IUE spectra of RS CVn stars
Abstract
Three RS CVn stars are observed during the period October 1-7, 1981. Eight spectra of II Peg, 10 of HR1099, and four of AR Lac are obtained. The observations are well distributed with respect to the phase of the optical light curves. The ground-based data reveal that all three stars had well established wavelike variations. Evidence is presented that in RS CVn stars the UV chromospheric and transition region line fluxes vary in such a way that maximum line flux corresponds to optical minimum or maximum spot visibility. This, it is pointed out, is consistent with a solar-type dark spot model.
- Publication:
-
IAU Colloq. 71: Activity in Red-Dwarf Stars
- Pub Date:
- 1983
- DOI:
- 10.1007/978-94-009-7157-8_58
- Bibcode:
- 1983ASSL..102..443A
- Keywords:
-
- Binary Stars;
- Starspots;
- Stellar Spectra;
- Ultraviolet Spectra;
- Variable Stars;
- Chromosphere;
- Iue;
- Light Curve;
- Stellar Flares;
- Astrophysics