The MG II emission in a sample of regular-period RS CVn systems

Details The MG II emission in a sample of regular-period RS CVn systems The MG II emission in a sample of regular-period RS CVn systems

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...169..237f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 169, no. 1-2, Nov. 1986, p. 237-243.

Astronomy and Astrophysics

Astrophysics

9

Eclipsing Binary Stars, Magnesium, Stellar Activity, Stellar Spectra, Variable Stars, Chromosphere, Emission Spectra, Late Stars, Periodic Variations, Stellar Rotation

Scientific paper

The authors have studied a sample of ten RS CVn systems by means of IUE high resolution long wavelength spectra. A general trend toward decreasing chromospheric activity (Rhk) for slower rotating stars has been found. Considering the Rhk values and their relation with structural parameters (Teff, log g, log Prot) the authors suggest that there are two posssible different activity levels. The less active systems have Rhk chromospheric activity levels similar to the single cool stars showing the same general trend. A relation between Rhk and the inverse Rossby number has been obtained, in which the RS CVn stars fill the gap found by Rucinski between W UMa and the main-sequence stars.

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