Gamma-ray flare and absorption in Crab Nebula: Lovely TeV--PeV astrophysics

Details Gamma-ray flare and absorption in Crab Nebula: Lovely TeV--PeV astrophysics Gamma-ray flare and absorption in Crab Nebula: Lovely TeV--PeV astrophysics

2012-02-29

arxiv.org/abs/1202.6439v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

6 pages, 5 figures

Scientific paper

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.

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