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- Title
Coordinated Exosat and spectroscopic observations of flare stars and coronal heating.
- Authors
Butler, C. J.; Rodono, M.; Foing, B. H.; Haisch, B. M.
- Abstract
The X-ray flux of dMe stars is thought to arise from two distinct mechanisms, one involving a continuous 'quiescent' emission from a high-temperature plasma and the other involving the dramatic flare events which have long been known to occur on these stars. We present here some results of simultaneous monitoring of the two flare stars, UV Ceti and EQ Peg, with Exosat and ground-based optical spectroscopy. We observe short-timescale variability in the 0.1-2-keV emission from both these objects and, in the case of UV Ceti, find a strong correlation between the soft X-ray and Hγ fluctuations. The implication is that much of the low-level X-ray flux previously considered 'quiescent' probably originates from small flare events.
- Publication
Nature, 1986, Vol 321, Issue 6071, p679
- ISSN
0028-0836
- Publication type
Article
- DOI
10.1038/321679a0