Publications
of the
MPIfR
Optical & Infrared
Interferometry Group
T. Driebe, D. Schönberner, T. Blöcker
and F. Herwig:
Evolutionary Models of White Dwarfs with
Helium Cores
Proceedings of 11th European Workshop on
White Dwarfs,
ASP Conf. Series 169, J.-E. Solheim & E.G. Meistas (eds.), pp.
394-399 (1999)
Abstract. We present seven evolutionary tracks
for low-mass white dwarfs with helium cores, ranging in mass from 0.179
to 0.414 Msol. We generated the pre-white dwarf models from a 1 Msol
sequence extending up to the tip of its red-giant branch by applying
high mass-loss rates at appropriate positions, and we followed their
evolution across the Hertzsprung-Russell diagram and down the cooling
path.
We discuss the internal structures and cooling properties of these new
models and compare them with those of recently published models for
low-mass white dwarfs which are based on simplified initial
configurations. We also demonstrate that our new models seem to remove
the apparent discrepancies between the characteristic ages of
millisecond pulsars and the cooling ages of their white dwarf
companions.
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