halos to determine the orbital structure of intermediate mass to massive Coma early-type galaxies. We find a large variety of orbital...

From Rings to Bulges: Evidence for Rapid Secular Galaxy Evolution at z ~ 2 from Integral Field Spectroscopy in the SINS Survey (2008)

Genzel, R., Burkert, A., Bouché, N., Cresci, G., Förster Schriber, N. M., Shapley, A., ...

We present Hα integral field spectroscopy of well-resolved, UV/optically selected z ~ 2 star-forming galaxies as part of the SINS survey with SINFONI on the ESO VLT. Our laser guide star adaptive...

Kinematics of planetary nebulae in the outskirts of the elliptical galaxy NGC 4697 (2008)

Mendez, R. H., Teodorescu, A. M., Burkert, A.

We describe the implementation of slitless radial velocity measurements of extragalactic planetary nebulae (PNs) with the 8.2 m Subaru telescope and its Cassegrain imaging spectrograph, FOCAS. As a...

iVINE - Ionization in the parallel tree/SPH code VINE: First results on the observed age-spread around O-stars (2008)

Gritschneder, M., Naab, T., Burkert, A., Walch, S., Heitsch, F., Wetzstein, M.

We present a three-dimensional, fully parallelized, efficient implementation of ionizing UV radiation for smoothed particle hydrodynamics (SPH) including self-gravity. Our method is based on the...

From rings to bulges: evidence for rapid secular galaxy evolution at z~2 from integral field spectroscopy in the SINS survey (2008)

Genzel, R., Burkert, A., Bouche, N., Cresci, G., Schreiber, N. M. Foerster, Shapley, A., ...

We present Ha integral field spectroscopy of well resolved, UV/optically selected z~2 star-forming galaxies as part of the SINS survey with SINFONI on the ESO VLT. Our laser guide star adaptive...

Fragmentation of Shocked Flows: Gravity, Turbulence and Cooling (2008)

Heitsch, F., Hartmann, L., Burkert, A.

The observed rapid onset of star formation in molecular clouds requires rapid formation of dense fragments which can collapse individually before being overtaken by global gravitationally-driven...

VINE -- A numerical code for simulating astrophysical systems using particles I: Description of the physics and the numerical methods (2008)

Wetzstein, M., Nelson, Andrew F., Naab, T., Burkert, A.

We present a Fortran 95 code for simulating the evolution of astrophysical systems using particles to represent the underlying fluid flow. The code is designed to be versatile, flexible and...

1 (2007)

C. R. O'dell, B. Balick, A. R. Hajian, A. Burkert

Hemos estudiado las nebulosas planetarias brillantes mas cercanas con el WFPC2 del Telescopio Espacial Hubble para caracterizar los nudos densos que existen en NGC 7293. Encontramos nudos en todos...

Axisymmetric orbit models of N-body merger remnants: a dependency of reconstructed mass on viewing angle (2007)

Thomas, J., Jesseit, R., Naab, T., Saglia, R. P., Burkert, A., Bender, R.

We model mock observations of collisionless N-body disc-disc mergers with an axisymmetric orbit superposition program that has been used to model Coma ellipticals. The remnants sample...

On gas drag in a circular binary system (2007)

Ciecielag, P., Ida, S., Gawryszczak, A., Burkert, A.

We investigate both analytically and numerically the motion of massless particles orbiting primary star in a close circular binary system with particular focus on the gas drag effects. These are the...

Magnetized Non-linear Thin Shell Instability: Numerical Studies in 2D (2006)

Heitsch, F., Slyz, A. D., Devriendt, J. E. G., Hartmann, L., Burkert, A.

We revisit the analysis of the Non-linear Thin Shell Instability (NTSI) numerically, including magnetic fields. The magnetic tension force is expected to work against the main driver of the NTSI --...

Cloud Dispersal in Turbulent Flows (2006)

Heitsch, F., Slyz, A. D., Devriendt, J. E. G., Burkert, A.

Cold clouds embedded in warm media are very common objects in astrophysics. Their disruption timescale depends strongly on the dynamical configuration. We discuss the evolution of an initially...

