Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-12-17
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
5 pages, 3 figures, 2 tables, 2009 Fermi Symposium, eConf Proceedings C091122
Scientific paper
In the light of recent results detecting the nearest starburst galaxies M 82 and NGC 253 at very high energy (VHE), we present a multi-wavelength model succesfully explaining their gamma-ray diffuse emission. The detection of M 82 was presented by VERITAS collaboration in the recent ICRC, while the integral flux of the fainter NGC253 has just been published by HESS Collaboration. Also, in the 2009 Fermi Symposium itself, Fermi data coming from the direction of both galaxies was released, thus confirming their detection in the high energy (HE) regime. Slight and reasonable variations in the space parameter of already published models can fully account for the HE and VHE emission coming from M 82 and NGC 253, while agreeing with previous data detected from radio to infrared. We explore these changes and the implications they have for the cosmic-ray distribution in these galaxies.
del Pozo Elsa de Cea
Reimer Olaf
Rodriguez A. Y.
Torres Diego F.
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