Journal Article

Gamma-ray flare and absorption in the Crab nebula: lovely TeV–PeV astrophysics

Kazunori Kohri, Yutaka Ohira and Kunihito Ioka

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 424, issue 3, pages 2249-2254
Published in print August 2012 | ISSN: 0035-8711
Published online August 2012 | e-ISSN: 1365-2966 | DOI:
Gamma-ray flare and absorption in the Crab nebula: lovely TeV–PeV astrophysics

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We spectrally fit the GeV gamma-ray flares that have recently been observed in the Crab nebula by considering a small blob Lorentz-boosted towards us. We point out that the corresponding inverse Compton flare at the TeV–PeV region is more enhanced than synchrotron emission by a Lorentz factor squared (∼Γ2). This already excludes and it will be detected by future TeV–PeV observatories, such as the Cherenkov Telescope Array (CTA), the Tibet Air Shower plus Muon Detector (Tibet AS+MD) array and the Large High Altitude Air Shower Observatory (LHAASO), for . We also show that PeV photons emitted from the Crab nebula are absorbed by cosmic microwave background radiation through electron–positron pair creation.

Keywords: pulsars: individual: Crab nebula; gamma-rays: stars

Journal Article.  4089 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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