The Last Gamma Ray Burst in our Galaxy? On the Observed Cosmic Ray Excess at 1018 eV

Details The Last Gamma Ray Burst in our Galaxy? On the Observed Cosmic Ray Excess at 1018 eV The Last Gamma Ray Burst in our Galaxy? On the Observed Cosmic Ray Excess at 1018 eV

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....2..731b&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

Scientific paper

Here we propose that the excess flux of particle events of energy near 1018 eV from the direction of the Galactic center region is due to the production of cosmic rays by the last one or two Gamma Ray Bursts in our Galaxy. The basic idea is that protons get accelerated inside Gamma Ray Bursts, then get ejected as neutrons, decay and so turn back into protons. These meander around the inner Galaxy for some time, and then interact again, turning again to neutrons to be observed at our distance from the Galactic center region, where most star formation is happ ening in our Galaxy. We demonstrate that this suggestion leads to a successful interpretation of the data, within the uncertainties of cosmic ray transport time scales in the inner Galaxy, and in conjunction with many arguments in the literature.

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