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Possible Quasi-periodic Modulation in the z?=?1.1 Gamma-Ray Blazar PKS 0426–380
Zhang,Peng-fei1,2; Yan,Da-hai3,4,5; Liao,Neng-hui1; Zeng,Wei2; Wang,Jian-cheng3,4,5; Cao,Li-Jia2
2017-06-07
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume842Issue:1
AbstractAbstract We search for γ-ray and optical periodic modulations in distant flat-spectrum radio quasar (FSRQ) PKS 0426–380 (the redshift z?=?1.1). Using two techniques (i.e., the maximum likelihood optimization and the exposure-weighted aperture photometry), we obtain γ-ray light curves from Fermi-LAT Pass 8 data covering from 2008 August to 2016 December. We then analyze the light curves with the Lomb–Scargle periodogram and the weighted wavelet Z-transform. A γ-ray quasi-periodicity with a period of 3.35?±?0.68 yr is found at the significance level of . The optical–UV flux covering from 2005 August to 2013 April provided by the ASI Science Data Center is also analyzed, but no significant quasi-periodicity is found. It should be pointed out that the result of the optical–UV data could be tentative because of the incompleteness of the data. Further long-term multiwavelength monitoring of this FSRQ is needed to confirm its quasi-periodicity.
KeywordGalaxies: jets gamma rays: galaxies radiation mechanisms: non-thermal
DOI10.3847/1538-4357/aa7465
Language英语
WOS IDIOP:0004-637X-842-1-aa7465
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23783
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
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
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GB/T 7714
Zhang,Peng-fei,Yan,Da-hai,Liao,Neng-hui,等. Possible Quasi-periodic Modulation in the z?=?1.1 Gamma-Ray Blazar PKS 0426–380[J]. The Astrophysical Journal,2017,842(1).
APA Zhang,Peng-fei,Yan,Da-hai,Liao,Neng-hui,Zeng,Wei,Wang,Jian-cheng,&Cao,Li-Jia.(2017).Possible Quasi-periodic Modulation in the z?=?1.1 Gamma-Ray Blazar PKS 0426–380.The Astrophysical Journal,842(1).
MLA Zhang,Peng-fei,et al."Possible Quasi-periodic Modulation in the z?=?1.1 Gamma-Ray Blazar PKS 0426–380".The Astrophysical Journal 842.1(2017).
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