论文标题
带有Hetdex ly $α$ emitters和Eboss QSO的宇宙学3D HI GAS地图$ Z = 2 $：Igm-Galaxy/QSO连接和$ \ sim $ 40-mpc scale巨型巨人HII泡沫候选人
Cosmological 3D HI Gas Map with HETDEX Ly$α$ Emitters and eBOSS QSOs at $z=2$: IGM-Galaxy/QSO Connection and a $\sim$ 40-Mpc Scale Giant HII Bubble Candidate
论文作者
论文摘要
我们介绍了宇宙学（$ 30-400 $ MPC）的中性氢（HI）分布在以$ $α$ emitters（LAES）和QSO $ z = 2.1-2.5 $追踪的循环培养基（IGM）中，并根据正在进行的Hobby-Esherby-eberby-eberby-eberby-eberby-eberby-eberby-telescope Dark Energiment（HETOSS）和Eboss调查（HETSDEX）和QSOS选择。我们研究了LAE和QSO的空间相关性与HI层表术图分别从HI $α$森林吸收中重建的HI层析成像图中分别在背景星系和QSO的光谱中分别由Clamato调查和这项研究获得的QSO。在远离QSO的宇宙学量中，我们发现Laes居住在强大的HI吸收区域，即Hi Rich，这与以前的Galaxy-Background QSO对研究的结果一致。此外，在横向和视线距离的Hi-Distripution图中有一个各向异性。平均而言，HI吸收峰会由$ \ sim 200 $ km s $ s $^{ - 1} $从LAE $ ly $α$ REDSHIFT中获得，从而再现已知的平均速度偏移，而ly $α$降低了$α$发射红移和银河系的系统性红速。我们已经确定了$ \ sim $ 40-mpc的缩放量的HI低度，这是巨型HII气泡的候选者，其中有6个QSO和LAE过度密度存在于$ \ left <z \ right> = 2.16 $。 QSO和LAE过度与HI不足的巧合表明，QSO的电离光子辐射在物质过度密度中创造了高度电离的多个接近区。我们的结果表明，当QSO出现在星系中时，星系中过度密度的HI气体在高度光电等中变得高度光电。
We present cosmological ($30-400$ Mpc) distributions of neutral hydrogen (HI) in the inter-galactic medium (IGM) traced by Ly$α$ Emitters (LAEs) and QSOs at $z=2.1-2.5$, selected with the data of the on-going Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) and the eBOSS survey. We investigate spatial correlations of LAEs and QSOs with HI tomography maps reconstructed from HI Ly$α$ forest absorption in the spectra of background galaxies and QSOs obtained by the CLAMATO survey and this study, respectively. In the cosmological volume far from QSOs, we find that LAEs reside in regions of strong HI absorption, i.e. HI rich, which is consistent with results of previous galaxy-background QSO pair studies. Moreover, there is an anisotropy in the HI-distribution plot of transverse and line-of-sight distances; on average the HI absorption peak is blueshifted by $\sim 200$ km s$^{-1}$ from the LAE Ly$α$ redshift, reproducing the known average velocity offset between the Ly$α$ emission redshift and the galaxy systemic redshift. We have identified a $\sim$ 40-Mpc scale volume of HI underdensity that is a candidate for a giant HII bubble, where six QSOs and an LAE overdensity exist at $\left < z \right > =2.16$. The coincidence of the QSO and LAE overdensities with the HI underdensity indicates that the ionizing photon radiation of the QSOs has created a highly ionized volume of multiple proximity zones in a matter overdensity. Our results suggest an evolutionary picture where HI gas in an overdensity of galaxies becomes highly photoionized when QSOs emerge in the galaxies.
