Quests for Primeval Galaxies: A Review of Optical Surveys
Quests for Primeval Galaxies: A Review of Optical Surveys
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寻找原始星系：光学巡天回顾
DOI：
10.1007/978-94-009-4598-2_33
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发表时间：
1986
期刊：
影响因子：
--
通讯作者：
D. Koo
中科院分区：
文献类型：
--
作者：
D. Koo
我们回顾了为探测单个原始星系的连续或线发射而设计的光学巡天。除了这样的搜索之外，最近对非常微弱的类星体、射电源和星系的各种红移调查也有助于限制星系诞生时的时代、数量和亮度。一些具有窄发射线的高红移天体的偶然发现是诱人的。目前最强的限制来自空白天空的长缝光谱，以寻找莱曼发射。缺乏积极的探测表明星系形成发生在红移z bbb50，这一结果与在亮度低于B = 20的类星体样本中缺乏原始星系一致，也与适合微弱星系数量和颜色的模型所预测的温和演化相一致。
Optical surveys explicitly designed to detect continuum or line emission from individual primeval galaxies are reviewed. In addition to such searches, a variety of recent redshift surveys of very faint quasars, radio sources, and galaxies are also useful in constraining the epoch, number, and brightness of galaxies during their birth. The serendipity discoveries of a few high-redshift objects with narrow emission lines are tantalizing. Presently the strongest constraints come from long-slit spectroscopy of blank sky to search for Lyman a emission. The lack of positive detections suggests that galaxy formation occurred at redshifts z > 5, a result consistent with the lack of primeval galaxies among samples of quasars fainter than B = 20 and with the mild evolution predicted by models that fit faint galaxy counts and colors.