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X-Ray Observations Of Stellar Flares

Published online by Cambridge University Press:  12 April 2016

Bernhard M. Haisch
Bernhard M. Haisch*
Affiliation:
Lockheed Palo Alto Research Laboratory, Palo Alto, California, USA

Abstract

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The history of stellar X-ray flare observations prior to EINSTEIN is reviewed. X-ray light curves as measured by the IPC are then presented for all time resolved flare events discovered as of July 1982 in the EINSTEIN data set. These light curves are analyzed in terms of solar-like loop models to derive densities, temperatures, loop lengths, magnetic field strength lower limits, etc. The failure of the model to adequately represent the observations in the case of the YZ CMi flares is discussed. The relationship of X-ray to optical emission and X-ray to UV emission is considered from both an observational and a theoretical viewpoint. It is concluded that the characterization of a flare by a single, time averaged ratio, Lx /Lopt , is not physically significant.

Type
Session II: Observed Activity in Red-Dwarfs
Information
International Astronomical Union Colloquium , Volume 71: Activity in Red-Dwarf Stars , 1983 , pp. 255 - 272
Copyright
Copyright © Reidel 1983

References

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