论文标题
向银河迷你Starburst W43的弥漫性伽马射线排放
The diffuse gamma-ray emission toward the Galactic mini starburst W43
论文作者
论文摘要
在本文中，我们报告了Fermi大面积望远镜（LAT）检测对年轻恒星形成W43的伽马射线发射。使用最新的源目录和漫射背景模型，检测到扩展的伽马射线过剩，其重要性约为16 $σ$。伽马射线排放的光子指数为$ 2.3 \ pm 0.1 $。我们还考虑了对HI气柱密度的不透明度校正，对该区域中的气体含量进行了详细的分析。估计总宇宙射线（CR）质子能为$ 10^{48} \ \ rm ERG，假设伽马射线是通过加速质子和核与环境气体的相互作用产生的。将该区域与我们银河系中的其他恒星形成区域进行比较，我们发现CR光度与风能的相关性比恒星形成速率（SFR）更好。该结果表明，在这些系统中，CRS主要通过恒星风加速
In this paper we report the Fermi Large Area Telescope (LAT) detection of the gamma-ray emission toward the young star forming region W43. Using the latest source catalog and diffuse background models, the extended gamma-ray excess is detected with a significance of about 16 $σ$. The gamma-ray emission has a spectrum with a photon index of $2.3 \pm 0.1$. We also performed a detailed analysis of the gas content in this region by taking into account the opacity correction to the HI gas column density. The total cosmic-ray (CR) proton energy is estimated to be on the order of $10^{48}\ \rm erg,$ assuming the gamma-ray are produced from the interaction of the accelerated protons and nuclei with the ambient gas. Comparing this region to the other star formation regions in our Galaxy, we find that the CR luminosity is better correlated with the wind power than the star formation rate (SFR). This result suggests that CRs are primarily accelerated by stellar wind in these systems
