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Resolving the Origin of the Unidentified TeV Source HESS J1626-490 as a Relic of the Ancient Cosmic-Ray Factory SNR G335.2+0.1
http://hdl.handle.net/10458/0002001669
http://hdl.handle.net/10458/000200166929a5f781-c389-479e-80f6-14918dd1b9f5
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| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||||||||||||||||
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| 公開日 | 2025-08-27 | |||||||||||||||||||||
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| タイトル | Resolving the Origin of the Unidentified TeV Source HESS J1626-490 as a Relic of the Ancient Cosmic-Ray Factory SNR G335.2+0.1 | |||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||
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| 言語 | eng | |||||||||||||||||||||
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| 資源タイプ | journal article | |||||||||||||||||||||
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| アクセス権 | open access | |||||||||||||||||||||
| 著者 |
Oka, Tomohiko
× Oka, Tomohiko
× Ishizaki, Wataru
× Mori, Masaki
× Sano, Hidetoshi
× 鈴木, 寛大
WEKO
35601
× Tanaka, Takaaki
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| 内容記述タイプ | Abstract | |||||||||||||||||||||
| 内容記述 | While decades of observations in the TeV gamma-ray band have revealed more than 200 sources with radio or X-ray counterparts, there remain dozens of unidentified TeV sources, which may provide crucial information of cosmic-ray (CR) accelerators. HESS J1626−490 is an unidentified TeV gamma-ray source but is expected to originate from CRs that escaped from the nearby supernova remnant (SNR) G335.2+0.1 and are interacting with dense interstellar clouds. To test this scenario, we scrutinize the properties of the SNR and search for nonthermal counterparts by analyzing observational data in the radio, X-ray, and GeV gamma-ray bands. From analysis of the H i and 12CO (J = 1–0) line data, we identify the cloud associated with the SNR and compare the morphologies of the cloud and the gamma-ray emission. The distance and age of the SNR are estimated to be 3.3 ± 0.6 kpc and ∼5 kyr, respectively. From X-ray and GeV gamma-ray data analyses, we find an extended GeV gamma-ray emission overlapping with the SNR and H.E.S.S. source regions but no X-ray emission. The location of the peak of the extended GeV emission changes from near the SNR at ≲1 GeV to the H.E.S.S. source at >10 GeV. We find a spectral hardening at ∼50 GeV, which is consistent with the existence of two components in the gamma-ray emission. We find that a combination of emission from the escaped CRs and the SNR itself can reproduce the observed broadband spectrum, on the assumption that the SNR has accelerated protons to ≳100 TeV in the past. | |||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||
| 書誌情報 |
en : Astrophysical Journal 巻 989, 号 2, p. 137, 発行日 2025-08-20 |
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| 出版者 | American Astronomical Society | |||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||
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| 収録物識別子タイプ | EISSN | |||||||||||||||||||||
| 収録物識別子 | 15384357 | |||||||||||||||||||||
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| 収録物識別子タイプ | ISSN | |||||||||||||||||||||
| 収録物識別子 | 0004637X | |||||||||||||||||||||
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| 関連タイプ | isVersionOf | |||||||||||||||||||||
| 識別子タイプ | DOI | |||||||||||||||||||||
| 関連識別子 | https://doi.org/10.3847/1538-4357/adec80 | |||||||||||||||||||||
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| 権利情報 | © 2025. The Author(s). | |||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||
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| 出版タイプ | VoR | |||||||||||||||||||||
