在z = 5.1处的相互作用LAE。在z= 5.07的LAE群中的幕式恒星形成
Interacting LAEs at z = 5.1. Episodic star formation in a group of LAEs at z= 5.07
摘要：
我们正在SHARDS巡天中寻找高红移低光度的莱曼α源。在预先选定的莱曼α源中，发现了2个候选源，相距3.19角秒，并且暂时处于相同的红移。在这里，我们报告的光谱确认与GTC的莱曼α发射从这对星系在一个确认的光谱红移z=5.07。此外，其中一个源正在与另一个看起来扭曲的密切同伴相互作用/合并。根据光谱学和其他光度数据的分析，我们推断这些天体的大部分恒星质量是在1亿年前的恒星形成爆发中聚集起来的。需要一个更近的爆发（200万年前）来解释测量到的莱曼α通量。我们认为，这两个星系是莱曼阿尔法源经历情节恒星形成的很好的例子。此外，这些源很可能构成一组相互作用的莱曼α辐射源（LAEs）。
英文摘要：
We are undertaking a search for high-redshift low luminosity Lyman Alpha sources in the SHARDS survey. Among the pre-selected Lyman Alpha sources 2 candidates were spotted, located 3.19 arcsec apart, and tentatively at the same redshift. Here we report on the spectroscopic confirmation with GTC of the Lyman Alpha emission from this pair of galaxies at a confirmed spectroscopic redshifts of z=5.07. Furthermore, one of the sources is interacting/merging with another close companion that looks distorted. Based on the analysis of the spectroscopy and additional photometric data, we infer that most of the stellar mass of these objects was assembled in a burst of star formation 100 Myr ago. A more recent burst (2 Myr old) is necessary to account for the measured Lyman Alpha flux. We claim that these two galaxies are good examples of Lyman Alpha sources undergoing episodic star formation. Besides, these sources very likely constitute a group of interacting Lyman Alpha emitters (LAEs).
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