BPM 37093: the way to the Interior of Crystallized Stars

Details BPM 37093: the way to the Interior of Crystallized Stars BPM 37093: the way to the Interior of Crystallized Stars

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998balta...7..183k&link_type=abstract

Baltic Astronomy, v.7, p.183-196.

Astronomy and Astrophysics

Astronomy

5

Stars: White Dwarfs, Variables, Crystallization, Individual: Bpm 37093

Scientific paper

BPM 37093 is a ZZ Ceti type star of the mass ~ 1.1 M_sun. Its temperature ( ~ 11 000 K) and high mass imply that it should be crystallized throughout most of its core, the exact fraction depending on the core composition. BPM 37093 is the first object where the results of crystallization theory can be probed observationally. If the star is crystallized, its pulsation spectrum should differ significantly from non-crystallized pulsating stars. Very high signal-to-noise high speed photometry will enable us to detect very low amplitude (<1 mmag) modes. The finding of additional pulsation modes will enable us to better disentangle competing physical processes such as the surface layer masses from the effects of crystallization itself. In this paper we report the observations of BPM 37093 from 1991 till 1997 and present the plan for WET observations in 1998.

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