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A Quasi-periodic Oscillation in the gamma-Ray Emission from the Non-blazar Active Galactic Nucleus PKS 0521-36
Zhang, Haiyun1; Yan DH(闫大海)2; Zhang, Pengfei1; Yang, Shenbang1; Zhang, Li1
发表期刊ASTROPHYSICAL JOURNAL
2021-09
卷号919期号:1
DOI10.3847/1538-4357/ac0cf0
产权排序第2完成单位
收录类别SCI
摘要

Long-term gamma-ray variability of a non-blazar Active Galactic Nucleus PKS 0521-36 is investigated by using Fermi Large Area Telescope (Fermi-LAT) pass 8 data covering from 2008 August to 2021 March. The results show that the histogram of the gamma-ray fluxes follows a log-normal distribution. Interestingly, in the analysis of similar to 5.8 yr (from MJD 56317-58447) LAT data between two outbursts (occurring during 2012 October and 2019 May respectively), a quasi-periodic oscillation (QPO) with a period of similar to 1.1 yr (similar to 5 sigma of significance) is found in the Lomb-Scargle Periodogram (LSP), the Weighted Wavelet Z-transform, and the REDFIT results. This quasiperiodic signal also appears in the results of Gaussian process modeling the light curve. Therefore, the robustness of the QPO is examined by four different methods. This is the first gamma-ray QPO found in a mildly beamed jet. Our results imply that the gamma-ray outbursts play an important role in the formation of the gamma-ray QPO.

资助项目National Key R&D Program of China[2018YFA0404204] ; National Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11803081] ; joint foundation of Department of Science and Technology of Yunnan Province and Yunnan University[2018FY001(-003)] ; CAS Youth Innovation Promotion Association and Basic research Program of Yunnan Province[202001AW070013]
项目资助者National Key R&D Program of China[2018YFA0404204] ; National Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11803081] ; joint foundation of Department of Science and Technology of Yunnan Province and Yunnan University[2018FY001(-003)] ; CAS Youth Innovation Promotion Association and Basic research Program of Yunnan Province[202001AW070013]
语种英语
学科领域天文学 ; 天体物理学 ; 高能天体物理学
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP PUBLISHING LTD
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS记录号WOS:000698460100001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
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被引频次:15[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.ynao.ac.cn/handle/114a53/24572
专题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
通讯作者Yan DH(闫大海)
作者单位1.Department of Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, Kunming 650091, People's Republic of China lizhang@ynu.edu.cn;
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, People's Republic of China; yandahai@ynao.ac.cn
通讯作者单位中国科学院云南天文台
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Zhang, Haiyun,Yan DH,Zhang, Pengfei,et al. A Quasi-periodic Oscillation in the gamma-Ray Emission from the Non-blazar Active Galactic Nucleus PKS 0521-36[J]. ASTROPHYSICAL JOURNAL,2021,919(1).
APA Zhang, Haiyun,Yan DH,Zhang, Pengfei,Yang, Shenbang,&Zhang, Li.(2021).A Quasi-periodic Oscillation in the gamma-Ray Emission from the Non-blazar Active Galactic Nucleus PKS 0521-36.ASTROPHYSICAL JOURNAL,919(1).
MLA Zhang, Haiyun,et al."A Quasi-periodic Oscillation in the gamma-Ray Emission from the Non-blazar Active Galactic Nucleus PKS 0521-36".ASTROPHYSICAL JOURNAL 919.1(2021).
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