On the Origin of the Hard X-Ray Excess of High-Synchrotron-Peaked BL Lac Object Mrk 421

doi:10.3847/1538-4357/aa7744

	On the Origin of the Hard X-Ray Excess of High-Synchrotron-Peaked BL Lac Object Mrk 421
	Chen, Liang 1,2
发表期刊	ASTROPHYSICAL JOURNAL
	2017-06-20
卷号	842 期号:2
DOI	10.3847/1538-4357/aa7744
收录类别	SCI
关键词	Bl Lacertae Objects: Individual (Mrk 421) Galaxies: Active Galaxies: Jets Radiation Mechanisms: Nonthermal X-rays: Galaxies
摘要	For the first time, Kataoka & Stawarz reported. a clear detection of a hard X-ray excess, above greater than or similar to 20 keV, in the high-synchrotron-peaked BL Lac object. Mrk 421. We find that this feature may. not be. produced by the low-energy part of the. same electron population that. produced the Fermi/LAT gamma-ray. Because of that, it is. required. that the power-law electron energy go. down to gamma(min) approximate to 19, which predicts a very strong radio emission (radio flux larger than the observed), even considering the synchrotron self-absorption effect. We investigate the possibility of this excess being. produced from the spine/layer jet structure, which has been clearly detected in Mrk 421. We find that. (1) similar to one-zone modeling, the spine emissions provide good. modeling of the. broadband spectral energy distribution, except for. the hard X-ray excess; and. (2) the hard X-ray excess can be well represented by the synchrotron photons (from the. layer) being inverse Compton scattered by the spine electrons.
资助项目	NSFC[11233006] ; NSFC[U1431123] ; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences[OP20140X]
项目资助者	NSFC[11233006, U1431123] ; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences[OP20140X]
语种	英语
学科领域	天文学 ; 天体物理学 ; 高能天体物理学
文章类型	Article
出版者	IOP PUBLISHING LTD
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN	0004-637X
URL	查看原文
WOS记录号	WOS:000404266000002
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	ACTIVE GALACTIC NUCLEI ; EXTERNAL RADIATION-FIELDS ; BRIGHT FERMI BLAZARS ; LARGE-AREA TELESCOPE ; HIGH-ENERGY EMISSION ; III ZW 2 ; PHYSICAL-PROPERTIES ; RELATIVISTIC JETS ; PKS 2155-304 ; MULTIWAVELENGTH OBSERVATIONS
引用统计	被引频次：32[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/10141
专题	中国科学院天体结构与演化重点实验室
通讯作者	Chen, Liang
作者单位	1.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
推荐引用方式 GB/T 7714	Chen, Liang. On the Origin of the Hard X-Ray Excess of High-Synchrotron-Peaked BL Lac Object Mrk 421[J]. ASTROPHYSICAL JOURNAL,2017,842(2).
APA	Chen, Liang.(2017).On the Origin of the Hard X-Ray Excess of High-Synchrotron-Peaked BL Lac Object Mrk 421.ASTROPHYSICAL JOURNAL,842(2).
MLA	Chen, Liang."On the Origin of the Hard X-Ray Excess of High-Synchrotron-Peaked BL Lac Object Mrk 421".ASTROPHYSICAL JOURNAL 842.2(2017).

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