Gamma-ray emission during the bursts of supernovae

Details Gamma-ray emission during the bursts of supernovae Gamma-ray emission during the bursts of supernovae

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981azh....58..343k&link_type=abstract

Astronomicheskii Zhurnal, vol. 58, Mar.-Apr. 1981, p. 343-349. In Russian.

Astronomy and Astrophysics

Astronomy

Bursts, Gamma Ray Astronomy, Nuclear Reactions, Shock Fronts, Shock Wave Propagation, Supernovae, Gravitational Collapse, Light Curve, Neutrinos, Stellar Evolution, Stellar Models, X Ray Sources

Scientific paper

Gamma-ray emission generated in the shock front during a supernova explosion is examined, and two emission mechanisms, both associated with nuclear collisions in the shock front, are proposed. In collisions with the excitation of nuclei, a nuclear-nuclear mechanism of gamma-ray emission in the energy range of not greater than 10 MeV is found to operate. At higher shock velocities, a nuclear-meson mechanism is found to operate, whereby pions are formed whose decay yields hard gamma rays with energies of 70 MeV. The intensity ratio of both mechanisms is sensitive to the shock wave velocity and to the chemical composition of the supernova shell. It is suggested that a correlation of predicted gamma-ray bursts with neutrino and X-ray bursts as well as with the light curve of supernovae may yield important information on presupernova properties.

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