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Rotational modulation and flares on RS CVn and BY Dra-type stars. V - Exosat and IUE observations of a flare on EQ PegasiTime-trailed UV spectra and a soft X-ray lightcurve were obtained during a flare on the binary dMe star EQ Peg AB. On the basis of solar flare Mg II surface fluxes and an about 70-percent enhancement in the disk-integrated flux during the flare on EQ Peg, it is estimated that the chromospheric flare covered about 1.5 percent of the stellar surface. The size scale is estimated to be comparable to that of a solar two-ribbon flare. This unusual flare is noted to exhibit a low-energy soft X-ray rise phase which is longer than that of most flares; it is longer than the decay phase and peaks much later than the medium energy light curve. Evidence of variable Fe II emission and variable continuum emission in select UV bands during the flare is noted.
Document ID
19870065644
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Haisch, B. M.
(Lockheed Research Laboratories Palo Alto, CA, United States)
Butler, C. J.
(Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Doyle, J. G.
(Armagh Observatory United Kingdom)
Rodono, M.
(Catania, Universita Italy)
Date Acquired
August 13, 2013
Publication Date
July 1, 1987
Publication Information
Publication: Astronomy and Astrophysics
Volume: 181
Issue: 1 Ju
ISSN: 0004-6361
Subject Category
Astrophysics
Accession Number
87A52918
Funding Number(s)
CONTRACT_GRANT: NAS5-28720
CONTRACT_GRANT: NASA ORDER H-85057-B
Distribution Limits
Public
Copyright
Other

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