论文标题
J1000+0234周围的Ly $α$，CIV和HEII NEBULAE：一个星系对的星系对$ z = 4.5 $
The Ly$α$, CIV, and HeII nebulae around J1000+0234: a galaxy pair at the center of a galaxy overdensity at $z=4.5$
论文作者
论文摘要
ly $α$ $λ$ 1216（ly $α$）排放超过$ \ gtrsim \，\ rm 10 \，kiloparsec \，（kpc）$周围的dusty，巨大的巨大starbursts以$ z \ gtrsim3 $ 3 $可能代表了一个短期的阶段，这可能代表着呈现的日子，质量是巨大的，质量为quies quies quies quies quies quies quies quies quies quies quies quies eiens quies quies eiens quies eiens quies eienscentencecent。为了在这种新兴方案上获得经验约束，我们将介绍$α$，civ $λ$ 1550（civ）和heii $λ$ 1640（heii）观察（heii）的观察结果，该观察器与多单位光谱探索者倾向于J1000 $+$+$ 0234：$ 0234：$ 0234：$ z = 4.5 $ comps = 4.5 $ comps of Z = 4.5 $ comps os a low-Mass a s a low-mass star star starbur （J1000 $+$ 0234 $ - $ SOUTH）邻近一个巨大的亚毫米银（SMG; J1000 $+$ 0234 $ - $ NORNE），该固定在旋转支持的气盘。基于$α$，civ和heii的空间分布和相对强度，我们发现J1000+0234 $ - $ - 南方的星形形成和J1000+0234 $ - $ north中的主动银河核是驱动观察到的40千万列$ $ $ ly $α$α$α$ blob（实验室）的主要因素。我们使用非共振HEII线来推断实验室的运动学信息。我们发现两个在空间和频谱分离的HEII区域的边际证据，这表明两台的LY $α$概况主要是两个重叠和可能相互作用的HI云的结果。我们还报告了跨越红移bin $Δz\ leq 0.007 $（即，$ \ lyseSim 380 \，\ rm km \，s^{ - 1} $）的三个ly $α$发射器的偶然识别位于$ \ simsim 140 \，rm km km km \ rm km \ rm km \ rm km \ rm km \ rm km \ rm km \ rm \ rmsim \ rm kpc $ rm kpc $ rm k1000+0233.1000。星系过度密度分析证实，J1000+0234位于Megaparsec-Scale Galaxy过度密度的中心附近，$ z = 4.5 $，可能会演变成$ z = 0 $的星系群。 J1000+0234及其大规模环境的性质增强了实验室内的SMG之间的联系，追踪了过度密度的区域，作为星系簇中局部巨大椭圆形的祖细胞。
Ly$α$ $λ$1216 (Ly$α$) emission extending over $\gtrsim\,\rm 10\,kiloparsec\,(kpc)$ around dusty, massive starbursts at $z\gtrsim3$ might represent a short-lived phase in the evolution of present-day, massive quiescent galaxies. To obtain empirical constraints on this emerging scenario, we present Ly$α$, CIV $λ$1550 (CIV), and HeII $λ$1640 (HeII) observations taken with the Multi Unit Spectroscopic Explorer towards J1000$+$0234: a galaxy pair at $z=4.5$ composed of a low-mass starburst (J1000$+$0234$-$South) neighboring a massive Submillimeter Galaxy (SMG; J1000$+$0234$-$North) that harbors a rotationally supported gas disk. Based on the spatial distribution and relative strength of Ly$α$, CIV, and HeII, we find that star formation in J1000+0234$-$South and an active galactic nucleus in J1000+0234$-$North are dominant factors in driving the observed 40 kiloparsec-scale Ly$α$ blob (LAB). We use the non-resonant HeII line to infer kinematic information of the LAB. We find marginal evidence for two spatially and spectrally separated HeII regions, which suggests that the two-peaked Ly$α$ profile is mainly a result of two overlapping and likely interacting HI clouds. We also report the serendipitous identification of three Ly$α$ emitters spanning over a redshift bin $Δz \leq 0.007$ (i.e., $\lesssim 380\,\rm km\,s^{-1}$) located at $\lesssim 140\,\rm kpc$ from J1000+0234. A galaxy overdensity analysis confirms that J1000+0234 lies near the center of a Megaparsec-scale galaxy overdensity at $z= 4.5$ that might evolve into a galaxy cluster at $z=0$. The properties of J1000+0234 and its large-scale environment strengthen the link between SMGs within LABs, tracing overdense regions, as the progenitors of local massive ellipticals in galaxy clusters.
