The Hard X-Ray Emission of the Blazar PKS 2155–304
文献类型：期刊论文
| 作者 | Gaur,Haritma2; Chen,Liang1,2; Misra,R.5; Sahayanathan,S.4; Gu,M. F.2; Kushwaha,P.3; Dewangan,G. C.5 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2017-12-04 |
| 卷号 | 850期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | BL Lacertae objects: general BL Lacertae objects: individual (PKS 2155–304) galaxies: active |
| DOI | 10.3847/1538-4357/aa95bc |
| 英文摘要 | Abstract The synchrotron peak of the X-ray bright High Energy Peaked Blazar PKS 2155–304 occurs in the UV-EUV region and hence its X-ray emission (0.6–10 keV) lies mostly in the falling part of the synchrotron hump. We aim to study the X-ray emission of PKS 2155–304 during different intensity states in 2009–2014 using the XMM-Newton?satellite. We studied the spectral curvature of all of the observations to provide crucial information on the energy distribution of the nonthermal particles. Most of the observations show curvature or deviation from a single power law and can be well modeled by a log parabola model. In some of the observations, we find spectral flattening after 6 keV. In order to find the possible origin of the X-ray excess, we built the Multiband Spectral Energy distribution. We find that the X-ray excess in PKS 2155–304 is difficult to fit in the one zone model but, could be easily reconciled in the spine/layer jet structure. The hard X-ray excess can be explained by the inverse Comptonization of the synchrotron photons (from the layer) by the spine electrons. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-850-2-AA95BC |
| 源URL | [http://119.78.226.72/handle/331011/32097]  |
| 专题 | 中国科学院上海天文台 |
| 作者单位 | 1.University of Chinese Academy of Science, 19A Yuquanlu, Beijing 100049, China; chenliang@shao.ac.cn 2.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China; haritma@shao.ac.cn 3.Department of Astronomy (IAG-USP), University of Sao Paulo, Sao Paulo 05508-090, Brazil 4.Astrophysical Sciences Divison, Bhabha Atomic Research Center, Mumbai, India 5.Inter-University Centre of Astronomy and Astrophysics (IUCAA), India |
| 推荐引用方式 GB/T 7714 | Gaur,Haritma,Chen,Liang,Misra,R.,et al. The Hard X-Ray Emission of the Blazar PKS 2155–304[J]. The Astrophysical Journal,2017,850(2). |
| APA | Gaur,Haritma.,Chen,Liang.,Misra,R..,Sahayanathan,S..,Gu,M. F..,...&Dewangan,G. C..(2017).The Hard X-Ray Emission of the Blazar PKS 2155–304.The Astrophysical Journal,850(2). |
| MLA | Gaur,Haritma,et al."The Hard X-Ray Emission of the Blazar PKS 2155–304".The Astrophysical Journal 850.2(2017). |
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来源：上海天文台
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