Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986cha%26a..10..221l&link_type=abstract
Chinese Astronomy and Astrophysics, Volume 10, Issue 3, p. 221-229.
Astronomy and Astrophysics
Astrophysics
6
Stars - Binaries - Spectroscopic Binaries
Scientific paper
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.
Liu Xue-Fu
Tan Hui-Song
No associations
LandOfFree
Observation and study of the H-alpha emission of 33 RS CVN stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Observation and study of the H-alpha emission of 33 RS CVN stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observation and study of the H-alpha emission of 33 RS CVN stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1294313