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A flare event in the peculiar giant FK ComaeObservations are presented of a very energetic flare event in the peculiar rapidly rotating star FK Comae. During this event on June 18th 1981 the usual asymmetrical double peaked H alpha emission feature with an equivalent width (EW) approx 3-4 A changed to a broad emission feature with EW approx 13 A. Sixteen spectra were obtained over 2 hours. Some changes in the emission profile are apparent on this time scale. The following night the enhanced emission persisted but at lower levels and it was substantially redshifted. This event is interpreted in terms of a model where material is injected into a disk co-rotating with the angular velocity of the stellar surface. A localized region of surface activity is conjectured to be the source of the event.
Document ID
19830012598
Document Type
Conference Paper
Authors
Ramsey, L. W. (Pennsylvania State Univ. University Park, PA, United States)
Nations, H. L. (Pennsylvania State Univ. University Park, PA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1981
Publication Information
Publication: Smithsonian Astrophysics Observatory 2nd Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, Vol. 1
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: F19628-80-C-0036
CONTRACT_GRANT: NSF AST-78-19317
CONTRACT_GRANT: NSF AST-80-25204
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19830012575Analytic PrimarySecond Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, volume 1