FG Sagittae: a binary
Thirty-four high-dispersion spectrograms of the variable star FG Sge have been used to look for periodicity in its radial velocity. The search has yielded no evidence of any periodicity with an amplitude greater than the expected measurement error of 2.5 km s/sup -1/, on timescales of 15 to 200 days. This result strongly indicates that FG Sge, the central star of the planetary nebula 60-7/sup 0/1, is not a binary star system as had been earlier suggested. Rather, the interpretation of the secular changes in the spectrum of this object must be made in terms of the evolution of a single star.
- Research Organization:
- Lick Observatory, Board of Studies in Astronomy and Astrophysics, University of California at Santa Cruz, Santa Cruz, California 95064
- OSTI ID:
- 5174854
- Journal Information:
- Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 85:7; ISSN ANJOA
- Country of Publication:
- United States
- Language:
- English
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