Spectroscopic Monitoring of Blazar S5 0716+714: Brightness-dependent Spectral Behavior | |
Feng HC(封海诚)2,3,4; Yang, Sen3,5; Yang, Zi-Xu3,5; Liu HT(刘洪涛)2,4,6; Bai JM(白金明)2,4,6; Li, Sha-Sha3,5; Zhao XH(赵晓红)2,4,6; Zhang, Jin1; Li YB(李宇斌)2,3,4; Xiao, M.5 | |
刊名 | ASTROPHYSICAL JOURNAL |
2020-10-01 | |
卷号 | 902期号:1页码:7 |
关键词 | Active galactic nuclei BL Lacertae objects Blazars Relativistic jets Spectroscopy |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/abb366 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | In this paper, we report new results of spectroscopic observations of gamma-ray blazar S5 0716+714 from 2019 September to 2020 March with the 2.4 m optical telescope at Lijiang Observatory of Yunnan Observatories. The median cadence of observations is similar to 1 day. During the second observation period (Epoch2), the observational data reveal an extremely bright state and a bluer-when-brighter (BWB) chromatism. The BWB trend of Epoch2 differs significantly from that of the first observation period (Epoch1). A significantly brightness-dependent BWB chromatism emerges in the total data of Epoch1 and Epoch2. The BWB trend becomes weaker toward the brighter states, and likely becomes saturated at the highest state. Based on a log-parabolic function, a power law of synchrotron peak flux and frequency nu(p), and a power law of the curvature of synchrotron spectrum and its nu(p), simulation well reproduces the brightness-dependent BWB trend of S5 0716+714. The BWB trend is seemingly controlled by the shift of nu(p)with respect to the observational window, and effectively may be dominated by the variations of electron average energy and magnetic field in the emitting region. |
学科主题 | 天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
资助项目 | Key Research Program of the Chinese Academy of Sciences (CAS)[KJZD-EWM06] ; National Natural Science Foundation of China (NSFC)[11433004] ; National Natural Science Foundation of China (NSFC)[11991051] ; National Natural Science Foundation of China (NSFC)[11703077] ; National Natural Science Foundation of China (NSFC)[11573067] ; National Natural Science Foundation of China (NSFC)[11973050] ; Ministry of Science and Technology of China[2016YFA0400700] ; NSFC[U1831125] ; NSFC[U1331118] ; NSFC[U1831135] ; CAS[U1831125] ; CAS[U1331118] ; CAS[U1831135] ; Chinese Academy of Sciences ; People's Government of Yunnan Province |
WOS关键词 | LOG-PARABOLIC SPECTRA ; X-RAY-SPECTRA ; PARTICLE-ACCELERATION ; ELECTRON ACCELERATION ; XMM-NEWTON ; EMISSION ; BEPPOSAX ; BAND ; VARIABILITY |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000576555100001 |
资助机构 | Key Research Program of the Chinese Academy of Sciences (CAS)[KJZD-EWM06] ; National Natural Science Foundation of China (NSFC)[11433004, 11991051, 11703077, 11573067, 11973050] ; Ministry of Science and Technology of China[2016YFA0400700] ; NSFC[U1831125, U1331118, U1831135] ; CAS[U1831125, U1331118, U1831135] ; Chinese Academy of Sciences ; People's Government of Yunnan Province |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/23820] |
专题 | 云南天文台_丽江天文观测站(南方基地) |
通讯作者 | Feng HC(封海诚) |
作者单位 | 1.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, Yunnan, People's Republic of China 3.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China 4.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, Yunnan, People's Republic of China 5.Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, People's Republic of China 6.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China |
推荐引用方式 GB/T 7714 | Feng HC,Yang, Sen,Yang, Zi-Xu,et al. Spectroscopic Monitoring of Blazar S5 0716+714: Brightness-dependent Spectral Behavior[J]. ASTROPHYSICAL JOURNAL,2020,902(1):7. |
APA | Feng HC.,Yang, Sen.,Yang, Zi-Xu.,Liu HT.,Bai JM.,...&He SS.(2020).Spectroscopic Monitoring of Blazar S5 0716+714: Brightness-dependent Spectral Behavior.ASTROPHYSICAL JOURNAL,902(1),7. |
MLA | Feng HC,et al."Spectroscopic Monitoring of Blazar S5 0716+714: Brightness-dependent Spectral Behavior".ASTROPHYSICAL JOURNAL 902.1(2020):7. |
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