Mass-radius relations for massive white dwarf stars Autores: (Deberán ingresarse en el orden en que figuran en la publicación) * Mass-radius relations for massive white dwarf stars

L. G. ALTHAUS; E. GARCÍA-BERRO; J. ISERN; A. H. CÓRSICO

ASTRONOMY AND ASTROPHYSICS

EDP Sciences

Lugar: Les Ulis, France; Año: 2005 vol. 441 p. 689 - 694

0004-6361

We present  detailed  theoretical  mass-radius relations for massive  white  dwarf stars  with  oxygen-neon  cores.   This work  is motivated  by recent  observational  evidence about  the existence  of white dwarf stars  with very high surface gravities.   Our results are based on evolutionary calculations that take into account the chemical composition expected  from the  evolutionary history of  massive white dwarf  progenitors. We present  theoretical mass-radius  relations for stellar mass values ranging from 1.06 to 1.30 Mo with a step of  0.02 Mo and effective  temperatures from  150000 K to approx. 5000 K.   A novel aspect predicted by  our calculations is that  the  mass-radius relation  for  the  most  massive white  dwarfs exhibits a  marked dependence  on the neutrino  luminosity.  Extensive tabulations for  massive white dwarfs,  accessible from our  web site, are presented as well.