Other
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.321..679b&link_type=abstract
Nature (ISSN 0028-0836), vol. 321, June 12, 1986, p. 679-682. CNR-NATO-supported research.
Other
57
Exosat Satellite, Flare Stars, H Gamma Line, Stellar Coronas, Stellar Spectra, X Ray Stars, Optical Emission Spectroscopy, Plasma Heating, Variable Stars
Scientific paper
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 dramatic flare events. The authors present here some results of simultaneous monitoring of the two flare stars, UV Ceti and EQ Peg, with Exosat and ground-based optical spectroscopy. They 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.
Butler John C.
Foing Bernard H.
Haisch Bernard M.
Rodono' Marcello
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