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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
发表期刊ASTROPHYSICS AND SPACE SCIENCE
2021-04-01
卷号366期号:4页码:11
DOI10.1007/s10509-021-03938-2
产权排序第2完成单位
收录类别SCI
关键词gamma-ray emission high-energy radiation mechanisms non-thermal BL Lacertae objects
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.

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
项目资助者National Natural Science Foundation of China[11763005, 11873043, U2031111] ; Yunnan Normal University Postgraduate Innovation Research Fund
语种英语
学科领域天文学 ; 天体物理学 ; 高能天体物理学
学科门类理学 ; 理学::天文学
文章类型Article
出版者SPRINGER
出版地VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
ISSN0004-640X
URL查看原文
WOS记录号WOS:000637764000001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/24283
专题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
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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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