论文标题
Eiger I. [OIII]发射星系的大量样本为$ 5.3 <z <6.9 $，直接证据证明了星系的局部电离
EIGER I. a large sample of [OIII]-emitting galaxies at $5.3 < z < 6.9$ and direct evidence for local reionization by galaxies
论文作者
论文摘要
我们提出了第一个样本的117 [OIII] $λλ$ 4960,5008选择的星形星系，$ 5.33 <z <6.93 $在JWST/NIRCAM 3.5 $ $ m $ m $ m $ m $ m slit的光谱范围内的无slitseprospocy $ 6.5 $ 6.5 \ times 3.4 $ Arcmin $^2 $^2 $^2 $^2 $^280 y 280 y 28 0作为Eiger的一部分（在电离时期的发射线星系和播出气体）调查。观察到三个突出的星系过度，其中一个是在类星体的红移中。在此红移范围内的四个已知金属吸收线系统的200 pkpc和105 km s $^{ - 1} $内发现星系。我们关注星系在宇宙回离的后期电离周围层间培养基（IGM）中的作用，并构建平均$ ly $α$和ly $β$的传输作为距离星系距离的函数。在我们研究中最低的红移，$ 5.3 <z <5.7 $，IGM变速器以距星系距离的距离单调上升。当星系驻留在IgM的过度密度场中时，这是预期的，该峰通过或多或少均匀的电离背景电离，并且在较低的红移处看到。相比之下，$ 5.7 <z <6.14 $，ly $α$和ly $β$的传输首先随着距离而增加，但随后在5 cmpc的距离上达到峰值。在质量上，这种传播的峰值与Thesan模拟中看到的（尽管在较小的距离和较高的红移）上相似。最后，在该地区$ 6.15 <z <6.26 $中，来自类星体的额外电离辐射占主导地位，距离随距离的传输增加了。该结果被解释为表明证据表明，IgM在$ z \ sim 5.9 $向J0100+2802的传播归因于``局部''电离辐射的``局部''电离辐射，而这些星系的电离辐射在宇宙背景下占主导地位。
We present a first sample of 117 [OIII]$λλ$4960,5008-selected star-forming galaxies at $5.33 < z < 6.93$ detected in JWST/NIRCam 3.5$μ$m slitless spectroscopy of a $6.5 \times 3.4$ arcmin$^2$ field centered on the hyperluminous quasar SDSS J0100+2802, obtained as part of the EIGER (Emission-line galaxies and Intergalactic Gas in the Epoch of Reionization) survey. Three prominent galaxy overdensities are observed, one of them at the redshift of the quasar. Galaxies are found within 200 pkpc and 105 km s$^{-1}$ of four known metal absorption-line systems in this redshift range. We focus on the role of the galaxies in ionizing the surrounding intergalactic medium (IGM) during the later stages of cosmic reionization and construct the mean Ly$α$ and Ly$β$ transmission as a function of distance from the galaxies. At the lowest redshifts in our study, $5.3 < z < 5.7$, the IGM transmission rises monotonically with distance from the galaxies. This is as expected when galaxies reside at peaks in the overdensity field of an IGM that is ionized by more or less uniform ionizing background, and has been seen at lower redshifts. In contrast, at $5.7 < z < 6.14$, the transmission of both Ly$α$ and Ly$β$ first increases with distance, but then peaks at a distance of 5 cMpc before declining. This peak in transmission is qualitatively similar to that seen (albeit at smaller distances and higher redshifts) in the THESAN simulations. Finally, in the region $6.15 < z < 6.26$ where the additional ionizing radiation from the quasar dominates, the monotonic increase in transmission with distance is re-established. This result is interpreted to represent evidence that the transmission of the IGM at $z \sim 5.9$ towards J0100+2802 results from the ``local'' ionizing radiation of galaxies that dominates over the much reduced cosmic background.
