SIMBAD references

2001PASP..113..944W - Publ. Astron. Soc. Pac., 113, 944-953 (2001/August-0)

A search for binary hot subdwarfs. II. Infrared photometry of Palomar-Green survey sdO stars.

WILLIAMS T., McGRAW J.T., MASON P.A. and GRASHUIS R.

Abstract (from CDS):

Eight sdO binary candidates have been identified through IR photometry of 25 type O hot subdwarfs. Five of the eight binary candidates are identified for the first time. These new binary candidates complement a list of nine optically identified sdO binary candidates discovered in an earlier portion of this project. The new candidates are identified on the basis of IR color excesses in two-color plots of extinction-corrected data. We estimate that at least 64% of the Palomar-Green Survey sdOC hot subdwarfs are binary.

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Journal keyword(s): Stars: Binaries: General - Stars: Fundamental Parameters - Stars: Horizontal-Branch

Simbad objects: 64

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