Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982iraj...15..288m&link_type=abstract
Irish Astronomical Journal (ISSN 0021-1052), vol. 15, Sept. 1982, p. 288-306.
Astronomy and Astrophysics
Astrophysics
1
Astrophysics, Red Dwarf Stars, Atmospheric Heating, Chromosphere, Solar Activity, Starspots, Stellar Coronas, Stellar Flares, Stellar Magnetic Fields, Stellar Rotation, Stellar Structure, Stellar Temperature
Scientific paper
Recent observational and theoretical investigations of activity in red dwarfs are reviewed in a summary of papers given at the IAU Colloquium in Catania, Sicily, in August, 1982. Consideration is given to the physical properties of active dwarfs, such as effective temperature, opacity, stellar structure, convection and chromospheric heating, coronal heating, rotation, starspots, and magnetic fields. Observations discussed include optical, UV, and X-ray data on flares (F), spots, and precursors; activity cycles in stars; activity on stars other than red dwarfs; and applicable (mainly VLA) observations of the sun. Theoretical studies of such problems as the high-temperature extension of the 'nebular' model, coronal heating versus F, energy release and dissipation in F, electrodynamic coupling between photosphere and corona, the role of the photosphere in F, the fast-electron hypothesis of F light, the gas dynamics of a stellar atmosphere during F and starspots are summarized.
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