Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ap%26ss.183....1b&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 183, no. 1, Sept. 1991, p. 1-10.
Astronomy and Astrophysics
Astrophysics
2
Cool Stars, Dwarf Stars, Flare Stars, Nuclear Astrophysics, Stellar Atmospheres, Compton Effect, Gamma Ray Astronomy, Nuclear Fusion, Stellar Coronas
Scientific paper
Results of investigations based on the fast electron hypothesis are given which relate optical effects of UV Cet-type cool dwarfs near the sun to the inverse Compton effect and nonthermal bremsstrahlung. The hypothesis is used to explain observational phenomena such as the energy and spectrum of faint and strong flares, the emission lines of chromospheric activity, and aggregate activity. The spontaneous appearance of fast electrons above the stellar atmosphere is also considered, and the fast electrons are found to be universal in nature. Nuclear decay processes are found to be responsible for the appearance of fast electrons in outer reaches of stellar atmospheres. The decay process that can generate the fast electrons is proposed to be that following the generation of N-13 from the capture of H by C-12 in which a positron escapes and can act like a fast electron.
Bethe Hans A.
Gurzadian Grigor A.
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