Gamma-ray flare and absorption in Crab Nebula: Lovely TeV-PeV astrophysics
High Energy Astrophysical Phenomena
2015-06-04 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
Abstract
We spectrally fit the GeV gamma-ray flares recently-observed in the Crab Nebula by considering a small blob Lorentz-boosted towards us. We point out that the corresponding inverse-Compton flare at TeV--PeV region is more enhanced than synchrotron by a Lorentz factor square \sim \Gamma^2, which is already excluding \Gamma \gtrsim 200 and will be detected by future TeV - PeV observatories, CTA, Tibet AS + MD and LHAASO for \Gamma \gtrsim 30. We also show that PeV photons emitted from the Crab Nebula are absorbed by Cosmic Microwave Background radiation through electron-positron pair creation.
Keywords
Cite
@article{arxiv.1202.6439,
title = {Gamma-ray flare and absorption in Crab Nebula: Lovely TeV-PeV astrophysics},
author = {Kazunori Kohri and Yutaka Ohira and Kunihito Ioka},
journal= {arXiv preprint arXiv:1202.6439},
year = {2015}
}
Comments
6 pages, 5 figures, to appear in Mon. Not. Roy. Astron. Soc