Constraints on the diffusive shock acceleration from the nonthermal X-ray thin shells in SN 1006 NE rim

Astronomy Astrophysics 416 巻 2 号 595-602 頁 2004 発行
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タイトル ( eng )
Constraints on the diffusive shock acceleration from the nonthermal X-ray thin shells in SN 1006 NE rim
作成者
Yamazaki Ryo
Yoshida T.
Terasawa T.
Banba A.
Koyama K.
収録物名
Astronomy Astrophysics
416
2
開始ページ 595
終了ページ 602
抄録
Characteristic scale lengths of nonthermal X-rays from the SN 1006 NE rim, which are observed by Chandra, are interpreted in the context of diffusive shock acceleration with the assumption that the observed spatial profile of nonthermal X-rays corresponds to that of accelerated electrons with energies of a few tens of TeV. To explain the observed scale lengths, we construct two simple models with a test particle approximation, where the maximum energy of accelerated electrons is determined by the age of SN 1006 (age-limited model) or the energy loss (energy loss-limited model), and constrain the magnetic field configuration and the diffusion coefficients of accelerated electrons. When the magnetic field is nearly parallel to the shock normal, the magnetic field should be in the range of 20-85 uG and highly turbulent both upstream and downstream, which means that the mean free path of accelerated electrons is of the order of their gyro-radius (Bohm limit). This situation can be realized both in the age-limited and energy loss-limited model. On the other hand, when the magnetic field is nearly perpendicular to the shock normal, which can exist only in the age-limited case, the magnetic field is several uG upstream and 14-20 uG downstream, and the upstream magnetic field is less turbulent than the downstream.
著者キーワード
acceleration of particles - ISM
supernova remnants - X-rays
ndividual
SN 1006
NDC分類
天文学・宇宙科学 [ 440 ]
言語
英語
資源タイプ 学術雑誌論文
出版者
EDP Science
発行日 2004
権利情報
Copyright (c) 2004 ESO
出版タイプ Version of Record(出版社版。早期公開を含む)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0004-6361
[DOI] 10.1051/0004-6361:20034212
[DOI] http://dx.doi.org/10.1051/0004-6361:20034212 ~の異版である