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Using the Markov chain Monte Carlo method to study the physical properties of GeV-TeV BL Lac objects
Qin LH(秦龙华)1,2,3,4; Wang JC(王建成)1,3,4; Yang CY(杨初源)1,3,4; Yuan ZL(袁尊理)1,3,4; Mao JR(毛基荣)1,3,4; Kang, Shiju5
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2018
Volume70Issue:1
DOI10.1093/pasj/psx150
Contribution Rank第1完成单位
Indexed BySCI
KeywordGalaxies: Active Galaxies: Jets Gamma Rays: General Radiation Mechanism: Non-thermal
Abstract

We fit the spectral energy distributions (SEDs) of 46 GeV-TeV BLLac objects in the frame of leptonic one-zone synchrotron self-Compton (SSC) model and investigate the physical properties of these objects. We use the Markov chain Monte Carlo (MCMC) method to obtain the basic parameters, such as magnetic field (B), the break energy of the relativistic electron distribution (gamma(b)'), and the electron energy spectral index. Based on the modeling results, we support the following scenarios for GeV-TeV BL Lac objects. (1) Some sources have large Doppler factors, implying other radiation mechanism should be considered. (2) Compared with flat spectrum quasars (FSRQs), GeV-TeV BL Lac objects have weaker magnetic fields and larger Doppler factors, which cause the ineffective cooling and shift the SEDs to higher bands. Their jet powers are around 4.0 x 10(45) erg s(-1), compared with radiation power, 5.0 x 10(42) erg s(-1), indicating that only a small fraction of jet power is transformed into the emission power. (3) For some BL Lacs with large Doppler factors, their jet components could have two substructures, e.g., the fast core and the slow sheath. For most GeV-TeV BL Lacs, Kelvin-Helmholtz instabilities are suppressed by their higher magnetic fields, leading to micro-variability or intro-day variability in the optical bands. (4) Combined with a sample of FSRQs, an anti-correlation between the peak luminosity, L-pk, and the peak frequency, nu(pk), is obtained, favoring the blazar sequence scenario. In addition, an anti-correlation between the jet power, P-jet, and the break Lorentz factor, gamma(b), also supports the blazar sequence.

Funding ProjectNational Natural Science Foundation of China[11673060] ; National Natural Science Foundation of China[11661161010] ; National Natural Science Foundation of China[11763005] ; Natural Science Foundation of Yunnan Province[2016FB003]
Funding OrganizationNational Natural Science Foundation of China[11673060, 11661161010, 11763005] ; Natural Science Foundation of Yunnan Province[2016FB003]
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
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0004-6264
URL查看原文
WOS IDWOS:000425504400007
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordGAMMA-RAY EMISSION ; SIMULTANEOUS MULTIWAVELENGTH OBSERVATIONS ; EXTRAGALACTIC BACKGROUND LIGHT ; SPECTRAL ENERGY-DISTRIBUTIONS ; BLACK-HOLE MASSES ; X-RAY ; CORRELATED VARIABILITY ; RAPID VARIABILITY ; RELATIVISTIC JETS ; MAGIC TELESCOPES
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12131
Collection高能天体物理研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorQin LH(秦龙华)
Affiliation1.Yunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan Province 650011, China
2.University of Chinese Academy of Sciences, No. 19, Yuquan Road, Shijingshan District, Beijing 100049, China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, Yunnan Province 650011, China
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China
5.School of Electrical Engineering, Liupanshui Normal University, Liupanshui, Guizhou, 553004, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Qin LH,Wang JC,Yang CY,et al. Using the Markov chain Monte Carlo method to study the physical properties of GeV-TeV BL Lac objects[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2018,70(1).
APA Qin LH,Wang JC,Yang CY,Yuan ZL,Mao JR,&Kang, Shiju.(2018).Using the Markov chain Monte Carlo method to study the physical properties of GeV-TeV BL Lac objects.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,70(1).
MLA Qin LH,et al."Using the Markov chain Monte Carlo method to study the physical properties of GeV-TeV BL Lac objects".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 70.1(2018).
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