Journal Article

Cooling curves and chemical evolution curves of convective mixing white dwarf stars

Eugene Y. Chen and Brad M. S. Hansen

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 413, issue 4, pages 2827-2837
Published in print June 2011 | ISSN: 0035-8711
Published online May 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.18355.x
Cooling curves and chemical evolution curves of convective mixing white dwarf stars

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We present theoretical analysis on old white dwarf stars with intermediate amount of hydrogen. The evolution of such objects is complicated by convective mixing from surface convection zone to the underlying helium layer. In this paper, we provide first self-consistent, quantitative investigation of convective mixing in white dwarf stars. Numerical cooling curves and chemical evolution curves are obtained as a function of white dwarf mass and hydrogen content. Such results will be applied to the investigation of the non-DA gap of Bergeron et al. in a later paper.

Keywords: convection; diffusion; methods: numerical; stars: atmospheres; stars: evolution; white dwarfs

Journal Article.  6995 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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