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题名: A gamma-ray Quasi-periodic Modulation in the Blazar PKS 0301-243?
作者: Zhang, Peng-Fei; Yan, Da-Hai; Zhou, Jia-Neng; Fan, Yi-Zhong; Wang, Jian-Cheng; Zhang, Li
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2017
卷号: 845, 期号:1, 页码:82-
英文摘要: We report a nominally high-confidence gamma-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 gamma-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 similar to 5 sigma, 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 gamma-ray quasi-periodic modulation may be evidence of a binary supermassive black hole.
语种: 英语
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/17336
Appears in Collections:暗物质和空间天文实验室_期刊论文

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