A Quasi-periodic Oscillation in the gamma-Ray Emission from the Non-blazar Active Galactic Nucleus PKS 0521-36

doi:10.3847/1538-4357/ac0cf0

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	A Quasi-periodic Oscillation in the gamma-Ray Emission from the Non-blazar Active Galactic Nucleus PKS 0521-36
	Zhang, Haiyun 1; Yan DH(闫大海)2 ; Zhang, Pengfei 1; Yang, Shenbang 1; Zhang, Li 1
发表期刊	ASTROPHYSICAL JOURNAL
	2021-09
卷号	919 期号:1
DOI	10.3847/1538-4357/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
文章类型	Article
出版者	IOP PUBLISHING LTD
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN	0004-637X
URL	查看原文
WOS记录号	WOS:000698460100001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
引用统计	被引频次：20[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 [email protected]; 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, People's Republic of China; [email protected]
通讯作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	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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