First results from the MUSICOS 89 campaign: active surface structures and flares on HR 1099.
Abstract
The authors report on the first results from the multisite continuous campaign in December 89 (MUSICOS 89) dedicated to the study of surface active structures and flares on the RS CVn-type system HR 1099. A complete phase coverage was obtained for the Doppler imaging of photospheric spots. Quasi simultaneously, the spectral modulation of Ca II K line due to chromospheric plage regions was observed, and is being modelled. At least two exceptional flares (the largest optical flares reported in such RS CVn system) were detected photometrically and with remarkable spectral signatures in H alpha.
- Publication:
-
MUSICOS Workshop
- Pub Date:
- 1991
- Bibcode:
- 1991musi.work..117F