Time-dependent heating phenomena in coronal loops.
Abstract
The authors have investigated the behaviour of coronal loops subject to flare-like heating. They pay attention to the conflicting results obtained by Kuin and Martens (1982) and Craig and Schulkes (1985). They show that the description of Kuin and Martens is correct and extend it for a larger range of loop temperatures. Further, they show that the evolution of the loop is governed by the history of the heating function. Under certain conditions individual heat depositions are masked. Quasi-periodic variations observed with EXOSAT in the light curves of the RS CVn system HR 1099 (Barstow, 1985) are explained in terms of time-dependent heating. This observation serves as a case study for the theoretical results obtained in this paper and represents the first detection of flare-like heating in the corona of an RS CVn system.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- December 1988
- Bibcode:
- 1988A&A...207...89V
- Keywords:
-
- Coronal Loops;
- Plasma Heating;
- Stellar Flares;
- Time Dependence;
- Cataclysmic Variables;
- M Stars;
- Pre-Main Sequence Stars;
- Solar Corona;
- Stellar Envelopes;
- X Ray Sources;
- Astrophysics