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Inhomogeneous structure in the chromospheres of dwarf M starsLinear combinations of observed spectra of the H-alpha and Ca-II resonance and IR lines from the chromospheres of a quiet (Gl 1) and an active (Gl 735) dwarf-M star are compared with the corresponding spectra from a star of intermediate activity (Gl 887). It is shown that the intermediate spectra cannot be explained as a simple juxtaposition of the extreme chromospheric states. It is concluded that the range of observed strengths of chromospheric activity indicators in dwarf-M stars is due, at least in part, to changes in the radial structure of the chromospheric heating function and not to changes in the area filling factor.
Document ID
Document Type
Reprint (Version printed in journal)
Turner, N. J.
(Sydney Univ. Australia)
Cram, L. E.
(Sydney, University Australia)
Robinson, R. D.
(NASA Goddard Space Flight Center Moffett Field, CA, United States)
Date Acquired
August 15, 2013
Publication Date
December 15, 1991
Publication Information
Publication: Royal Astronomical Society, Monthly Notices
Volume: 253
ISSN: 0035-8711
Subject Category
Distribution Limits
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