PI: Heather Osborne, New Mexico State University, firstname.lastname@example.org
Address: Department of Astronomy, Box 30001/MSC 4500, Las Cruces, NM 88003, USA
CoI: Tom Harrison, New Mexico State University
Title: CV Secondary Star Masses: The Return to Photometry
Abstract: It has become clear that our understanding of the nature and evolutionary history of cataclysmic variable (CV) stars is incomplete. Pinsonneault et. al. (2002) have suggested a bimodal distribution for CV secondary stars which could cause chemical abundance anomalies (other possible causes mentioned below). Testing these theories requires knowledge of CV system parameters and chemical abundances. Using infrared spectroscopy (OSIRIS and the IRTF's SPEX), Harrison et al.(2002) have identified several CVs with peculiar abundances (levels of ^\rm 13C enhancement yielding ^\rm 12C/^\rm 13C ratios of 3; normal is 89!). More information is needed to determine the reason for these anomalies. To help solve these problems, we must better understand CV system properties. One crucial parameter we require for \it both components in these systems is mass. System orbital inclinations, used with optical, phase-resolved radial velocity data, will yield this information. We request two runs of four nights apiece with SQIID to measure the infrared ellipsoidal variations of thirteen secondary stars with periods between three and ten hours, allowing us to derive their orbital inclinations.
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