Physics
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jphcs..39..429g&link_type=abstract
Journal of Physics: Conference Series, Volume 39, Issue 1, pp. 429-431 (2006).
Physics
Scientific paper
Sgr A East is a supernova remnant located few parsecs away from the Galactic Centre (GC). There are good reasons to believe that this object is the source of the gamma-ray excess detected by HESS in the direction of the GC meaning that Sgr A East is likely to be an efficient Cosmic Ray (CR) accelerator. This source is embedded in a dense gas environment and an IR background which may act as astrophysical beam dump where secondary photons, neutrinos and neutrons can be produced. In particular, if 4He nuclei are accelerated beyond the EeV in Sgr A East, neutrons with energy close to the EeV should be produced by the photodisintegration of these nuclei onto the thick IR background. Neutrons with such an energy can reach the Earth before decaying and may be detectable under the form of a CR point-like excess in the direction of the GC. We determined the expected energy spectrum and the amplitude of this signal showing that it may be measurable by the AUGER observatory. Using the HESS data to normalise the primary proton spectrum, we also estimated the expected neutrino signal produced by secondary pion decay for ANTARES and for a forthcoming Mediterranean km3 neutrino telescope.
Grassoa D.
Maccione Luca
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