Energy Spectrum of Ultra High Energy gamma-Rays from Supernova

Details Energy Spectrum of Ultra High Energy gamma-Rays from Supernova Energy Spectrum of Ultra High Energy gamma-Rays from Supernova

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pthph..79..416y&link_type=abstract

Progress of Theoretical Physics, Vol. 79, No. 2, pp. 416-428

Physics

13

Scientific paper

If a newly born neutron star in SN1987A is a powerful injector of ultra high energy (UHE) protons, UHE gamma-rays will be emitted by bombardment of supernova ejecta with these UHE particles. We compute energy spectrum of the UHE gamma-rays generated by monoenergetic protons using Monte-Carlo simulations at the period of high flux when the column density is 30 ~ 100 g/cm(2) . If the column density of the ejecta is less than ~ 100 g/cm(2) , low energy gamma-rays do not increase as E(-2) , like the case for Cyg X-3, but they have much harder spectrum close to E(-1) . The expected numbers of PeV and TeV region gamma-rays per hour are at least 0.16 counts (Lp/10(41) ergs)(S/(50 m)(2) )(d/56 kpc)(-2) and 132 counts (Lp/10(41) ergs)(S/30000 m(2) )(d/56 kpc)(-2) where Lp, S and d are the proton luminosity, the area of detectors, and the distance to LMC, respectively.

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