Triggered Star Formation in the Environment of Young Massive Stars (2006)

Gritschneder, M., Naab, T., Heitsch, F., Burkert, A.

Recent observations with the Spitzer Space Telescope show clear evidence that star formation takes place in the surrounding of young massive O-type stars, which are shaping their environment due to...

Dynamical properties of Ultraluminous Infrared Galaxies. II. Traces of dynamical evolution and end products of local ultraluminous mergers (2006)

Dasyra, K. M., Tacconi, L. J., Davies, R. I., Naab, T., Genzel, R., Lutz, D., ...

We present results from our Very Large Telescope large program to study the dynamical evolution of local Ultraluminous Infrared Galaxies (ULIRGs) and QSOs. This paper is the second in a series...

The Birth of Molecular Clouds: Formation of Atomic Precursors in Colliding Flows (2006)

Heitsch, F., Slyz, A. D., Devriendt, J. E. G., Hartmann, L. W., Burkert, A.

Molecular Cloud Complexes (MCCs) are highly structured and ``turbulent''. Observational evidence suggests that MCCs are dynamically dominated systems, rather than quasi-equilibrium entities. The...

The Fragmentation of Cores and the Initial Binary Population (2006)

Goodwin, S. P., Kroupa, P., Goodman, A., Burkert, A.

Almost all young stars are found in multiple systems. This suggests that protostellar cores almost always fragment into multiple objects. The observed properties of multiple systems such as their...

How galaxies lose their angular momentum (2006)

D'Onghia, E., Burkert, A., Murante, G., Khochfar, S.

The processes are investigated by which gas loses its angular momentum during the protogalactic collapse phase, leading to disk galaxies that are too compact with respect to the observations....

Do dwarf galaxies form in tidal tails? (2005)

Wetzstein, M., Naab, T., Burkert, A.

The formation of tidal dwarf galaxies (TDG) inside tidal arms of interacting disk galaxies has been studied with N-body and N-body/SPH simulations at different resolutions. In pure N-body simulations...

Dynamical properties of Ultraluminous Infrared Galaxies I: Mass ratio conditions for ULIRG activity in interacting pairs (2005)

Dasyra, K. M., Tacconi, L. J., Davies, R. I., Genzel, R., Lutz, D., Naab, T., ...

We present first results from our Very Large Telescope large program to study the dynamical evolution of Ultraluminous Infrared Galaxies (ULIRGs), which are the products of mergers of gas-rich...

The dwarf galaxy DDO 47: testing cusps hiding in triaxial halos (2005)

Gentile, G., Burkert, A., Salucci, P., Klein, U., Walter, F.

We present HI data of the dwarf galaxy DDO 47, aimed at testing the hypothesis that dark halo triaxiality might induce non-circular motions resulting in rotation curves best fitted by cored halos,...

Evolution of local Ultraluminous mergers from NIR spectroscopy (2005)

Dasyra, K. M., Tacconi, L. J., Davies, R. I., Genzel, R., Lutz, D., Naab, T., ...

We present results from our VLT Large Program to study the dynamical evolution of Ultraluminous Infrared Galaxies (ULIRGs). We have so far obtained near-infrared high-resolution ISAAC spectra of 53...

Formation of Structure in Molecular Clouds: A Case Study (2005)

Heitsch, F., Burkert, A., Hartmann, L., Slyz, A. D., Devriendt, J. E. G.

Molecular clouds (MCs) are highly structured and ``turbulent''. Colliding gas streams of atomic hydrogen have been suggested as a possible source of MCs, imprinting the filamentary structure as a...

The dwarf galaxy DDO 47 as a dark matter laboratory: testing cusps hiding in triaxial halos (2005)

Gentile, G., Burkert, A., Salucci, P., Klein, U., Walter, F.

We present an analysis of high resolution HI data of the dwarf galaxy DDO 47, aimed at testing the hypothesis that dark halo triaxiality might induce non-circular motions resulting in rotation curves...

The Formation of Fossil Galaxy Groups in the hierarchical Universe (2005)

D'Onghia, E., Sommer-Larsen, J., Romeo, A. D., Burkert, A., Pedersen, K., Portinari, L., ...

