高红移时半导体的亮度、质量和恒星形成率（IAU279会议录）
Luminosities, Masses and Star Formation Rates of Galaxies at High Redshift (IAU279 conference proceedings)
摘要：
近几年来，在星系际介质（IGM）再电离期附近发现高红移（z>5）的恒星形成星系方面取得了很大进展。哈勃太空望远镜上的WFC 3和ACS相机已经使莱曼break星系得到了有力的识别，但是在z=6-8时，这个群体的紫外光度函数和恒星形成率密度似乎比z=2-4时低得多。高逃逸分数和我们目前的探测极限以下的微弱星系的巨大贡献将需要恒星形成星系来重建宇宙。我们还发现，这些星系具有蓝色的静止框架紫外线颜色，这可能表明z>5时的尘埃消光较低。已经有一些光谱学上的证据证明这些莱曼破裂星系是通过莱曼α发射的，但是我们看到这条线的星系比例在z>7时下降，这可能是由于冈恩-彼得森效应的开始（IGM对莱曼α是不透明的）。
英文摘要：
There has been great progress in recent years in discovering star forming galaxies at high redshifts (z>5), close to the epoch of reionization of the intergalactic medium (IGM). The WFC3 and ACS cameras on the Hubble Space Telescope have enabled Lyman break galaxies to be robustly identified, but the UV luminosity function and star formation rate density of this population at z=6-8 seems to be much lower than at z=2-4. High escape fractions and a large contribution from faint galaxies below our current detection limits would be required for star-forming galaxies to reionize the Universe. We have also found that these galaxies have blue rest-frame UV colours, which might indicate lower dust extinction at z>5. There has been some spectroscopic confirmation of these Lyman break galaxies through Lyman-alpha emission, but the fraction of galaxies where we see this line drops at z>7, perhaps due to the onset of the Gunn-Peterson effect (where the IGM is opaque to Lyman-alpha).
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