Physics
Scientific paper
Jan 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975rspta.277..489l&link_type=abstract
(Royal Society, Discussion on the Origin of the Cosmic Radiation, London, England, Feb. 20, 21, 1974.) Royal Society (London), P
Physics
8
Cosmic Rays, Dwarf Stars, Galactic Radiation, M Stars, Solar Flares, Stellar Radiation, Binary Stars, K Stars, Milky Way Galaxy, Particle Energy, Stellar Spectra, Stellar Temperature
Scientific paper
The rate of energy release during the flaring of M and K type stars is of the same order as the normal energy release of the star in the quiescent condition. Although these dwarf stars are in a markedly different evolutionary condition compared with the sun, recent simultaneous radio and optical observations of the flares have given decisive indications that the physical processes, involving magnetic field collapse of several hundredths of a tesla, must be similar to the flare mechanism in the sun. Adopting the factor, which has been determined empirically in the case of the sun, for the conversion of flare energy to cosmic-ray energy, estimates are made of the fraction of galactic cosmic rays which may be generated in the flares on the M and K type stars. It is shown that these stars may be the major source of the galactic cosmic rays for energies from 1 to 300 MeV and that the K type stars may contribute one-fifth of the total cosmic-ray energy up to 1 GeV.
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