Variability in Hot Subdwarfs and Related Objects from the Palomar-Green Catalog
Abstract
We present a selection of objects chosen from the Palomar-Green (PG) Catalog of Ultraviolet Excess Stellar Objects to search for variability. Variability could be from eclipsing binaries, cataclysmic variables, the irradiation effect and many others. The PG catalog used the Palomar 18 inch telescope to look for stars that were brighter in the ultraviolet than normal stars. One result of the PG catalog was a discovery of hot subdwarfs (sd) that dominated the sky. We chose 988 stars because they were classified in the PG catalog as sd stars or as related objects and present an analysis of 475. We used the Catalina Real-Time Transient Survey and the UBVRI photometric standard stars from Landolt to find that approximately 60 of these objects show evidence of being variable.
- Publication:
-
American Astronomical Society Meeting Abstracts #224
- Pub Date:
- June 2014
- Bibcode:
- 2014AAS...22421903B