A deeper view of extremely red galaxies: the redshift distribution in the GOODS/CDFS ISAAC field
A deeper view of extremely red galaxies: the redshift distribution in the GOODS/CDFS ISAAC field
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更深入地观察极红星系：GOODS/CDFS ISAAC 场中的红移分布
DOI：
10.1111/j.1365-2966.2004.08044.x
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发表时间：
2004
影响因子：
4.8
通讯作者：
Nathan D. Roche
中科院分区：
文献类型：
--
作者：
K. Caputi;J. Dunlop;R. McLure;Nathan D. Roche
我们分析了五个纪元的大天文台起源深度巡天 (GOODS) HST-ACS B、V、I-775 和 z 数据集（v. 1.0 版本），结合 J、H 和 K-s 波段现有的 VLT-ISAAC 成像，得出 Roche、Dunlop 和 Almaini 选择的 K-s 3.92 的 198 个极红星系 (ERG) 样本的估计红移(2003) 来自 GOODS/Chandra Deep Field South 的 50.4 arcmin(2)。我们发现，在这个深度，ERG群体在红移zphot > 2时跨越了红移范围0.5 L群体。我们确定了局部质量祖细胞的共动密度的下限c = (6.1 +/- 1.9) x 10(-5) Mpc(-3)和rho(c) = (2.1 +/- 1.1) x 10(-5) Mpc(-3)已分别在红移 zphot = 2.5 和 zphot = 3.5 处聚集的星系。我们已经研究了高红移莱曼断裂星系的存在，其质量足以包含在这个 ERG 样本中。在 12 个潜在极高红移候选源的初始列表中，我们确定了两个 ERG 在 z(phot) > 4 处的概率很高。我们讨论了多色相对于单色选择技术在获得极高红移候选源的可靠列表方面的优势，并对先前在最近的研究中声称为潜在 z > 5 丢失的源提出了修订后的较低红移估计。
We have analysed five-epoch Great Observatories Origins Deep Survey (GOODS) HST-ACS B, V, I-775 and z data sets (v. 1.0 release), in conjunction with existing VLT-ISAAC imaging in the J, H and K-s bands, to derive estimated redshifts for the sample of 198 extremely red galaxies (ERGs) with K-s 3.92 selected by Roche, Dunlop & Almaini (2003) from 50.4 arcmin(2) of the GOODS/Chandra Deep Field South. We find that, at this depth, the ERG population spans the redshift range 0.5 L population at redshifts zphot > 2. We determine lower limits of c = (6.1 +/- 1.9) x 10(-5) Mpc(-3) and rho(c) = (2.1 +/- 1.1) x 10(-5) Mpc(-3) on the comoving densities of progenitors of local massive galaxies already assembled at redshifts zphot = 2.5 and zphot = 3.5, respectively. We have investigated the existence of high-redshift Lyman-break galaxies massive enough to be included in this ERG sample. Out of an initial list of 12 potential very high redshift candidates, we have identified two ERGs which have a high probability of lying at z(phot) > 4. We discuss the advantages of multicolour to single-colour selection techniques in obtaining reliable lists of very high redshift candidate sources, and present revised lower redshift estimates for sources previously claimed as potential z > 5 dropouts in recent studies.
影响因子：
4.9
作者：
Charlot, S;Fall, SM
通讯作者：
Fall, SM