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IRAS observations of chromospherically active dwarf starsFar-infrared observations of chromospherically active, spotted, and plage stars in the dF7-dk7 spectral range are examined. Most (75 percent) of the stars have detectable 12-micron fluxes, and 50 percent of them have 25-micron emission. The 12-micron luminosity, L(12), is found to be in the range of 1.5-13 x 10 to the 30th ergs/s and to comprise only 0.2-0.5 percent of the star's total luminosity, L(bol). The present work extends to earlier spectral types and higher stellar luminosities the L(12) vs L(bol) relationship noted previously for late-type active dwarfs (K5-M5).
Document ID
19890057230
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Tsikoudi, Vassiliki (Ioannina, University Greece)
Date Acquired
August 14, 2013
Publication Date
July 1, 1989
Publication Information
Publication: Astronomical Journal
Volume: 98
ISSN: 0004-6256
Subject Category
ASTRONOMY
Distribution Limits
Public
Copyright
Other