YNAO OpenIR  > 中国科学院天体结构与演化重点实验室
On the Origin of the Hard X-Ray Excess of High-Synchrotron-Peaked BL Lac Object Mrk 421
Chen, Liang1,2
Source PublicationASTROPHYSICAL JOURNAL
2017-06-20
Volume842Issue:2
DOI10.3847/1538-4357/aa7744
Indexed BySCI
KeywordBl Lacertae Objects: Individual (Mrk 421) Galaxies: Active Galaxies: Jets Radiation Mechanisms: Nonthermal X-rays: Galaxies
Abstract

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.

Funding ProjectNSFC[11233006] ; NSFC[U1431123] ; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences[OP20140X]
Funding OrganizationNSFC[11233006, U1431123] ; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences[OP20140X]
Language英语
Subject Area天文学 ; 天体物理学 ; 高能天体物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000404266000002
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordACTIVE 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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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/10141
Collection中国科学院天体结构与演化重点实验室
Corresponding AuthorChen, Liang
Affiliation1.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
Recommended Citation
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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