The degenerate pulsators

Details The degenerate pulsators The degenerate pulsators

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008coast.157..177f&link_type=abstract

Communications in Asteroseismology, Vol.157, p. 177-184

Mathematics

Logic

2

Scientific paper

We briefly review some of the basic properties of the three distinct families of isolated pulsating white dwarfs. These are the GW Vir stars (He/C/O-atmosphere stars with Teff ˜120,000 K), the V777 Her stars (He-atmosphere, Teff ˜25,000 K), and the ZZ Ceti stars (H-atmosphere, Teff ˜12,000 K), all showing multiperiodic luminosity variations caused by low-order and low-degree g-mode instabilities. In the light of the recent and unexpected discovery of a new type of white dwarfs, those with atmospheres dominated by carbon and found only in a narrow range of effective temperature centered around 20,000 K, we also review the asteroseismological potential of these objects. This sets the table for a discussion of the recent exciting discovery of the first pulsating C-atmosphere white dwarf, SDSS J1426+5752.

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