| Stochastic acceleration in the western hot spot of Pictor A |
| Fan ZH(范忠辉); Wang JM(王建民) ; Fan, ZH; Liu, SM; Wang, JM; Fryer, CL; Li, H
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| 2008
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| 发表期刊 | ASTROPHYSICAL JOURNAL LETTERS
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| 卷号 | 673期号:2页码:L139-L142 |
| 通讯作者 | [Fan, Zhong-Hui
; Wang, Jian-Min] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China
; [Liu, Siming
; Fryer, Christopher L.
; Li, Hui] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
; [Fryer, Christopher L.] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
|
| 摘要 | Chandra's high-resolution observations of radio galaxies require a revisit of the relevant electron acceleration processes. Although the diffusive shock particle acceleration model may explain spectra of spatially unresolved sources, it encounters difficulties in explaining the structure and spectral properties of recently discovered Chandra X-ray features in several low-power radio sources. We argue that these observations strongly suggest stochastic electron acceleration by magnetized turbulence, and show that the simplest stochastic particle acceleration model with energy-independent acceleration and escape timescales can overcome most of these difficulties. We use the bright core of the western hot spot of Pictor A as an example to demonstrate the model characteristics, which may be tested with high-energy observations. |
| 文章类型 | Article
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| 关键词 | acceleration of particles
galaxies : individual (Pictor A)
galaxies : jets radiation
mechanisms : nonthermal
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| 学科领域 | Astronomy & Astrophysics
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| 研究领域[WOS] | Astronomy & Astrophysics
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| DOI | 10.1086/528372
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| URL | 查看原文
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| 语种 | 英语
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| WOS类目 | Astronomy & Astrophysics
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| WOS记录号 | WOS:000255233000009
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.ihep.ac.cn/handle/311005/240248
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| 专题 | 粒子天体物理中心
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| 作者单位 | 中国科学院高能物理研究所
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推荐引用方式
GB/T 7714 |
Fan ZH,Wang JM,Fan, ZH,et al. Stochastic acceleration in the western hot spot of Pictor A[J]. ASTROPHYSICAL JOURNAL LETTERS,2008,673(2):L139-L142.
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| APA |
范忠辉.,王建民.,Fan, ZH.,Liu, SM.,Wang, JM.,...&Li, H.(2008).Stochastic acceleration in the western hot spot of Pictor A.ASTROPHYSICAL JOURNAL LETTERS,673(2),L139-L142.
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| MLA |
范忠辉,et al."Stochastic acceleration in the western hot spot of Pictor A".ASTROPHYSICAL JOURNAL LETTERS 673.2(2008):L139-L142.
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