Discovery of gamma-ray emission from the supernova remnant Kes 17 with Fermi Large Area Telescope

Details Discovery of gamma-ray emission from the supernova remnant Kes 17 with Fermi Large Area Telescope Discovery of gamma-ray emission from the supernova remnant Kes 17 with Fermi Large Area Telescope

2011-08-20

arxiv.org/abs/1108.4084v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

13 pages, 3 figures, 1 table, accepted for publication in ApJ Letter

Scientific paper

We report the discovery of GeV emission at the position of supernova remnant Kes 17 by using the data from the Large Area Telescope on board the Fermi Gamma-ray Space Telescope. Kes 17 can be clearly detected with a significance of ~12 sigma in the 1 - 20 GeV range. Moreover, a number of gamma-ray sources were detected in its vicinity. The gamma-ray spectrum of Kes 17 can be well described by a simple power-law with a photon index of ~ 2.4. Together with the multi-wavelength evidence for its interactions with the nearby molecular cloud, the gamma-ray detection suggests that Kes 17 is a candidate acceleration site for cosmic-rays.

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