EVIDENCE FOR SECONDARY EMISSION AS THE ORIGIN OF HARD SPECTRA IN TeV BLAZARS

被引：31

作者：

Zheng, Y. G. ^{[1
]}

Kang, T. ^{[1
]}

机构：

[1] Yunnan Normal Univ, Dept Phys, Kunming 650092, Peoples R China

来源：

ASTROPHYSICAL JOURNAL | 2013年 / 764卷 / 02期

基金：

中国国家自然科学基金;

关键词：

BL Lacertae objects: individual (1ES 1101-232); radiation mechanisms: non-thermal; EXTRAGALACTIC BACKGROUND LIGHT; GAMMA-RAY EMISSION; PHOTOHADRONIC PROCESSES; RELATIVISTIC JET; RADIATION; CONSTRAINTS; RADIO; MODEL; COMPTONIZATION; ACCELERATION;

D O I：

10.1088/0004-637X/764/2/113

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We develop a model for the possible origin of hard, very high energy (VHE) spectra from a distant blazar. In the model, both the primary photons produced in the source and secondary photons produced outside it contribute to the observed high-energy gamma-ray emission. That is, the primary photons are produced through the synchrotron self-Compton process, and the secondary photons are produced through high-energy proton interactions with background photons along the line of sight. We apply the model to a characteristic case of VHE gamma-ray emission in the distant blazar 1ES 1101-232. Assuming suitable electron and proton spectra, we obtain excellent fits to the observed spectra of this blazar. This indicated that the surprisingly low attenuation of the high-energy gamma-rays, especially the shape of the VHE gamma-ray tail of the observed spectra, can be explained by secondary gamma-rays produced in interactions of cosmic-ray protons with background photons in intergalactic space.

引用

页数：5

共 61 条

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