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Heating of chromospheres and coronae in cool starsRecent evidence is summarized that suggests that neither of two traditional views of chromospheric heating (that the flux of energy required to heat the solar chromosphere) is only a small fraction of the total radiative energy emerging from the solar interior and that chromospheres are heated by acoustic waves generated in the convection zone (which lies close to the surface of the star) is valid. Particular attention is given to cool stars, both dwarfs and giants. The directions in which research is currently heading in attempting to understand heating of chromospheres and coronae in these stars are indicated. Hot stars are excluded from consideration because radiation pressure plays an important role in their atmospheric heating. It is concluded that the role of magnetic fields in giants is different from the role in dwarfs.
Document ID
19810053941
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Mullan, D. J.
(Franklin Institute, Bartol Research Foundation, Newark DE, United States)
Date Acquired
August 11, 2013
Publication Date
December 1, 1979
Publication Information
Publication: Irish Astronomical Journal
Volume: 14
Subject Category
Astrophysics
Accession Number
81A38345
Funding Number(s)
CONTRACT_GRANT: NAGW-5
Distribution Limits
Public
Copyright
Other

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