The progenitor masses and the luminosity function of white dwarfs

Details The progenitor masses and the luminosity function of white dwarfs The progenitor masses and the luminosity function of white dwarfs

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....66..453d&link_type=abstract

Astronomy and Astrophysics, vol. 66, no. 3, June 1978, p. 453-461.

Astronomy and Astrophysics

Astrophysics

21

Stellar Evolution, Stellar Luminosity, Stellar Mass, Stellar Models, White Dwarf Stars, Protostars, Stellar Spectra

Scientific paper

The dependence of the luminosity function (LF) of white dwarfs on the progenitor mass function is investigated, with the aid of some assumptions for the birthrate of main-sequence stars. When dealing with a finite disk age - about 10 billion yr for nearby stars - at low luminosity, a departure of the LF of white dwarfs is found with respect to the LF obtained if a constant birthrate and deathrate are assumed, due to the fact that low progenitor masses cannot give rise at present to very low-luminosity white dwarfs. The importance of very good knowledge of white-dwarf lifetimes and of the relation between progenitor mass and mass and chemical structure of the remnant white dwarf is stressed. A tentative explanation of hot white dwarfs of different spectral types is given in terms of different progenitor masses.

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