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 | |
刊名 | The Astrophysical Journal
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2017-06-07 | |
卷号 | 842期号:1 |
关键词 | Galaxies: jets gamma rays: galaxies radiation mechanisms: non-thermal |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/aa7465 |
英文摘要 | Abstract 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. |
语种 | 英语 |
出版者 | The American Astronomical Society |
WOS记录号 | IOP:0004-637X-842-1-AA7465 |
内容类型 | 期刊论文 |
源URL | [http://libir.pmo.ac.cn/handle/332002/23782] ![]() |
专题 | 中国科学院紫金山天文台 |
作者单位 | 1.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 |
推荐引用方式 GB/T 7714 | Zhang,Peng-fei,Yan,Da-hai,Liao,Neng-hui,et al. 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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