Understanding the X-ray spectrum of anomalous X-ray pulsars and soft gamma-ray repeaters

	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)
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2015
卷号	15 期号:4 页码:525-536
关键词	stars: neutron pulsars: individual (1E 1547.0-5408 X-rays: stars 1RXS J170849-400910 SGR 0501+4516 SGR 1806-20)
英文摘要	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.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
收录类别	SCI
WOS记录号	WOS:000352130400006
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228351]
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	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.