Accreting Pulsating White Dwarfs in Cataclysmic Variables

Details Accreting Pulsating White Dwarfs in Cataclysmic Variables Accreting Pulsating White Dwarfs in Cataclysmic Variables

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007hst..prop11163s&link_type=abstract

HST Proposal ID #11163. Cycle 16

Computer Science

Scientific paper

Recent ground-based observations have increased the number of known pulsating white dwarfs in close binaries with active mass transfer cataclysmic variables from 5 to 11 systems. Our past Cycles 8 and 11 STIS observations of the first 2 known, followed by our Cycle 13 SBC observations of the next 3 discovered, revealed the clear presence of the white dwarf and increased amplitude of the pulsations in the UV compared to the optical. The temperatures derived from the UV spectra show 4 systems are much hotter than non-interacting pulsating white dwarfs. A larger sample is needed to sort out the nature of the instability strip in accreting pulsators i.e. whether effects of composition and rotation due to accretion result in a well-defined instability strip as a function of Teff.;

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