We use a set of twelve high-resolution N-body/hydrodynamical simulations in the $\Lambda$CDM cosmology to investigate the origin and formation rate of fossil groups (FGs), which are X-ray bright...

Orbital Structure of Collisionless Merger Remnants: On the Origin of Photometric and Kinematic Properties of Elliptical and S0 Galaxies (2005)

Jesseit, R., Naab, T., Burkert, A.

We present a detailed investigation of the relation between the orbital content of merger remnants and observable properties of elliptical and S0 galaxies. Our analysis is based on the statistical...

Investigating the ArF laser stability of CaF2 at elevated fluences (2005)

Burkert, A., Mühlig, C., Triebel, W., Keutel, D., Natura, U., Parthier, L., ...

Combined measurements of transmission T, absorption A and total scattering TS revealed the high accuracy of all applied measurement techniques by obtaining a sum T+A+TS+R = (100±0.3)% (R denotes the...

The dwarf galaxy DDO 47 as a dark matter laboratory: Testing cusps hiding in triaxial halos (2005)

Gentile, G., Burkert, A., Salucci, P., Klein, U., Walter, F.

We present an analysis of high-resolution H I data of the dwarf galaxy DDO 47, aimed at testing the hypothesis that dark halo triaxiality might induce noncircular motions resulting in rotation curves...

Three-dimensional Continuum Radiative Transfer Images of a Molecular Cloud Core Evolution (2004)

Steinacker, J., Lang, B., Burkert, A., Bacmann, A., Henning, Th.

We analyze a three-dimensional smoothed particle hydrodynamics simulation of an evolving and later collapsing pre-stellar core. Using a three-dimensional continuum radiative transfer program, we...

Monte Carlo simulations of the halo white dwarf population (2004)

Garcia-Berro, E., Torres, S., Isern, J., Burkert, A.

The interpretation of microlensing results towards the Large Magellanic Cloud (LMC) still remains controversial. Whereas white dwarfs have been proposed to explain these results and, hence, to...

The tilt of the fundamental plane: Three-quarters structural nonhomology, one-quarter stellar population (2004)

Trujillo, I., Burkert, A., Bell, Eric. F.

The variation of the mass-to-light M/L ratios of early-type galaxies as a function of their luminosities L is investigated. It is shown that the tilt ‚‚beta;=0.27 (in the B band) of the fundamental...

Monte Carlo simulations of the halo white dwarf population (2004)

García-Berro, E., Torres, S., Isern, J., Burkert, A.

The interpretation of microlensing results towards the Large Magellanic Cloud (LMC) still remains controversial. While white dwarfs have been proposed to explain these results and, hence, to...

Three-dimensional continuum radiative transfer images of a molecular cloud core evolution (2004)

Steinacker, J., Lang, B., Burkert, A., Bacmann, A., Henning, Th.

We analyze a three-dimensional smoothed particle hydrodynamics simulation of an evolving and later collapsing prestellar core. Using a three-dimensional continuum radiative transfer program, we...

The Tilt of the Fundamental Plane: Three-quarters Structural Nonhomology, One-quarter Stellar Population (2003)

Trujillo, I., Burkert, A., Bell, Eric. F.

The variation of the mass-to-light ratios M/L of early type galaxies as function of their luminosities L is investigated. It is shown that the tilt beta=0.27 (in the B--band) of the fundamental plane...

Orbital Parameters of Merging Dark Matter Halos (2003)

Khochfar, S., Burkert, A.

In order to specify cosmologically motivated initial conditions for major galaxy mergers (mass ratios $\leq$ 4:1) that are supposed to explain the formation of elliptical galaxies we study the...

Role of clusters of galaxies in the evolution of the metal budget in the Universe (2003)

Finoguenov, A., Burkert, A., Boehringer, H.

Using the guidelines on SN element production provided by XMM-Newton, we summarize the results of ASCA observations on the element abundance in groups and clusters of galaxies. We show that while the...

