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Revisiting Quasi-periodic Modulation in γ-Ray Blazar PKS 2155-304 with Fermi Pass 8 Data
Zhang,Peng-fei1,2; Yan,Da-hai3,4,5; Liao,Neng-hui1; Wang,Jian-cheng3,4,5
2017-02-01
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume835Issue:2
AbstractAbstract We examine the gamma-ray quasi-periodic variability of PKS 2155-304 with the latest publicly available Fermi-LAT Pass 8 data, which covers the years from 2008 August to 2016 October. We produce the light curves in two ways: the exposure-weighted aperture photometry and the maximum likelihood optimization. The light curves are then analyzed by using Lomb-Scargle Periodogram (LSP) and Weighted Wavelet Z-transform, and the results reveal a significant quasi-periodicity with a period of 1.74?±?0.13 years and a significance of ~4.9σ. The constraint of multifrequencies quasi-periodic variabilities on blazar emission model is discussed.
KeywordBL Lacertae objects: individual (PKS 2155-304) galaxies: jets gamma-rays: galaxies gamma-rays: general
DOI10.3847/1538-4357/835/2/260
Language英语
WOS IDIOP:0004-637X-835-2-260
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23755
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
Recommended Citation
GB/T 7714
Zhang,Peng-fei,Yan,Da-hai,Liao,Neng-hui,et al. Revisiting Quasi-periodic Modulation in γ-Ray Blazar PKS 2155-304 with Fermi Pass 8 Data[J]. The Astrophysical Journal,2017,835(2).
APA Zhang,Peng-fei,Yan,Da-hai,Liao,Neng-hui,&Wang,Jian-cheng.(2017).Revisiting Quasi-periodic Modulation in γ-Ray Blazar PKS 2155-304 with Fermi Pass 8 Data.The Astrophysical Journal,835(2).
MLA Zhang,Peng-fei,et al."Revisiting Quasi-periodic Modulation in γ-Ray Blazar PKS 2155-304 with Fermi Pass 8 Data".The Astrophysical Journal 835.2(2017).
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