Two components model for TeV gamma-ray emission from extreme high-energy BL Lac objects | |
Dong, Q.1; Zheng, Y. G.1; Yang CY(杨初源)2 | |
刊名 | ASTROPHYSICS AND SPACE SCIENCE |
2021-04-01 | |
卷号 | 366期号:4页码:11 |
关键词 | gamma-ray emission high-energy radiation mechanisms non-thermal BL Lacertae objects |
ISSN号 | 0004-640X |
DOI | 10.1007/s10509-021-03938-2 |
产权排序 | 第2完成单位 |
文献子类 | Article |
英文摘要 | Extreme high-energy peaked BL Lac objects (EHBLs) are an emerging class of blazars with exceptional spectral properties, e.g., enhanced emission in the hard X-ray region and a hard spectrum at very high gamma-ray energies. Currently, no suitable model exists to explain the high-energy radiation mechanism of EHBLs. Here we apply a new model of the emission process to describe the Spectral Energy Distribution (SED) of EHBLs composed of two separate components. The internal component occurs in the jet, describes synchrotron radiation and inverse Compton (IC) scattering of ultra-relativistic electrons; the two processes produce two humps of SED. The external component occurs out of the jet and considers the interaction of the proton accelerated in the jet with the cosmic microwave background (CMB), which generates electron pairs and, in turn, a cascade spectrum due to the IC scattering of those pairs with soft photons. We reproduce the SED of eight EHBLs by finding suitable values of the parameters, meanwhile, compare the gamma-ray flux with the sensitivity of Large High Altitude Air Shower Observatory (LHAASO) and verify if these objects will be observable with LHAASO. Furthermore, we discuss the influence of intergalactic magnetic fields (IGMFs) of strength 5 x 10(-18) G <= B-IG <= 5x10(-14) G and the region of proton's turbulence acceleration. Finally, we find that the model may be employed to explain the high-energy emission mechanism and predict that LHAASO may detect the high-energy data of 1ES 0347-121, 1ES 1218+304, 1ES 1959+650, 1ES 2344+514 and RGB J0710+591 in the near future. |
学科主题 | 天文学 ; 天体物理学 ; 高能天体物理学 |
URL标识 | 查看原文 |
出版地 | VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS |
资助项目 | National Natural Science Foundation of China[11763005] ; National Natural Science Foundation of China[11873043] ; National Natural Science Foundation of China[U2031111] ; Yunnan Normal University Postgraduate Innovation Research Fund |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | SPRINGER |
WOS记录号 | WOS:000637764000001 |
资助机构 | National Natural Science Foundation of China[11763005, 11873043, U2031111] ; Yunnan Normal University Postgraduate Innovation Research Fund |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24282] |
专题 | 云南天文台_高能天体物理研究组 |
通讯作者 | Zheng, Y. G. |
作者单位 | 1.Department of Physics, Yunnan Normal University, Kunming, Yunnan, 650092, China 2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China |
推荐引用方式 GB/T 7714 | Dong, Q.,Zheng, Y. G.,Yang CY. Two components model for TeV gamma-ray emission from extreme high-energy BL Lac objects[J]. ASTROPHYSICS AND SPACE SCIENCE,2021,366(4):11. |
APA | Dong, Q.,Zheng, Y. G.,&Yang CY.(2021).Two components model for TeV gamma-ray emission from extreme high-energy BL Lac objects.ASTROPHYSICS AND SPACE SCIENCE,366(4),11. |
MLA | Dong, Q.,et al."Two components model for TeV gamma-ray emission from extreme high-energy BL Lac objects".ASTROPHYSICS AND SPACE SCIENCE 366.4(2021):11. |
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