论文标题
Cassiopeia a高能辐射的不对称模型
An Asymmetrical Model for High Energy Radiation of Cassiopeia A
论文作者
论文摘要
Cassiopeia A（CAS A）超新星残留物显示出从无线电到伽马射线带的强辐射。 Cas A中伽马射线辐射的机制及其对PEV宇宙射线的可能贡献仍在争论中。 X射线成像揭示了Cas A的不对称曲线，表明存在类似喷气的结构。在这项工作中，我们提出了CAS A的不对称模型，该模型由快速移动的喷气样结构和缓慢膨胀的各向同性壳组成。该模型可以说明CAS的多波长光谱，尤其是对于$ \ sim $ \ sim $ 60至220 keV的幂律硬X射线光谱。 CAS A从CAS A发射的GEV应由Hadronic和Leptonic过程贡献。此外，类似喷射的结构可能会产生$ \ sim 10^{ - 13} \ rm erg \ cm^{ - 2} \ s^{ - 1} $ at $ \ sim 100 $ tev，由Lhaaso和CTA检查。
Cassiopeia A (Cas A) supernova remnant shows strong radiation from radio to gamma-ray bands. The mechanism of gamma-ray radiation in Cas A and its possible contribution to PeV cosmic rays are still under debate. The X-ray imaging reveals an asymmetric profile of Cas A, suggesting the existence of a jet-like structure. In this work, we propose an asymmetrical model for Cas A, consisting of a fast moving jet-like structure and a slowly expanding isotropic shell. This model can account for the multi-wavelength spectra of Cas A, especially for the power-law hard X-ray spectrum from $\sim$ 60 to 220 keV. The GeV to TeV emission from Cas A should be contributed by both hadronic and leptonic processes. Moreover, the jet-like structure may produce a gamma-ray flux of $\sim 10^{-13}\rm erg\ cm^{-2}\ s^{-1}$ at $\sim 100$ TeV, to be examined by LHAASO and CTA.
