Sinking of Ne-22 in Liquid White Dwarf Interiors

Details Sinking of Ne-22 in Liquid White Dwarf Interiors Sinking of Ne-22 in Liquid White Dwarf Interiors

2002-09-12

arxiv.org/abs/astro-ph/0209248v1

Astronomy and Astrophysics

Astrophysics

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

Scientific paper

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.

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