论文标题
HETDEX调查I：Goods-N Field中的LAES分析Lyman-Alpha发射星系的恒星种群
Stellar Populations of Lyman-alpha Emitting Galaxies in the HETDEX Survey I: An Analysis of LAEs in the GOODS-N Field
论文作者
论文摘要
我们介绍了lyman-alpha发射星系（LAES）在1.9 <z <z <3.5的lyman-alpha发射星系（LAES）的恒星群体分析的结果。我们提供了一种将发射线检测从盲目调查连接到成像对应物的方法，这是HETDEX构建约100万个Lyman-Alpha检测的大量数据库所需的关键工具。使用涵盖Hubble和Spitzer空间望远镜的0.4-4.5微米的9个过滤器的光度数据，我们研究对象的全球性质并探索哪些特性会影响Lyman-Alpha发射的强度。我们测量的恒星质量为0.8（^+2.9_-0.5）X 10^9 MSOL，得出结论，HetDEX光谱镜的LAE的物理特性与先前的深窄带研究选择的LAE相当。我们发现恒星质量和恒星形成率与莱曼 - 阿尔法当量宽度密切相关。然后，我们使用已知的Z> 7 LAE样本来进行原始研究，以预测电离时代中星系中的莱曼 - α发射，在大多数强发出者的预测和观察之间找到一致的一致性。
We present the results of a stellar-population analysis of Lyman-alpha emitting galaxies (LAES) in GOODS-N at 1.9 < z < 3.5 spectroscopically identified by the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). We provide a method for connecting emission-line detections from the blind spectroscopic survey to imaging counterparts, a crucial tool needed as HETDEX builds a massive database of ~1 million Lyman-alpha detections. Using photometric data spanning as many as 11 filters covering 0.4-4.5 microns from the Hubble and Spitzer Space Telescopes, we study the objects' global properties and explore which properties impact the strength of Lyman-alpha emission. We measure a median stellar mass of 0.8 (^+2.9_-0.5) x 10^9 Msol and conclude that the physical properties of HETDEX spectroscopically-selected LAEs are comparable to LAEs selected by previous deep narrow band studies. We find that stellar mass and star formation rate correlate strongly with the Lyman-alpha equivalent width. We then use a known sample of z>7 LAEs to perform a proto-study of predicting Lyman-alpha emission from galaxies in the Epoch of Reionization, finding agreement at the 1-sigma level between prediction and observation for the majority of strong emitters.
