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ANISOTROPY AS A PROBE OF THE GALACTIC COSMIC-RAY PROPAGATION AND HALO MAGNETIC FIELD
Qu XB(曲晓波); Zhang Y(张毅); Qu, XB; Zhang, Y; Xue, L; Liu, C; Hu, HB;刘成; Hu HB(胡洪波)
2012
发表期刊ASTROPHYSICAL JOURNAL LETTERS
卷号750期号:1页码:L17
摘要The anisotropy of cosmic rays (CRs) in the solar vicinity is generally attributed to CR streaming due to the discrete distribution of CR sources or local magnetic field modulation. Recently, the two-dimensional large-scale CR anisotropy has been measured by many experiments in the TeV-PeV energy range in both hemispheres. The tail-in excess along the tangential direction of the local spiral arm and the loss cone deficit pointing to the north Galactic pole direction agree with what have been obtained in tens to hundreds of GeV. The persistence of the two large-scale anisotropy structures in such a wide energy range suggests that the anisotropy might be due to global streaming of the Galactic CRs (GCRs). This work tries to extend the observed CR anisotropy picture from the solar system to the whole galaxy. In such a case, we can find a new interesting signature, a loop of GCR streaming, of the GCR propagation. We further calculate the overall GCR streaming induced magnetic field, and find a qualitative consistency with the observed structure of the halo magnetic field.
关键词cosmic rays diffusion Galaxy: halo ISM: magnetic fields
学科领域Astronomy & Astrophysics
DOI10.1088/2041-8205/750/1/L17
收录类别SCI
WOS记录号WOS:000303039700017
引用统计
被引频次:2[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/311005/224737
专题粒子天体物理中心
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GB/T 7714
Qu XB,Zhang Y,Qu, XB,et al. ANISOTROPY AS A PROBE OF THE GALACTIC COSMIC-RAY PROPAGATION AND HALO MAGNETIC FIELD[J]. ASTROPHYSICAL JOURNAL LETTERS,2012,750(1):L17.
APA 曲晓波.,张毅.,Qu, XB.,Zhang, Y.,Xue, L.,...&胡洪波.(2012).ANISOTROPY AS A PROBE OF THE GALACTIC COSMIC-RAY PROPAGATION AND HALO MAGNETIC FIELD.ASTROPHYSICAL JOURNAL LETTERS,750(1),L17.
MLA 曲晓波,et al."ANISOTROPY AS A PROBE OF THE GALACTIC COSMIC-RAY PROPAGATION AND HALO MAGNETIC FIELD".ASTROPHYSICAL JOURNAL LETTERS 750.1(2012):L17.
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