A Pulsational Study of Crystallized White Dwarf Stars

Details A Pulsational Study of Crystallized White Dwarf Stars A Pulsational Study of Crystallized White Dwarf Stars

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998balta...7..197m&link_type=abstract

Baltic Astronomy, v.7, p.197-201.

Astronomy and Astrophysics

Astronomy

1

Stars: White Dwarfs, Oscillations, Evolution, Dense Matter -, Equation Of State

Scientific paper

The DAV BPM 37093 should have a substantially crystallized core based on its mass and temperature. Using this as a motivation, we examine the way in which a crystalline interior affects the nonradial g-mode frequencies of a white dwarf star. We confine ourselves to a relatively massive model within the DA instability strip (M_⋆ = 1.1Msun), since crystallization in this temperature range should be important only for high-mass white dwarfs. We find that crystallization has a significant effect on the mean period spacing of adjacent radial overtones, of order 10--30 %. Thus, a correct pulsational treatment of crystallization is vital if we are to make reliable asteroseismological measurements of a given stars' properties.

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