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HEAO 1 observations of X-ray emission from flares on dMe starsThe paper reports the detection of two X-ray flares from each of the nearby dMe stars, AT Mic and AD Leo, with the A-2 experiment on board HEAO 1. A spectrum obtained during the brighter AT Mic flare, the first X-ray spectrum of a stellar flare, is well matched by a thermal model with a temperature 3 x 10 to the 7 K and an iron K-alpha emission line. The X-ray luminosities derived are in the range 1.3-16 x 10 to the 30th ergs/s, while emission measures are in the range 1.1-14 x 10 to the 53rd/cu cm. The estimated Lx/Lopt ratios exceed unity and are inconsistent with Mullan's flare model. Several scenarios to explain this discrepancy are proposed.
Document ID
19800032732
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Kahn, S. M.
(California Univ. Berkeley, CA, United States)
Mason, K. O.
(California Univ. Berkeley, CA, United States)
Bowyer, C. S.
(California, University Berkeley, Calif., United States)
Linsky, J. L.
(California Univ. Berkeley, CA, United States)
Haisch, B. M.
(Joint Institute for Laboratory Astrophysics Boulder, Colo., United States)
White, N. E.
(California Univ. Berkeley, CA, United States)
Pravdo, S. H.
(NASA Goddard Space Flight Center Laboratory for High Energy Astrophysics, Greenbelt, Md., United States)
Date Acquired
September 4, 2013
Publication Date
December 1, 1979
Publication Information
Publication: Astrophysical Journal
Subject Category
Astrophysics
Report/Patent Number
PB80-221559
Accession Number
80A16902
Funding Number(s)
CONTRACT_GRANT: NAS8-33084
CONTRACT_GRANT: CIT-44-727600
Distribution Limits
Public
Copyright
Other

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