Nonthermal X-ray properties of rotation-powered pulsars and their wind nebulae
Li XH(李向华); Lu FJ(卢方军); Li, XH; Lu, FJ; Li, Z
刊名ASTROPHYSICAL JOURNAL
2008
卷号682期号:2页码:1166-1176
关键词pulsars : general radiation mechanisms : nonthermal stars : neutron X-rays : general
学科分类Astronomy & Astrophysics
DOI10.1086/589495
通讯作者[Li, Xiang-Hua ; Lu, Fang-Jun] Chinese Acad Sci, Lab Particle Astrophys, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Li, Xiang-Hua] Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany ; [Li, Zhuo] Weizmann Inst Sci, Fac Phys, IL-76100 Rehovot, Israel ; [Li, Zhuo] Peking Univ, Dept Astron, Beijing 100871, Peoples R China
文章类型Article
英文摘要We present a statistical study of the nonthermal X-ray emission of 27 young rotation-powered pulsars (RPPs) and 24 pulsar wind nebulae (PWNe) using the Chandra and XMM-Newton observations, whose high spatial resolutions enable us to resolve pulsars from their surrounding PWNe. We obtain the X-ray luminosities and spectra separately for RPPs and PWNe, and then investigate their distribution and relation to each other, as well as their relation to the pulsar rotational parameters. In pair-correlation analysis we find that (1) the X-ray (2-10 keV) luminosities of both pulsar and PWN (L-X,L- psr and L-X,L- pwn) display a strong correlation with the pulsar spin-down power. (E) over circle and characteristic age tau. The scalings resulting from a simple linear fit to the data are L-X,L- psr alpha (E) over circle (0.92 +/- 0.04) and L-X. pwn alpha (E) over circle (1.45 +/- 0.08) (68% confidence level), respectively; however, neither fit is statistically acceptable. (2) L-X,L- psr also shows a possible weak correlation with the pulsar period P and period derivative. (P) over circle, whereas L-X,L- pwn manifests a similar weak correlation with (P) over circle only. (3) The PWN photon index Gamma(pwn) is positively correlated with L-X,L- pwn and L-X,L- pwn/(E) over circle. We also found that the PWN X-ray luminosity is typically 1 to 10 times larger than that from the underlying pulsar, and the PWN photon indices span a range of 1.5 less than or similar to Gamma(pwn) less than or similar to 2.1. The statistical study of PWN spectral properties supports a particle wind model in which the X-ray emitting electrons are accelerated by the termination shock of the wind.
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
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语种英语
WOS记录号WOS:000258026100041
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被引频次:33[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/311005/239134
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
作者单位中国科学院高能物理研究所
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Li XH,Lu FJ,Li, XH,et al. Nonthermal X-ray properties of rotation-powered pulsars and their wind nebulae[J]. ASTROPHYSICAL JOURNAL,2008,682(2):1166-1176.
APA 李向华,卢方军,Li, XH,Lu, FJ,&Li, Z.(2008).Nonthermal X-ray properties of rotation-powered pulsars and their wind nebulae.ASTROPHYSICAL JOURNAL,682(2),1166-1176.
MLA 李向华,et al."Nonthermal X-ray properties of rotation-powered pulsars and their wind nebulae".ASTROPHYSICAL JOURNAL 682.2(2008):1166-1176.
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