论文标题
1ES 0502+675的Fermi-LAT数据中的光谱硬化
A spectral hardening in the Fermi-LAT Data of 1ES 0502+675
论文作者
论文摘要
Blazar 1ES 0502+675的$γ$射线光谱特征通过使用费米大面积望远镜（Fermi-Lat）通过8个数据（100 MeV和300 GEV），从2008年8月至2021年4月覆盖。在中等脆弱的状态下（MJD 55050-55350），在$γ$ -RARE频谱中发现了一个重要的（$ \sim4σ$）在$ \ sim $ 1 GEV时进行的（$ \sim4σ$）。下方和上方的光子指数分别为$γ_1= 2.36 \ pm0.31 $和$γ_2= 1.33 \ pm0.11 $。在其余的观测值中，$γ$ ray频谱可以通过幂律形式描述，光子指数约为$ \ \ \ \ \ \ 1.6 $。在一个单区同步加速器自compton（SSC）模型的框架中，光谱硬化被解释为同步子组件和SSC组件之间的过渡。这可能是由于电子的断裂/最大洛伦兹因子的略有增加的结果。
The $γ$-ray spectral feature of the blazar 1ES 0502+675 is investigated by using Fermi Large Area Telescope (Fermi-LAT) Pass 8 data (between 100 MeV and 300 GeV) covering from 2008 August to 2021 April. A significant ($\sim4σ$) hardening at $\sim$ 1 GeV is found in the $γ$-ray spectrum during a moderately flaring state (MJD 55050-55350). The photon index below and above the break energy is $Γ_1=2.36\pm0.31$ and $Γ_2=1.33\pm0.11$, respectively. In the rest of the observations, the $γ$-ray spectrum can be described by a power-law form with the photon index of $\approx1.6$. In the frame of a one-zone synchrotron self-Compton (SSC) model, the spectral hardening is interpreted as the transition between the synchrotron component and the SSC component. This could be the result of a slight increase of the break/maximum Lorentz factor of the electrons.