A model for the jet-disk connection in BH accreting systems (2003)

Hujeirat, A., Livio, M., Camenzind, M., Burkert, A.

Based on theoretical arguments and quasi-stationary radiative MHD calculations, a model for an accretion-powered jet is presented. It is argued that accretion disks around BHs consist of 1) a cold,...

Minor merger of galaxies: Theory vs. observation (2003)

Bertschik, M., Burkert, A.

High-Resolution simulations of cosmological structure formation suggest the formation of dark matter halos with strong substructure. These small clumps can spiral into the center of the massive halo...

A model for the jet-disk connection in BH [black hole] accreting systems (2003)

Hujeirat, A., Livio, M., Camenzind, M., Burkert, A.

The powerful and highly collimated jets observed in active galactic nuclei and mu -quasars are likely to be connected to the accretion phenomenon via disks. Based on theoretical arguments and...

Radiation-driven implosion of molecular cloud cores (2003)

Kessel-Deynet, O., Burkert, A.

We present the first three-dimensional calculations of radiation-driven implosion of molecular clouds, including self-gravity and ionization. We discuss the effects of initial density perturbations...

The importance of spheroidal and mixed mergers for early-type galaxy formation (2003)

Khochfar, S., Burkert, A.

We use semianalytical modeling techniques to investigate the progenitor morphologies of present-day elliptical galaxies. We find that, independent of the environment, the fraction of mergers of...

Ellipticals with disky and boxy isophotes in high density environments (2003)

Khochfar, S., Burkert, A.

We use semi-analytical modelling of galaxy formation to predict the mix of elliptical galaxies with boxy and disky isophotes, assuming they originated from major mergers of different mass ratios....

Knots in planetary nebulae (2003)

O'dell, C. R., Balick, B., Hajian, A. R., Henney, W. J., Burkert, A.

We have studied the closest bright planetary nebulae with the Hubble Space Telescope's WFPC2 in order to characterize the dense knots already known to exist in NGC 7293. We find knots in all of the...

About the morphology of dwarf spheroidal galaxies and their dark matter content (2003)

Walcher, C. J., Fried, J. W., Burkert, A., Klessen, R. S.

The morphological properties of the Carina, Sculptor and Fornax dwarfs are investigated using new wide field data with a total area of 29 square degrees. The stellar density maps are derived, hinting...

Fragmentation of tidal tails and the possible origin of tidal dwarf galaxies (2003)

Wetzstein, M., Naab, T., Burkert, A.

We investigate the formation of tidal dwarf galaxies in mergers of spiral galaxies. High resolution simulations of mergers have been run to investigate the formation of structure in the tidal arms of...

About the morphology of dwarf spheroidal galaxies and their dark matter content (2002)

Walcher, C. J., Fried, J. W., Burkert, A., Klessen, R. S.

The morphological properties of the Carina, Sculptor and Fornax dwarfs are investigated using new wide field data with a total area of 29 square degrees. The stellar density maps are derived, hinting...

Constraints of the Clumpyness of Dark Matter Halos Through Heating of the Disk Galaxies (2002)

Ardi, E., Tsuchiya, T., Burkert, A.

Motivated by the presence of numerous dark matter clumps in the Milky Way's halo as expected from the cold dark matter cosmological model, we conduct numerical simulations to examine the heating of...

Collisional Stellar Dynamics, Gas Dynamics and Special Purpose Computing (2002)

Spurzem, R., Makino, J., Fukushige, T., Lienhart, G., Kugel, A., Maenner, R., ...

Challenging stellar dynamical problems, such as the study of gravothermal oscillations in star clusters, have in the past initiated the very successful building of GRAPE special purpose computers. It...

The Validity of the Adiabatic Contraction Approximation for Dark Matter Halos (2002)

Jesseit, R., Naab, T., Burkert, A.

We use high resolution numerical simulations to investigate the adiabatic contraction of dark matter halos with a Hernquist density profile. We test the response of the halos to the growth of...

Knots in Nearby Planetary Nebulae (2002)

O'Dell, C. R., Balick, B., Hajian, A. R., Henney, W. J., Burkert, A.

