Inhomogeneous structure in the chromospheres of dwarf M stars

Details Inhomogeneous structure in the chromospheres of dwarf M stars Inhomogeneous structure in the chromospheres of dwarf M stars

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.253..575t&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 253, Dec. 15, 1991, p. 575-578.

Astronomy and Astrophysics

Astronomy

3

Chromosphere, Dwarf Stars, M Stars, Stellar Spectra, H Alpha Line, Infrared Spectra, Resonance Lines, Stellar Magnetic Fields, Stellar Spectrophotometry

Scientific paper

Linear 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.

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