Determination Of Short-period CV Population Distribution Using PTF

Details Determination Of Short-period CV Population Distribution Using PTF Determination Of Short-period CV Population Distribution Using PTF

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541612l&link_type=abstract

American Astronomical Society, AAS Meeting #215, #416.12; Bulletin of the American Astronomical Society, Vol. 42, p.268

Astronomy and Astrophysics

Astronomy

Scientific paper

Theoretical population distributions for short period Cataclysmic Variables (CVs) have exceeded the population distributions determined from observational evidence. Observational population distributions for AM Canum Venaticorum (AM CVn) binaries (ultra-compact, helium-rich, hydrogen-poor WD binaries) have yielded ten times fewer systems than theoretical distributions. Similarly, although theoretical population distributions for CVs have predicted that 99% of all CVs should have P < 70 minutes, few CVs have been found with a period this short, and certainly not 99%.
Current observational population distributions have primarily been calculated from the SDSS spectroscopic catalog. However, it is also possible to obtain a population distribution of short-period CVs by searching for eclipsing systems. We have begun to use the Palomar Transient Factory, a synoptic survey using the Palomar 48 inch telescope, with a high-cadence setting to search for these eclipsing systems. We anticipate detecting approximately 6% of short-period systems, given our observation program and the prevalence of eclipsing systems. We present our observation methods as well as initial data obtained from our first observations with PTF.

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