论文标题
基于Veritas和Fermi-lat观测值的质子加速度的证据
Evidence for proton acceleration up to TeV energies based on VERITAS and Fermi-LAT observations of the Cas A SNR
论文作者
论文摘要
我们提出了一项研究，从0.1GEV到10TEV的能量范围内的核心折叠超新星残留物的发射。我们使用65小时的Veritas数据覆盖200 GEV-10 TEV和10.8年的\ textit {fermi} -lat数据覆盖0.1-500 GEV。 \ textIt {fermi} -lat数据的光谱分析显示了$ 1.3 \ pm 0.4_ {stat} $ GEV的明显光谱曲率，该曲率与Pion Decay的预期光谱一致。在此能量上方，来自\ textit {fermi} -lat和veritas的关节频谱与简单的幂律显着偏离，并且最好由频谱指数为$ 2.17 \ pm 0.02_ {stat} $的幂律最好地描述，其截止能量为$ 2.3 \ pm 0.5_ pm 0.5_ {stat stat} $ tev。这些结果以及无线电，X射线和$γ$ -Ray数据在Leptonic和Hadroonic模型的背景下进行解释。假设有一个单区模型，我们排除了纯粹的松性场景，并得出结论，质子加速度至少需要至少6个TEV来解释观察到的$γ$ -Ray光谱。从整个多波长频谱的建模中，推导了$ b _ {\ mathrm {min}}} \ oft150 \，\ mathrm {μg} $的残余中的最小磁场。
We present a study of $γ$-ray emission from the core-collapse supernova remnant Cas~A in the energy range from 0.1GeV to 10TeV. We used 65 hours of VERITAS data to cover 200 GeV - 10 TeV, and 10.8 years of \textit{Fermi}-LAT data to cover 0.1-500 GeV. The spectral analysis of \textit{Fermi}-LAT data shows a significant spectral curvature around $1.3 \pm 0.4_{stat}$ GeV that is consistent with the expected spectrum from pion decay. Above this energy, the joint spectrum from \textit{Fermi}-LAT and VERITAS deviates significantly from a simple power-law, and is best described by a power-law with spectral index of $2.17\pm 0.02_{stat}$ with a cut-off energy of $2.3 \pm 0.5_{stat}$ TeV. These results, along with radio, X-ray and $γ$-ray data, are interpreted in the context of leptonic and hadronic models. Assuming a one-zone model, we exclude a purely leptonic scenario and conclude that proton acceleration up to at least 6 TeV is required to explain the observed $γ$-ray spectrum. From modeling of the entire multi-wavelength spectrum, a minimum magnetic field inside the remnant of $B_{\mathrm{min}}\approx150\,\mathrm{μG}$ is deduced.
