SIMBAD references

2008ApJ...688L..95B - Astrophys. J., 688, L95-L98 (2008/December-1)

Two new variable hot DQ stars.

BARLOW B.N., DUNLAP B.H., ROSEN R. and CLEMENS J.C.

Abstract (from CDS):

We have discovered periodic variations in the light curves of two hot DQ stars from the Sloan Digital Sky Survey, SDSS J220029.08-074121.5 and SDSS J234843.30-094245.3. These are the second and third variables detected among the hot DQs and confirm the existence of a new class of variable white dwarf stars. The amplitudes of the variations are one half as large as those detected in the first discovered variable, SDSS J142625.71+575218.3, and required high signal-to-noise photometry to detect. The pulse shapes of the stars are not like those of known white dwarf pulsators but are similar to the first hot DQ variable, SDSS J142625.71+575218.3.

Abstract Copyright:

Journal keyword(s): Stars: Oscillations - Stars: Variables: Other - Stars: White Dwarfs

Simbad objects: 5

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