Other
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20918207s&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #182.07; Bulletin of the American Astronomical Society,
Other
Scientific paper
Single DAV pulsating white dwarfs are known to show non-radial g-mode pulsations with periods around 50-1400s and have temperatures in the specific range of 11,000-12,500K. With the discovery of several pulsating white dwarfs in the accreting close binary systems of cataclysmic variables, it is possible to probe the effects of mass transfer and accretion, external heat input, He enriched envelopes and fast rotation on the location of the instability strip. Our UV observations of three pulsating accreting white dwarfs in the cataclysmic variables SDSSJ013132-0901, SDSSJ161033-0102 and SDSSJ220553+1155 with the Solar Blind Channel on HST show enhanced pulsation amplitudes over the optical and white dwarf temperatures near 15,000K. Combined with temperatures of two other known accreting pulsators (GW Lib and HS2331+3905), it appears that there is a wide range in the instability strip for accreting pulsators. This range may be due to different white dwarf masses or compositions compared to single DAVs. This research was supported by NASA grant GO-10233.01A from STScI.
Gaensicke Boris T.
Henden Arne A.
Mukadam Anjum
Nitta Atsuko
Prabhu T.
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