NOAO >   Observing Info >   Approved Programs >   2011A-0143

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Proposal Information for 2011A-0143


PI: Paula Szkody, University of Washington, szkody@astro.washington.edu
Address: Astronomy Department, Box 351580, Seattle, WA 98195, USA

CoI: Anjum Mukadam, University of Washington
CoI: Steve Howell, NOAO

Title: Observations of Accreting White Dwarf Pulsators

Abstract: Pulsating white dwarfs are an important group to study as pulsation modes in white dwarfs penetrate the inner 99% of the star and accreting pulsating white dwarfs then allow the effects of mass transfer, rotation and accretion on the internal structure to be studied. At the current time, there are 13 known accreting pulsating white dwarfs existing in cataclysmic variables. Our past work in the UV and optical has shown that the instability strip for these objects is wider than for single pulsators and that the pulsations can sometimes disappear due to heating from mass accretion events. However, there are a few cases where the pulsations have stopped for unknown reasons. We propose to follow the pulsation modes of 3 known accreting pulsators (one of which had an outburst 3 years ago) to ascertain the changes on yearly and daily timescales.


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NOAO >   Observing Info >   Approved Programs >   2011A-0143

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