HST emission-line images of five of the arguably closest planetary nebulae have shown that there is a progression of characteristics of their knots. This progression begins with dark tangential...

Forming stars on a viscous timescale: the key to exponential stellar profiles in disk galaxies? (2001)

Slyz, A., Devriendt, J., Silk, J., Burkert, A.

We argue for implementing star formation on a viscous timescale in hydrodynamical simulations of disk galaxy formation and evolution. Modelling two-dimensional isolated disk galaxies with the...

Redshift Evolution of the Merger Fraction of Galaxies in CDM Cosmologies (2001)

Khochfar, S., Burkert, A.

We use semi-analytical modelling of galaxy formation to study the redshift evolution of the galaxy merger fractions and merger ratesin Lambda CDM and quintessence (QCDM) cosmologies, their dependence...

Chemical Evolution of the Galaxy Based on the Oscillatory Star Formation History (2001)

Hirashita, H., Burkert, A., Takeuchi, T. T.

We model the star formation history (SFH) and the chemical evolution of the Galactic disk by combining an infall model and a limit-cycle model of the interstellar medium (ISM). Recent observations...

The kinematics of 3:1-merger remnants and the formation of low-luminosity elliptical galaxies (2000)

Cretton, N., Naab, T., Burkert, A.

We test the formation of low-luminosity elliptical galaxies through collisionless mergers of unequal-mass disk galaxies. The kinematic properties of a small survey of simulated merger end-products...

Ionizing Radiation in Smoothed Particle Hydrodynamics (2000)

Kessel-Deynet, O., Burkert, A.

A new method for the inclusion of ionizing radiation from uniform radiation fields into 3D Smoothed Particle Hydrodynamics (SPHI) simulations is presented. We calculate the optical depth for the...

Thermal Instability and the Formation of Clumpy Gas Clouds (2000)

Burkert, A., Lin, D. N. C.

The radiative cooling of optically thin gaseous regions and the formation of a two-phase medium and of cold gas clouds with a clumpy substructure is investigated. In optically thin clouds, the growth...

On the Formation of Boxy and Disky Elliptical Galaxies (1999)

Burkert, A., Naab, Th.

N-body simulations of major spiral-spiral mergers with different mass ratios q

Galactic Bulges from HST-NICMOS Observations: Ages and Dust (1999)

Peletier, Reynier, Balcells, Marc, Davies, Roger, Andredakis, Y., Vazdekis, A., Burkert, A., ...

We present optical and near-infrared colour maps of the central regions of bulges of S0 and spiral galaxies obtained with WFPC2 and NICMOS on the HST. By combined use of HST and ground-based data the...

Evidence for early stellar encounters in the orbital distribution of Edgeworth-Kuiper Belt objects (1999)

Ida, S., Larwood, J. D., Burkert, A.

We have investigated effects of early stellar encounters on a protoplanetary disk (planetesimal disk) and found that they can explain the high eccentricities and inclinations observed in the outer...

The origin and formation of cuspy density profiles through violent relaxation of stellar systems (1999)

Hozumi, S., Burkert, A., Fujiwara, T.

It is shown that the cuspy density distributions observed in the cores of elliptical galaxies can be realized by dissipationless gravitational collapse. The initial models consist of power-law...

Monte Carlo simulations of the disk white dwarf population (1998)

Garcia-Berro, E., Torres, S., Isern, J., Burkert, A.

In order to understand the dynamical and chemical evolution of our Galaxy it is of fundamental importance to study the local neighborhood. White dwarf stars are ideal candidates to probe the history...

Dark baryons and rotation curves (1997)

Burkert, A., Silk, J.

The best measured rotation curve for any galaxy is that of the dwarf spiralXXXX DDO 154, which extends out to about 20 disk scale lengths. It provides an ideal laboratory for testing the universal...

Protostellar fragmentation in a power-law density distribution (1997)

Burkert, A., Bate, M., Bodenheimer, P.

Hydrodynamical calculations in three space dimensions of the collapse of an isothermal, rotating 1 M\sol protostellar cloud are presented. The initial density stratification is a power law with...

