Detection of the Highest Energy Cosmic Gamma Ray―Approaching the Acceleration Limit of Galactic Cosmic Rays
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- Kawata Kazumasa
- 東京大学宇宙線研究所
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- Ohnishi Munehiro
- 東京大学宇宙線研究所
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- Sako Takashi K.
- 東京大学宇宙線研究所
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- Takita Masato
- 東京大学宇宙線研究所
Bibliographic Information
- Other Title
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- 観測史上最高エネルギー宇宙ガンマ線の検出――銀河系宇宙線の加速限界にせまる
Abstract
<p>We report on the observations of cosmic gamma rays in the 100 TeV energy region with new hybrid detectors consisting of the surface scintillation detectors combined with the underground water-Cherenkov-type muon detectors. The highest energy of the detected gamma rays from the Crab Nebula is estimated to be unprecedentedly as high as 450 TeV. We also detected gamma rays beyond 100 TeV from the overlapping region between SNR G106.3+2.7 and the molecular cloud. This feature suggests that SNR G106.3+2.7 is a potential candidate for a PeVatron, which is the cosmic-ray accelerator beyond PeV energies existing in our Galaxy. Our observations open a new energy window (beyond 100 TeV) in the gamma-ray astronomy and astrophysics.</p>
Journal
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- Butsuri
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Butsuri 77 (3), 155-160, 2022-03-04
The Physical Society of Japan
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Details 詳細情報について
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- CRID
- 1390573242828232960
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- ISSN
- 24238872
- 00290181
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- Text Lang
- ja
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- Data Source
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- JaLC
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- Abstract License Flag
- Disallowed