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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
2008
发表期刊ASTROPHYSICAL JOURNAL LETTERS
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
文章类型Article
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.
关键词acceleration of particles galaxies : individual (Pictor A) galaxies : jets radiation mechanisms : nonthermal
学科领域Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
DOI10.1086/528372
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语种英语
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000255233000009
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被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240248
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
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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.
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.
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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