Cosmic Gamma-ray Background Radiation
Abstract
The cosmic gamma-ray background radiation is one of the most fundamental observables in the gamma-ray band. Although the origin of the cosmic gamma-ray background radiation has been a mystery for a long time, the Fermi gamma-ray space telescope has recently measured it at 0.1-820 GeV and revealed that the cosmic GeV gamma-ray background is composed of blazars, radio galaxies, and star-forming galaxies. However, Fermi still leaves the following questions. Those are dark matter contribution, origins of the cosmic MeV gamma-ray background, and the connection to the IceCube TeV-PeV neutrino events. In this proceeding, I will review the current understandings of the cosmic gamma-ray background and discuss future prospects of cosmic gamma-ray background radiation studies. I also briefly review the current status of cosmic infrared/optical background radiation studies.
Cite
@article{arxiv.1412.3886,
title = {Cosmic Gamma-ray Background Radiation},
author = {Yoshiyuki Inoue},
journal= {arXiv preprint arXiv:1412.3886},
year = {2014}
}
Comments
10 pages, 7 figures, baed on an invited review talk at the "Fifth International Fermi Symposium", 2014 Fermi Symposium proceedings - eConf C14102.1