KEK Theory Center and the Graduate University for Advanced Studies (Sokendai)
KEK Theory Center and the Graduate University for Advanced Studies (Sokendai)
KEK Theory Center and the Graduate University for Advanced Studies (Sokendai)
Department of Earth and Space Science, Graduate School of Science, Osaka University
Department of Physics, Tohoku University
Department of Physical Science, Hiroshima University
Center for Particle Astrophysics, Department of Astronomy and Astrophysics, Department of Physics, Pennsylvania State University
出版者
宇宙航空研究開発機構
出版者（英）
Japan Aerospace Exploration Agency (JAXA)
雑誌名
宇宙航空研究開発機構特別資料:
雑誌名(英)
JAXA Special Publication: The Energetic Cosmos; from Suzaku to ASTRO-H
巻
JAXA-SP-09-008E
ページ
14 - 17
発行年
2010-02-26
会議概要（会議名, 開催地, 会期, 主催者等）（英）
The 3rd Suzaku international Conference "Energetic Cosmos : from Suzaku to ASTRO-H" (June 29-July 2, 2009. Grand Park Otaru Hotel), Otaru, Hokkaido Japan
抄録（英）
We discuss that a nearby astrophysical source, such as pulsar, supernova remnant or gamma-ray burst (GRB), about 10(exp 5-6) years ago may be responsible for the excesses of cosmic-ray positrons and electrons recently observed by the PAMELA, ATIC/PPB-BETS, Fermi and HESS experiments. We can reproduce the smooth Fermi/HESS spectra as well as the spiky ATIC/PPB-BETS spectra. The spectra can possess a sharp cutoff that is similar to the dark matter predictions since higher energy cosmic-rays cool faster where the cutoff energy marks the source age. A burst-like astrophysical source is expected to have a small but finite spread in the cutoff as well as anisotropy in the cosmic-ray and diffuse gamma-ray flux, providing a method for the Fermi and future CALET experiments to discriminate between dark matter and astrophysical origins and also to constrain the source duration. Whether the source is leptonic or hadronic may be probed by the antiprotons. Such GRB-like sources may leave remnants observed as mysterious TeV unidentified sources.
内容記述（英）
Meeting sponsors: The University of Tokyo, The Institute of Physical and Chemical Research, The Japan Society for the Promotion of Science
Cosmic-Ray Positrons from Astrophysical Sources: GRBs, Pulsars and SNRs
64574004.pdf
(336.22KB)
