VHE gamma ray absorption by galactic interstellar radiation field

Abstract

Adopting a recent calculation of the Galactic interstellar radiation field, we calculate the attenuation of the very high energy gamma rays from the Galactic sources. The infra-red radiation background near the Galactic Center is very intense due to the new calculation and our result shows that a cutoff of high energy gamma ray spectrum begins at about 20 TeV and reaches about 10% for 50 TeV gamma rays.

6 pages, 1 figure, figure is changed, conclusion not changed

References in corpus (5)

• Diffuse continuum gamma rays from the Galaxy
• Extrapolation of Galactic Dust Emission at 100 Microns to CMBR Frequencies Using FIRAS
• Very high energy gamma rays from the direction of Sagittarius A*
• Calibration of cameras of the H.E.S.S. detector
• A new population of very high energy gamma-ray sources in the Milky Way

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• Wild at Heart:-The Particle Astrophysics of the Galactic Centre
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• Constraints on Decaying Dark Matter from the Isotropic Gamma-Ray Background
• A Case for Radio Galaxies as the Sources of IceCube's Astrophysical Neutrino Flux
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• Hybrid model of GeV-TeV gamma ray emission from Galactic Center
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• Prospect for dark matter signatures from dwarf galaxies by LHAASO
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• Modeling the gamma-ray emission in the Galactic Center with a fading cosmic-ray accelerator
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• Astrophysics in 2006
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• Revisiting the propagation of highly-energetic gamma rays in the Galaxy
• Constraining the position of the knee in the galactic cosmic ray spectrum with ultra-high-energy diffuse $\gamma$-rays
• The GPSP Atlas: High-resolution Galactic Photon Survival Probability Atlas for Very-High- and Ultra-High-Energy Gamma-Ray Astronomy