GeV-TeV gamma-ray energy spectral break of BL Lac objects
GeV-TeV gamma-ray energy spectral break of BL Lac objects
复制标题
BL Lac 天体的 GeV-TeV 伽马射线能谱断裂
DOI：
10.1007/s10509-018-3397-8
复制
发表时间：
2018
影响因子：
1.9
通讯作者：
Zheng Y. G.
中科院分区：
文献类型：
--
作者：
Zhong W.;Liu W. G.;Zheng Y. G.
在本文中，我们汇编了43 BL Lac天体的甚高能和高能谱指数。基于一个简单的数学模型，我们提出了证据的起源所观察到的光谱中断，这是由所观察到的甚高能量和高能量的光谱指数之间的差异表示。通过线性回归分析，我们发现.这些结果表明河外背景光衰减和内禀曲率对BL Lac天体的GeV-TeV射线能谱突变起主导作用。我们认为河外背景光的衰减是观测到的光谱突变红移演化的唯一解释。
In this paper, we compile the very-high-energy and high-energy spectral indices of 43 BL Lac objects from the literature. Based on a simple math model,, we present evidence for the origin of an observed spectral break that is denoted by the difference between the observed very-high-energy and high-energy spectral indices,. We find by linear regression analysis thatand. These results suggest that the extragalactic background light attenuation and the intrinsic curvature dominate on the GeV-TeV-ray energy spectral break of BL Lac objects. We argue that the extragalactic background light attenuation is an exclusive explanation for the redshift evolution of the observed spectral break.