Do dwarf spheroidal galaxies contain dark matter? (1996)

Burkert, A.

The amount of dark matter in the four galactic dwarf spheroidals with large mass-to-light ratios is investigated. Sextans has a cut-off radius which is equal to the expected tidal radius, assuming a...

Substructure in the Globular Cluster System of the Milky Way (1996)

Burkert, A., Smith, G.

The kinematical and spatial properties of the metal-rich globular clusters in the Galaxy ([Fe/H] > -0.8) indicates that these objects do not comprise a homogeneous population. Three subsystems are...

SNeIa: on the binary progenitors and expected statistics (1996)

Ruiz-Lapuente, P., Canal, R., Burkert, A.

A review of type Ia supernovae (SNe Ia) statistics as expected from the different scenarios and explosion models so far suggested is presented.

The origin of galactic disks with exponential z-profiles (1996)

Burkert, A., Yoshii, Y.

A new solution is presented for the puzzling, observed universality of the exponential luminosity profiles, perpendicular to the disk plane of spiral and lenticular galaxies. It is shown that such...

Dormant dwarf spheroidal galaxies, deactivated by Type Ia supernovae (1996)

Burkert, A., Ruiz-Lapuente, P.

Some dwarf spheroidal galaxies have experienced many Gyrs long periods without star formation. We show that Type Ia supernovae, formed from a first generation of stars, can delay a second epoch of...

The Single-Degenerate Scenario for Type Ia SNe in Cosmic Perspective (1995)

Canal, R., Ruiz-Lapuente, P., Burkert, A.

The occurrence and properties of Type Ia supernovae (SNe Ia) in single-degenerate binary systems (white dwarf [WD] + nondegenerate companion) is examined for galaxies of different types, and as a...

Type Ia Supernova Scenarios and the Hubble Sequence (1995)

Ruiz-Lapuente, P., Burkert, A., Canal, R.

The dependence of the Type Ia supernova (SN Ia) rate on galaxy type is examined for three currently proposed scenarios: merging of a Chandrasekhar--mass CO white dwarf (WD) with a CO WD companion,...

The Structure of Dark Matter Haloes in Dwarf Galaxies (1995)

Burkert, A.

Recent observations indicate that dark matter haloes have flat central density profiles. Cosmological simulations with non-baryonic dark matter predict however self similar haloes with central...

Step meets PREMO: Product Modelling and new Presentation Techniques (1994)

Bräckelmann, M., Burkert, A., Rix, J., Ungerer, M.

In computer graphics standardization the development of the next generation has started. Addressing new presentation techniques as well as graphics and multimedia functionality, the requirements of...

STEP and its relation to computer graphics (1993)

Rix, J., Burkert, A., Ungerer, M.

This paper presents the Initial Release of STEP in the context of Computer Graphics. After a short overview about the Initial Release of STEP, the paper evaluates those Parts of STEP of special...

Normungsaktivitäten in Graphik und CAD (1989)

Burkert, A., Froböse, L., Klement, K., Noll, S., Poller, J.

Durch die Entwicklung von Referenzmodellen für graphische Systeme und CAD-Systeme soll eine Harmonisierung und Klassifizierung der graphischen Systeme ermöglicht werden. Mit PHI-GKS wird ein...

PHI-GKS. Programmer's hierarchical interactive graphics kernel system (1988)

Burkert, A., Froboese, L., Noll, S., Poller, J., Rix, J.

GKS-3D und PHIGS, die zur Zeit wichtigsten 3D-Graphiksysteme, stehen mittlerweile kurz vor der Registrierung als internationale Standards (ISO/IEC 8805 und ISO/IEC 9592). Jedoch wird die...

Fast algorithm for polygon clipping with 3D windows (1988)

Burkert, A.

Many applications which use 3D graphics, need 3D geometric modeling and hence polygon clipping against 3D windows or general volumes. The disadvantages of existing clipping algorithms are that they...

Computer graphics and geometry standards (1988)

Burkert, A., Noll, S., Rix, J.

This paper gives a overview of the current state in the standardization areas of computer graphics and product model data exchange. The already existing standards and those under development area...