The Hard X-Ray Emission of the Blazar PKS 2155-304
文献类型：期刊论文
| 作者 | Gaur, Haritma4; Chen, Liang4,5; Misra, R.1; Sahayanathan, S.2; Gu, M. F.4; Kushwaha, P.3; Dewangan, G. C.1 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2017-12-01 |
| 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 | 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. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000425475200005 |
| 源URL | [http://119.78.226.72/handle/331011/32511]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Gaur, Haritma |
| 作者单位 | 1.IUCAA, Pune, Maharashtra, India 2.Bhabha Atom Res Ctr, Astrophys Sci Div, Mumbai, Maharashtra, India 3.Univ Sao Paulo, Dept Astron, IAG, BR-05508090 Sao Paulo, Brazil 4.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China 5.Univ Chinese Acad Sci, 19A Yuquanlu, Beijing 100049, Peoples R China |
| 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]. 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.ASTROPHYSICAL JOURNAL,850(2). |
| MLA | Gaur, Haritma,et al."The Hard X-Ray Emission of the Blazar PKS 2155-304".ASTROPHYSICAL JOURNAL 850.2(2017). |
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来源：上海天文台
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