Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.110..413m&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 110, no. 2, March 1985, p. 413-416.
Astronomy and Astrophysics
Astrophysics
1
Absorption Spectra, Binary Stars, F Stars, G Stars, Helium Ions, Main Sequence Stars, Stellar Luminosity, X Ray Spectra, Spectral Line Width, Stellar Atmospheres, Stellar Coronas
Scientific paper
A study of the relationship between soft X-ray luminosity and He I 10830 equivalent width in RS CVn binaries and very active late-type main-sequence stars is made. Long-period RS CVns and very active F and G main-sequence stars show strong dependence on their X-ray luminosities. This is attributed to the dominance of coronal excitation of the line in these stars. Short-period RS CVn binaries have lower He I 10830 absorption compared to their X-ray emission. This phenomenon is explained by the presence of He I emission region also in their chromospheres.
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