PI: Tom Williams, University of New Mexico, email@example.com
Address: 800 Yale Avenue SE, Albuquerque, NM 87131, USA
CoI: Todd Burdulis, University of New Mexico
Title: Radial Velocity Variables Among The PG Survey He-rich Hot Subdwarfs
Abstract: The evolutionary status of the ``compact'' He-rich hot subdwarfs remains in limbo. Although a variety of plausible theoretical scenarios have been proposed to place the compact sdOs in a rational evolutionary context, none are as yet solidly established. The very few sdO masses that have been empirically determined do not meet with theoretical expectations for compact sdOs. This project is intended to identify the radial velocity variables in a sample of 26 sdO binary candidates. The candidate systems have been identified on the basis of either a near IR flux excess or an anomalous optical flux distribution. Candidates showing significant radial velocity variability will be subject to precision radial velocity studies to determine orbital parameters and masses.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360