Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Rohrmann, R. D."'
White dwarf evolution is essentially a gravothermal cooling process, which,for cool white dwarfs, sensitively depends on the treatment of the outer boundary conditions. We provide detailed outer boundary conditions appropriate for computing the evolu
Externí odkaz:
http://arxiv.org/abs/1209.2452
Publikováno v:
The Astrophysical Journal Letters, 2011, Volume 743, Number 2, L33
We argue that NSV 11749, an eruption observed in the early twentieth century, was a rare event known as "very late thermal pulse" (VLTP). To support our argument we compare the lightcurve of NSV 11749 with those of the two bonafide VLTP objects known
Externí odkaz:
http://arxiv.org/abs/1111.2333
Kowalski & Saumon (2006) identified the missing absorption mechanism in the observed spectra of cool white dwarf stars as the Ly-alpha red wing formed by the collisions between atomic and molecular hydrogen and successfully explained entire spectra o
Externí odkaz:
http://arxiv.org/abs/1009.3254
Autor:
Althaus, L. G., Panei, J. A., Bertolami, M. M. Miller, García-Berro, E., Córsico, A. H., Romero, A. D., Kepler, S. O., Rohrmann, R. D.
Publikováno v:
Astrophys.J.704:1605-1615,2009
We present full evolutionary calculations appropriate for the study of hot hydrogen-deficent DO white dwarfs, PG 1159 stars, and DB white dwarfs. White dwarf sequences are computed for a wide range of stellar masses and helium envelopes on the basis
Externí odkaz:
http://arxiv.org/abs/0909.2689
Autor:
Althaus, L. G., Panei, J. A., Romero, A. D., Rohrmann, R. D., Córsico, A. H., García-Berro, E., Bertolami, M. M. Miller
Motivated by the recent detection of single and binary He-core white dwarfs in metal-rich clusters, we present a full set of evolutionary calculations and colors appropriate for the study of such white dwarfs. The paper is also aimed at investigating
Externí odkaz:
http://arxiv.org/abs/0905.1939
We present evolutionary calculations and colors for massive white dwarfs with oxygen-neon cores for masses between 1.06 and 1.28 Mo. The evolutionary stages computed cover the luminosity range from log(L/Lo) approx. 0.5 down to -5.2. Our cooling sequ
Externí odkaz:
http://arxiv.org/abs/astro-ph/0702024
Publikováno v:
Mon.Not.Roy.Astron.Soc.366:1520-1528,2006
Splaver and coworkers have measured the masses of the white dwarf and the neutron star components of the PSR J1713+0747 binary system pair by Shapiro Delay. We attempt to find the original configuration of this system performing a set of binary evolu
Externí odkaz:
http://arxiv.org/abs/astro-ph/0610169
Autor:
Rohrmann, R. D., Zorec, J.
Publikováno v:
Phys.Rev.E74:041120,2006
The new mathematical framework based on the free energy of pure classical fluids presented in [R. D. Rohrmann, Physica A 347, 221 (2005)] is extended to multi-component systems to determine thermodynamic and structural properties of chemically comple
Externí odkaz:
http://arxiv.org/abs/cond-mat/0609598
Publikováno v:
Astron.Astrophys. 451 (2006) 147-155
The present paper focuses on the evolution of hydrogen-deficient white dwarfs with the aim of exploring the consequences of different initial envelope structures on the carbon abundances expected in helium-rich, carbon-contaminated DQ white dwarfs. I
Externí odkaz:
http://arxiv.org/abs/astro-ph/0602196
Autor:
Rohrmann, R. D.
An equilibrium theory of classical fluids based on the space distribution among the particles is derived in the framework of the energy minimization method. This study is motivated by current difficulties of evaluation of optical properties in atmosp
Externí odkaz:
http://arxiv.org/abs/cond-mat/0408098