Overdensities of galaxies at z ~ 3.7 in CDF-S Export

@article{citeulike:3795782, abstract = {We report the discovery of possible overdensities of galaxies at z\~{}3.7 in the Chandra Deep Field South (CDF-S). These overdensities are identified from the photometric redshift selected sample, and the BVz-selected sample. One over-density is identified in the proximity of 2 AGNs and LBGs at z=3.66 and z=3.70 at 7-sigma significance level. The other over-density is less significant. It is identified around six z\_{spec}\~{}3.6 galaxies at 3-sigma significance level. The line of sight velocity dispersions of these overdensities are found to be sigma\_{v}\~{} 500-800 km/sec, comparable to the velocity dispersions of clusters of galaxies today. Through the spectral energy distribution (SED) fitting, we find \~{}15 massive galaxies with M \> 10^{11}M\_sun around the z\~{}3.7 overdensity. The mass of the z\~{}3.7 overdensity is found to be a few times 10^{14}M\_sun. Our result suggests that high redshift over-dense regions can be found in a supposedly blank field, and that the emergence of massive structures can be traced back to redshift as high as z\~{}3.7.}, archivePrefix = {arXiv}, author = {Kang, Eugene and Im, Myungshin}, citeulike-article-id = {3795782}, citeulike-linkout-0 = {http://arxiv.org/abs/0812.2814}, citeulike-linkout-1 = {http://arxiv.org/pdf/0812.2814}, day = {15}, eprint = {0812.2814}, keywords = {cdfs}, month = {Dec}, posted-at = {2008-12-31 17:10:24}, priority = {2}, title = {Overdensities of galaxies at z \~{} 3.7 in CDF-S}, url = {http://arxiv.org/abs/0812.2814}, year = {2008} }

TY - JOUR ID - citeulike:3795782 L3 - citeulike-article-id:3795782 N2 - We report the discovery of possible overdensities of galaxies at z~3.7 in the Chandra Deep Field South (CDF-S). These overdensities are identified from the photometric redshift selected sample, and the BVz-selected sample. One over-density is identified in the proximity of 2 AGNs and LBGs at z=3.66 and z=3.70 at 7-sigma significance level. The other over-density is less significant. It is identified around six z_{spec}~3.6 galaxies at 3-sigma significance level. The line of sight velocity dispersions of these overdensities are found to be sigma_{v}~ 500-800 km/sec, comparable to the velocity dispersions of clusters of galaxies today. Through the spectral energy distribution (SED) fitting, we find ~15 massive galaxies with M > 10^{11}M_sun around the z~3.7 overdensity. The mass of the z~3.7 overdensity is found to be a few times 10^{14}M_sun. Our result suggests that high redshift over-dense regions can be found in a supposedly blank field, and that the emergence of massive structures can be traced back to redshift as high as z~3.7. TI - Overdensities of galaxies at z ~ 3.7 in CDF-S KW - cdfs AU - Kang, Eugene AU - Im, Myungshin PY - 2008/Dec/15/ UR - http://arxiv.org/abs/0812.2814 ER -