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X-ray flux and spectral variability of the blazar OJ 287 with Suzaku

文献类型：期刊论文

作者Zhou, Dongtao1,3; Zhang, Zhongli2,3; Gupta, Alok C.7,8,9; Kushwaha, Pankaj6; Wiita, Paul J.5; Gu, Minfeng7; Xu, Haiguang4
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2024-07-23
卷号532期号:3页码:3285-3298
关键词BL Lacertae objects: individual: OJ 287
ISSN号0035-8711
DOI10.1093/mnras/stae1722
产权排序4
英文摘要We present analyses of Suzaku XIS light curves and spectra of the BL Lac object OJ 287 with observations positioned primarily around proposed recurrent optical outbursts. The first two observations were performed in 2007 April 10-13 (epoch 1) and 2007 November 7-9 (epoch 2) that, respectively, correspond to a low and a high optical state and which, within the binary supermassive black hole model for OJ 287, precede and follow the impact flare. The last three observations, made consecutively during 2015 May 3-9 (epoch 3), were during the post-impact state of the 2013 disc impact and are the longest continuous X-ray observation of OJ 287 taken before the optical outburst in 2015 December. Intraday variability is found in both the soft (0.5-2 keV) and hard (2-10 keV) bands. The discrete correction function analysis of the light curves in both bands peaks at zero lag during epochs 2 and 3, indicating that the emission in both bands was cospatial and emitted from the same population of leptons. Power spectral densities of all three light curves are red noise dominated, with a rather wide range of power spectrum slopes. These X-ray spectra are overall consistent with power laws but with significantly different spectral indices. In the 2015 observations the X-ray spectrum softens during the flare, showing an obvious soft X-ray excess that was not evident in the 2007 observations. We discuss the implications of these observations on the jet, the possible accretion disc, and the binary supermassive black hole model proposed for the nearly periodic optical flaring of OJ 287.
WOS关键词ACTIVE GALACTIC NUCLEI ; LOG-PARABOLIC SPECTRA ; INTRADAY VARIABILITY ; BLACK-HOLE ; XMM-NEWTON ; PARTICLE-ACCELERATION ; TEV BLAZAR ; ENERGY-DISTRIBUTIONS ; OPTICAL VARIABILITY ; PKS 2155-304
资助项目National Science Foundation of China ; USA (NASA)
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001274695300004
出版者OXFORD UNIV PRESS
资助机构National Science Foundation of China ; USA (NASA)
源URL[http://ir.xao.ac.cn/handle/45760611-7/6877]  
专题研究单元未命名
通讯作者Zhang, Zhongli
作者单位1.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100012, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron & Technol, A20 Datun Rd, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
4.Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China
5.Coll New Jersey, Dept Phys, 2000 Pennington Rd, Ewing, NJ 08628 USA
6.Indian Inst Sci Educ & Res IISER Mohali, Knowledge city,Sect 81, SAS Nagar 140306, Manauli, India
7.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
8.Aryabhatta Res Inst Observat Sci ARIES, Manora Peak, Naini Tal 263001, India
9.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Peoples R China
推荐引用方式
GB/T 7714		 Zhou, Dongtao,Zhang, Zhongli,Gupta, Alok C.,et al. X-ray flux and spectral variability of the blazar OJ 287 with Suzaku[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2024,532(3):3285-3298.
APA Zhou, Dongtao.,Zhang, Zhongli.,Gupta, Alok C..,Kushwaha, Pankaj.,Wiita, Paul J..,...&Xu, Haiguang.(2024).X-ray flux and spectral variability of the blazar OJ 287 with Suzaku.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,532(3),3285-3298.
MLA Zhou, Dongtao,et al."X-ray flux and spectral variability of the blazar OJ 287 with Suzaku".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 532.3(2024):3285-3298.

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