New Pulsating DB White Dwarf Stars from the Sloan Digital Sky Survey

Details New Pulsating DB White Dwarf Stars from the Sloan Digital Sky Survey New Pulsating DB White Dwarf Stars from the Sloan Digital Sky Survey

2008-09-04

arxiv.org/abs/0809.0921v1

Astrophys.J.690:560-565,2009

Astronomy and Astrophysics

Astrophysics

15 pages, 2 figures, 3 tables, ApJ accepted

Scientific paper

10.1088/0004-637X/690/1/560

We are searching for new He atmosphere white dwarf pulsators (DBVs) based on the newly found white dwarf stars from the spectra obtained by the Sloan Digital Sky Survey. DBVs pulsate at hotter temperature ranges than their better known cousins, the H atmosphere white dwarf pulsators (DAVs or ZZ Ceti stars). Since the evolution of white dwarf stars is characterized by cooling, asteroseismological studies of DBVs give us opportunities to study white dwarf structure at a different evolutionary stage than the DAVs. The hottest DBVs are thought to have neutrino luminosities exceeding their photon luminosities (Winget et al. 2004), a quantity measurable through asteroseismology. Therefore, they can also be used to study neutrino physics in the stellar interior. So far we have discovered nine new DBVs, doubling the number of previously known DBVs. Here we report the new pulsators' lightcurves and power spectra.

Affiliated with

Also associated with

No associations

Rating

New Pulsating DB White Dwarf Stars from the Sloan Digital Sky Survey does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with New Pulsating DB White Dwarf Stars from the Sloan Digital Sky Survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New Pulsating DB White Dwarf Stars from the Sloan Digital Sky Survey will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-658465