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Understanding the X-ray spectrum of anomalous X-ray pulsars and soft gamma-ray repeaters
Guo, YJ; Dai, S; Li, ZS; Liu, Y; Tong, H; Xu, RX; Liu Y(刘元)
2015
发表期刊RESEARCH IN ASTRONOMY AND ASTROPHYSICS
卷号15期号:4页码:525-536
文章类型Article
摘要Hard X-rays above 10 keV are detected from several anomalous X-ray pulsars (AXPs) and soft gamma-ray repeaters (SGRs), and different models have been proposed to explain the physical origin within the frame of either a magnetar model or a fallback disk system. Using data from Suzaku and INTEGRAL, we study the soft and hard X-ray spectra of four AXPs/SGRs: 1RXS J170849-400910, 1E 1547.0-5408, SGR 1806-20 and SGR 0501+4516. It is found that the spectra could be well reproduced by the bulk-motion Comptonization (BMC) process as was first suggested by Trumper et al., showing that the accretion scenario could be compatible with Xray emission from AXPs/SGRs. Simulated results from the Hard X-ray Modulation Telescope using the BMC model show that the spectra would have discrepancies from the power-law, especially the cutoff at similar to 200 keV. Thus future observations will allow researchers to distinguish different models of the hard X-ray emission and will help us understand the nature of AXPs/SGRs.
关键词stars: neutron pulsars: individual (1E 1547.0-5408, 1RXS J170849-400910, SGR 0501+4516, SGR 1806-20) X-rays: stars
学科领域Astronomy & Astrophysics
DOI10.1088/1674-4527/15/4/006
收录类别SCI
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000352130400006
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被引频次:3[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/311005/228351
专题粒子天体物理中心
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Guo, YJ,Dai, S,Li, ZS,et al. Understanding the X-ray spectrum of anomalous X-ray pulsars and soft gamma-ray repeaters[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2015,15(4):525-536.
APA Guo, YJ.,Dai, S.,Li, ZS.,Liu, Y.,Tong, H.,...&刘元.(2015).Understanding the X-ray spectrum of anomalous X-ray pulsars and soft gamma-ray repeaters.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,15(4),525-536.
MLA Guo, YJ,et al."Understanding the X-ray spectrum of anomalous X-ray pulsars and soft gamma-ray repeaters".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 15.4(2015):525-536.
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