标题： 再电离期间阻尼翼的特征形状 显示英文标题

标题： The Characteristic Shape of Damping Wings During Reionization

摘要： 光谱分析明亮源在$z>6$处的 Ly$\alpha$阻尼翼是测量宇宙再电离历史的一种有前途的方法。 然而，由于再电离过程的不均匀性和明亮源的邻近效应，阻尼翼的理论解释具有挑战性。 在本文中，我们分析了来自辐射传输宇宙再电离计算机模拟套件 Cosmic Reionization on Computers (CROC) 中中性区域的阻尼翼。 我们发现，阻尼翼轮廓仍然是体积加权中性分数$\left< x_{\rm HI} \right>_{\rm v}$的紧密函数，尤其是在$\left< x_{\rm HI} \right>_{\rm v}>0.5$的情况下，尽管再电离具有斑块特性以及邻近效应。 这种小的散射表明，通过精确测量的阻尼翼轮廓，我们可以在再电离的前半段将体积加权中性分数限制到$\Delta \left< x_{\rm HI} \right>_{\rm v} \lesssim 0.1$的精度。 显示英文摘要

摘要： Spectroscopic analysis of Ly$\alpha$ damping wings of bright sources at $z>6$ is a promising way to measure the reionization history of the universe. However, the theoretical interpretation of the damping wings is challenging due to the inhomogeneous nature of the reionization process and the proximity effect of bright sources. In this Letter, we analyze the damping wings arising from the neutral patches in the radiative transfer cosmological simulation suite Cosmic Reionization on Computers (CROC). We find that the damping wing profile remains a tight function of volume-weighted neutral fraction $\left< x_{\rm HI} \right>_{\rm v}$, especially when $\left< x_{\rm HI} \right>_{\rm v}>0.5$, despite the patchy nature of reionization and the proximity effect. This small scatter indicates that with a well-measured damping wing profile, we could constrain the volume-weighted neutral fraction as precise as $\Delta \left< x_{\rm HI} \right>_{\rm v} \lesssim 0.1$ in the first half of reionization.