Sinking of Ne-22 in Liquid White Dwarf Interiors

Christopher J. Deloye; Lars Bildsten

Sinking of Ne-22 in Liquid White Dwarf Interiors

Astrophysics 2007-05-23 v1

Authors: Christopher J. Deloye , Lars Bildsten

Abstract

We assess the impact of the trace element Ne-22 on the cooling and seismology of a liquid C/O white dwarf (WD). Due to this element's neutron excess, it sinks towards the interior as the liquid WD cools. The gravitational energy released slows the WD's cooling by 0.5-1.6 Gyr. In addition the Ne-22 abundance gradient changes the periods of the high radial order g-modes at the 1% level.

Keywords

white dwarf cooling seismology Ne-22 gravitational settling

Cite

@article{arxiv.astro-ph/0209248,
  title  = {Sinking of Ne-22 in Liquid White Dwarf Interiors},
  author = {Christopher J. Deloye and Lars Bildsten},
  journal= {arXiv preprint arXiv:astro-ph/0209248},
  year   = {2007}
}

Comments

4 pages, 2 figures, to appear in the Proceedings of the 13th European Workshop on White Dwarfs

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