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A γ-ray Quasi-periodic Modulation in the Blazar PKS 0301–243?
Zhang,Peng-Fei1,2; Yan,Da-Hai3,4,5; Zhou,Jia-Neng6; Fan,Yi-Zhong1; Wang,Jian-Cheng3,4,5; Zhang,Li2
2017-08-14
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume845Issue:1
AbstractAbstract We report a nominally high-confidence γ-ray quasi-periodic modulation in the blazar PKS 0301–243. For this target, we analyze its Fermi-LAT Pass 8 data from 2008 August to 2017 May. Two techniques, i.e., maximum likelihood optimization and exposure-weighted aperture photometry, are used to build the γ-ray light curves. Then, both the Lomb–Scargle periodogram and the weighted wavelet Z-transform are applied to the light curves to search for period signals. A quasi-periodicity with a period of 2.1?±?0.3 yr appears at the significance level of , although it should be noted that this putative quasi-period variability is seen in a data set that is barely four times longer. We speculate that this γ-ray quasi-periodic modulation may be evidence of a binary supermassive black hole.
KeywordBL Lacertae objects: individual (PKS 0301–243) galaxies: jets gamma-rays: galaxies gamma-rays: general
DOI10.3847/1538-4357/aa7ecd
Language英语
WOS IDIOP:0004-637X-845-1-aa7ecd
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23901
Collection中国科学院紫金山天文台
Affiliation1.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China zhangpengfee@pmo.ac.cn, yzfan@pmo.ac.cn
2.Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, Kunming 650091, China
3.Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China; yandahai@ynao.ac.cn
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China
5.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
6.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China
Recommended Citation
GB/T 7714
Zhang,Peng-Fei,Yan,Da-Hai,Zhou,Jia-Neng,等. A γ-ray Quasi-periodic Modulation in the Blazar PKS 0301–243?[J]. The Astrophysical Journal,2017,845(1).
APA Zhang,Peng-Fei,Yan,Da-Hai,Zhou,Jia-Neng,Fan,Yi-Zhong,Wang,Jian-Cheng,&Zhang,Li.(2017).A γ-ray Quasi-periodic Modulation in the Blazar PKS 0301–243?.The Astrophysical Journal,845(1).
MLA Zhang,Peng-Fei,et al."A γ-ray Quasi-periodic Modulation in the Blazar PKS 0301–243?".The Astrophysical Journal 845.1(2017).
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