SDSS White Dwarf mass distribution at low effective temperatures

Details SDSS White Dwarf mass distribution at low effective temperatures SDSS White Dwarf mass distribution at low effective temperatures

2008-12-02

arxiv.org/abs/0812.0491v1

J.Phys.Conf.Ser.172:012006,2009

Astronomy and Astrophysics

Astrophysics

to appear in the proceedings of the 16th European Workshop on White Dwarfs, Barcelona, 2008

Scientific paper

10.1088/1742-6596/172/1/012006

The DA white dwarfs in the Sloan Digital Sky Survey, as analyzed in the papers for Data Releases 1 and 4, show an increase in surface gravity towards lower effective temperatures below 11500 K. We study the various possible explanations of this effect, from a real increase of the masses to uncertainties or deficiencies of the atmospheric models. No definite answer is found but the tentative conclusion is that it is most likely the current description of convection in the framework of the mixing-length approximation, which leads to this effect.

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