Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...208..199m&link_type=abstract
Astrophysical Journal, vol. 208, Aug. 15, 1976, pt. 1, p. 199-210.
Astronomy and Astrophysics
Astrophysics
7
Flares, Gamma Rays, Magnetic Stars, White Dwarf Stars, Astronomical Models, Radio Emission, Stellar Luminosity, Thermal Radiation
Scientific paper
Using the known properties of stellar flares on red dwarfs, the characteristics of flares on magnetic white dwarfs are predicted. On the basis of these predictions, the hypothesis that gamma-ray bursts are thermal radiation from a high-temperature analog of normal stellar flares occurring on magnetic white dwarfs, with surface fields of 10 to the 7th to 10 to the 8th gauss is examined. It appears unlikely that main-sequence stars are the sites of the bursts. Various observed properties of the gamma-ray bursts are shown to be analogous to known properties of normal stellar flares. In Particular, multiple peaks within a burst are ascribed to sympathetic flares. Independent arguments suggest that the gamma-ray bursts occur on white dwarfs at distances of order 100-300 pc. It is proposed that fluctuations in the luminosity of certain white dwarfs may be related to starspots and flare activity.
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