On the Origin of the Hard X-Ray Excess of High-Synchrotron-Peaked BL Lac Object Mrk 421
Chen, Liang1,2; Chen, Liang(Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China)
发表期刊ASTROPHYSICAL JOURNAL
2017-06-20
卷号842期号:2
DOI10.3847/1538-4357/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.
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
文章类型Article
ISSN0004-637X
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
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被引频次:7[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(Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China)
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
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Chen, Liang,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,&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,et al."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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