Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..334..107n&link_type=abstract
14th European Workshop on White Dwarfs, ASP Conference Series, Vol. 334 Proceedings of a meeting held at Kiel, July 19-23, 2004
Astronomy and Astrophysics
Astronomy
2
Scientific paper
We extracted from the Data Release 1 of the Sloan Digital Sky Survey 1175 new nonmagnetic DA white dwarfs with effective temperatures Teff ≥ 12000 K. We determined masses, radii, and bolometric luminosities of stars in the sample, based on the new theoretical M-R relations of white dwarfs with carbon cores and oxygen cores, and the effective temperatures Teff and surface gravities log g published in the DR1. Mass distribution of white dwarfs in the sample is slightly asymmetrical towards both higher and lower masses, and exhibits the peak at M = 0.562 M&sun; masses (carbon core white dwarfs). Both the shape of the mass distribution and the empirical mass-radius relation are practically identical for white dwarfs with either pure carbon or pure oxygen cores.
Althaus Leandro G.
Madej Jerzy
Nalezyty Miroslaw
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