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Testing Relativistic Boost as the Cause of Gamma-Ray Quasi-periodic Oscillation in a Blazar
Yan DH(闫大海)1,2; Zhou, Jianeng3; Zhang, Pengfei4,5; Zhu, Qianqian6; Wang JC(王建成)1,2
Source PublicationASTROPHYSICAL JOURNAL
2018-11-01
Volume867Issue:1Pages:7
DOI10.3847/1538-4357/aae48a
Contribution Rank第1完成单位
Indexed BySCI
Keywordgalaxies: jets gamma rays: galaxies radiation mechanisms: non-thermal
Abstract

The mechanism for producing gamma-ray quasi-periodic oscillation (QPO) in blazars is unknown. One possibility is the geometric model, in which without the need for intrinsic quasi-periodic variation, the relativistic Doppler factor changes periodically, resulting in observed gamma-ray QPO. We propose a method to test this geometric model. We analyze the Fermi-LAT data of PG 1553+113 spanning from 2008 August until 2018 February. According to 29 four-month average spectral energy distributions in the energy range of 0.1-300 GeV, we split the Fermi-LAT energy range into three bands: 0.1-1 GeV, 1-10 GeV, and 10-300 GeV. The spectrum in each energy range can be successfully fitted by a power law. The light curves and photon indices in the three energy ranges are obtained. Then, light curves in three narrow energy ranges, i.e., 0.2-0.5 GeV, 2-5 GeV, and 20-40 GeV, are constructed, and the relative variability amplitudes in the three narrow energy ranges are calculated. A discrete-correlation analysis is performed for the light curves. Our results indicate that (i) the light curves in the different energy ranges follow the same pattern showed in the light curve above 0.1 GeV; (ii) the three groups of photon indices in the energy ranges of 0.1-1 GeV, 1-10 GeV, and 10-300 GeV keep nearly constant; and (iii) the ratio between relative variability amplitudes in different narrow energy ranges are equal (within their errors) to the prediction by the Doppler effect. Our results support the scenario of the relativistic boost producing the gamma-ray QPO for PG 1553+113.

Funding ProjectNational Natural Science Foundation of China[NSFC-11803081] ; National Natural Science Foundation of China[NSFC-11573060] ; National Natural Science Foundation of China[NSFC-11573026] ; National Natural Science Foundation of China[NSFCU-1738124] ; National Natural Science Foundation of China[NSFC-11603059] ; National Natural Science Foundation of China[NSFC-11661161010] ; Key Laboratory of Astroparticle Physics of Yunnan Province[2016DG006] ; CAS "Light of West China" Program
Funding OrganizationNational Natural Science Foundation of China[NSFC-11803081, NSFC-11573060, NSFC-11573026, NSFCU-1738124, NSFC-11603059, NSFC-11661161010] ; Key Laboratory of Astroparticle Physics of Yunnan Province[2016DG006] ; CAS "Light of West China" Program
Language英语
Subject Area天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学
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:000448890000006
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordX-RAY ; SPECTRAL VARIABILITY ; LIGHT CURVES ; HELICAL JETS ; PG 1553+113 ; EMISSION ; GALAXIES ; PRECESSION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/18323
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 AuthorYan DH(闫大海)
Affiliation1.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China
3.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People's Republic of China
4.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China
5.Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, Kunming 650091, People's Republic of China
6.Department of General Studies, Nanchang Institute of Science & Technology, Nanchang 330108, People's Republic of China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Yan DH,Zhou, Jianeng,Zhang, Pengfei,et al. Testing Relativistic Boost as the Cause of Gamma-Ray Quasi-periodic Oscillation in a Blazar[J]. ASTROPHYSICAL JOURNAL,2018,867(1):7.
APA Yan DH,Zhou, Jianeng,Zhang, Pengfei,Zhu, Qianqian,&Wang JC.(2018).Testing Relativistic Boost as the Cause of Gamma-Ray Quasi-periodic Oscillation in a Blazar.ASTROPHYSICAL JOURNAL,867(1),7.
MLA Yan DH,et al."Testing Relativistic Boost as the Cause of Gamma-Ray Quasi-periodic Oscillation in a Blazar".ASTROPHYSICAL JOURNAL 867.1(2018):7.
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