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



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Fernández Figueroa, María José and Sedano, J. L. and Castro Rubio, Elisa de (1986) The Mg II emission in a sample of regular-period RS CVn systems. Astronomy & Astrophysics, 169 (01-feb). pp. 237-243. ISSN 0004-6361

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We 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 (R_hk) for slower rotating stars has been found. Considering the R_hk values and their relation with structural parameters (T_eff, logg, log P_rot) we suggest that there are two pos­sible 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 R_hk 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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© European Southern Observatory. The authors are very grateful to Dr. F.M. Walter for many valuable comments and suggestions.

Uncontrolled Keywords:RS CVn binaries; Chromospheric activity; Mg II emission
Subjects:Sciences > Physics > Astrophysics
Sciences > Physics > Astronomy
ID Code:32897
Deposited On:27 Aug 2015 08:04
Last Modified:10 Dec 2018 15:05

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