A Search for Binary Hot Subdwarfs. I. BVRI Photometry of Palomar-Green Survey sdO Stars

Details A Search for Binary Hot Subdwarfs. I. BVRI Photometry of Palomar-Green Survey sdO Stars A Search for Binary Hot Subdwarfs. I. BVRI Photometry of Palomar-Green Survey sdO Stars

Apr 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pasp..113..490w&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 113, Issue 782, pp. 490-500.

Astronomy and Astrophysics

Astronomy

9

Stars: Binaries: General, Stars: Fundamental Parameters, Stars: Horizontal-Branch

Scientific paper

Nine binary candidates have been identified from a sample of 64 hot subdwarf sdO/OB/OC stars selected from the Palomar-Green Survey. Three of the binary candidates had been identified previously. The binary candidates emerged from BVRI photometric observations and were identified by their intrinsic color excesses in two-color plots and by comparison to synthetic binary system colors. The data presented here are the initial results of a larger program aimed at identifying helium-rich hot subdwarf binary systems suitable for more detailed investigation of their fundamental stellar parameters and evolutionary status.

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