Discovery of 17 variable stars in the old open cluster NGC 6791.
Abstract
We report results of photometric monitoring of the NGC 6791 field in V and B on four nights. We discovered eight contact binaries and nine other variables, with the majority of the latter (which are probably also binaries) observed in the region of the turn-off point of the cluster. The contact binaries seem to exhibit various stages of evolution, but two of them are blue stragglers. One of the variables is probably a binary composed of a red dwarf and a hot subdwarf.
- Publication:
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Monthly Notices of the Royal Astronomical Society
- Pub Date:
- November 1993
- DOI:
- 10.1093/mnras/265.1.34
- Bibcode:
- 1993MNRAS.265...34K
- Keywords:
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- binaries: close - stars: variables: other - open clusters and associations: individual: NGC 6791