Radial Velocity Variables Among The PG Survey He-rich Hot Subdwarfs

Details Radial Velocity Variables Among The PG Survey He-rich Hot Subdwarfs Radial Velocity Variables Among The PG Survey He-rich Hot Subdwarfs

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002noao.prop...75w&link_type=abstract

NOAO Proposal ID #2002A-0075

Computer Science

Scientific paper

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.

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