Color-selected Galaxies at z ≈ 6 in the Great Observatories Origins Deep Survey
Color-selected Galaxies at z ≈ 6 in the Great Observatories Origins Deep Survey
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大天文台起源深度巡天中 z ≈ 6 处的颜色选择星系
DOI：
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发表时间：
2003
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影响因子：
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通讯作者：
Padova
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文献类型：
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作者：
M. Dickinson;D. Stern;M. Giavalisco;H. Ferguson;Z. Tsvetanov;R. Chornock;S. Cristiani;S. Dawson;A. Dey;A. Filippenko;L. Moustakas;M. Nonino;C. Papovich;S. Ravindranath;A. P. Rosati;H. Spinrad;E. V. STScI;Jpl;Jhu;U. Berkeley;O. Trieste;Noao;S. Obs.;Eso;Padova
本文报道了大天文台起源深空巡天的哈勃空间望远镜图像中z ~ 6星系的早期结果。凯克和甚大望远镜观测站使用高级巡天相机棱镜对一个天体进行的光谱分析显示，该天体有一个强烈的连续中断和不对称线发射，被确定为z = 5.83的Lyα。我们发现只有五个空间扩展的候选人的信噪比大于10，其中两个光谱确认。如果z = 6的星系与z = 3的星系具有相同的光度函数，那么这个数值要比预期的小得多。有许多较暗的候选者，但我们预计前景闯入者和虚假检测的实质性污染。我们最好的估计有利于一个z = 6的星系人口与较暗的光度，较高的空间密度，和类似的同向紫外线发射率在z = 3，但这主要取决于在流量比目前的数据可靠探测微弱的计数。
We report early results on galaxies at z ~ 6 selected from Hubble Space Telescope imaging for the Great Observatories Origins Deep Survey. Spectroscopy of one object with the Advanced Camera for Surveys grism and from the Keck and Very Large Telescope observatories shows a strong continuum break and asymmetric line emission, identified as Lyα at z = 5.83. We find only five spatially extended candidates with signal-to-noise ratios greater than 10, two of which have spectroscopic confirmation. This is much fewer than would be expected if galaxies at z = 6 had the same luminosity function as those at z = 3. There are many fainter candidates, but we expect substantial contamination from foreground interlopers and spurious detections. Our best estimates favor a z = 6 galaxy population with fainter luminosities, higher space density, and similar comoving ultraviolet emissivity to that at z = 3, but this depends critically on counts at fluxes fainter than those reliably probed by the current data.