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The GeV Gamma-Ray Emission Detected by Fermi-LAT Adjacent to SNR Kesteven 41

  • Bing Liu (a1), Yang Chen (a1) (a2), Xiao Zhang (a1), Gao-Yuan Zhang (a1), Yi Xing (a3) and Thomas G. Pannuti (a4)...

Abstract

Gamma-ray observations for Supernova remnant (SNR)-molecular cloud (MC) association systems play an important role in the research on the acceleration and propagation of cosmic-ray protons. Through the analysis of 5.6 years of Fermi-Large Area Telescope observation data, here we report on the detection of a gamma-ray emission source near the SNR Kesteven 41 with a significance of 24σ in 0.2–300 GeV. The best-fit location of the gamma-ray source is consistent with the MC with which the SNR interacts. Several hypotheses including both leptonic and hadronic scenarios are considered to investigate the origin of these gamma-rays. The gamma-ray emission can be naturally explained by the decay of neutral pions produced via the collision between high energy protons accelerated by the shock of Kesteven 41 and the adjacent MC. The electron energy budget would be too high for the SNR if the gamma-rays were produced via inverse Compton (IC) scattering off the Cosmic Microwave Background (CMB) photons.

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The GeV Gamma-Ray Emission Detected by Fermi-LAT Adjacent to SNR Kesteven 41

  • Bing Liu (a1), Yang Chen (a1) (a2), Xiao Zhang (a1), Gao-Yuan Zhang (a1), Yi Xing (a3) and Thomas G. Pannuti (a4)...

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