文章基本信息

标题：The MUSE Hubble Ultra Deep Field Survey - X. Lyα equivalent widths at 2.9 < z < 6.6
其他标题：X. Lyα equivalent widths at 2.9 < z < 6.6
本地全文：下载
作者：T. Hashimoto ; T. Garel ; B. Guiderdoni 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2017
卷号：608
页码：1-20
DOI：10.1051/0004-6361/201731579
语种：English
出版社：EDP Sciences
摘要：We present rest-frame Lyα equivalent widths (EW0) of 417 Lyα emitters (LAEs) detected with Multi Unit Spectroscopic Explorer (MUSE) on the Very Large Telescope (VLT) at 2.9 200 Å above 1σ uncertainties. Two of these 12 LAEs show signatures of merger or AGN activity: the weak Civλ1549 emission line. For the remaining 10 very large EW0 LAEs, we find that the EW0 values can be reproduced by young stellar ages (< 100 Myr) and low metallicities (≲ 0.02 Z⊙). Otherwise, at least part of the Lyα emission in these LAEs needs to arise from anisotropic radiative transfer effects, fluorescence by hidden AGN or quasi-stellar object activity, or gravitational cooling.
关键词：engalaxies: high-redshiftgalaxies: evolutionGalaxy: formationearly Universe