The Contribution From TeV Halos to the Isotropic Gamma-Ray Background
Abstract
Recent observations have shown that pulsars are surrounded by extended regions which emit TeV-scale gamma rays through the inverse Compton scattering of very high energy electrons and positrons. Such TeV halos are responsible for a large fraction of the Milky Way's TeV-scale gamma-ray emission. In this paper, we calculate the gamma-ray spectrum from the population of TeV halos located within the Andromeda Galaxy, predicting a signal that is expected to be detectable by the Cherenkov Telescope Array (CTA). We also calculate the contribution from TeV halos to the isotropic gamma-ray background (IGRB), finding that these sources should contribute significantly to this flux at the highest measured energies, constituting up to of the signal observed above .
Keywords
Cite
@article{arxiv.2111.03646,
title = {The Contribution From TeV Halos to the Isotropic Gamma-Ray Background},
author = {Fei Xu and Dan Hooper},
journal= {arXiv preprint arXiv:2111.03646},
year = {2022}
}
Comments
9 pages, 3 figures