Mass distribution of DA white dwarfs in the First Data Release of the Sloan Digital Sky Survey
Apr, 2004
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Abstract: (arXiv)
We investigate the sample of 1175 new nonmagnetic DA white dwarfs with the effective temperatures T_eff > 12000 K, which were extracted from the Data Release 1 of the Sloan Digital Sky Survey. We determined masses, radii, and bolometric luminosities of stars in the sample. The above parameters were derived from the effective temperatures T_eff and surface gravities log g published in the DR1, and the new theoretical M - R relations for carbon-core and oxygen-core white dwarfs. Mass distribution of white dwarfs in this sample exhibits the peak at M = 0.562 M_sol (carbon core stars), and the tail towards higher masses. Both the shape of the mass distribution function and the empirical mass - radius relation are practically identical for white dwarfs with either pure carbon or pure oxygen cores.Note:
- 4 pages, 3 figures, Astron. Astrophys. Lett. (in press)
- catalogs
- stars: fundamental parameters
- stars: white dwarfs
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