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- W2034834037 abstract "Abstract In September 1984, using the Reticon on the 2.1m telescope of McDonald Observatory, we observed the spectra in the Hα region of 33 binaries of the RS CVn type. Our observations of radial velocity and equivalent width are given here. For the first time, we detected Hα emission in the 3 systems, HD 8357, HD 175742 and HR 7428, and their emission features are described in detail. We also found HD 8357 to have a double spectrum and determined the radial velocity curves of the two components, and their mass ratio. The 6 systems, λ And, UX Ari, RT Lac, AR Lac, HK Lac and HD 185151 show persistent or occasional strong Hα emission, and they are briefly described and analysed. The remaining 24 systems showed absorption features in their Hα profile, but their equivalent widths are appreciably smaller than standard stars of similar spectral type, and they also varied in time. We believe that Hα emission is one of the common features of binaries of this type." @default.
- W2034834037 created "2016-06-24" @default.
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- W2034834037 date "1986-09-01" @default.
- W2034834037 modified "2023-09-26" @default.
- W2034834037 title "Observation and study of the H-alpha emission of 33 RS CVN stars" @default.
- W2034834037 cites W1643927311 @default.
- W2034834037 cites W1984263805 @default.
- W2034834037 doi "https://doi.org/10.1016/0275-1062(86)90009-3" @default.
- W2034834037 hasPublicationYear "1986" @default.
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