Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-04-03
Astronomy and Astrophysics
Astrophysics
Accepted for publication in ApJ (26 pages, 7 figures, aasms4)
Scientific paper
10.1086/304483
In this paper we compute detailed evolutionary models providing chemical profiles for white dwarfs having progenitors in the mass range from 1.0 to $7 M_{\sun}$ and we examine the influence of such profiles in the cooling process. The influence of the process of separation of carbon and oxygen during crystallization is decreased as a consequence of the initial stratification, but it is still important and cannot be neglected. As an example, the best fit to the luminosity functions of Liebert et al. (1988) and Oswalt et al. (1996) gives and age of the disk of 9.3 and 11.0 Gyr, respectively, when this effect is taken into account, and only 8.3 and 10.0 Gyrs when it is neglected.
Dominguez Inmaculada
Garcia-Berro Enrique
Hernanz Margarida
Isern Jordi
Mochkovitch Robert
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