A Photometrically Detected Forming Cluster of Galaxies at Redshift 1.6 in the GOODS Field

Details A Photometrically Detected Forming Cluster of Galaxies at Redshift 1.6 in the GOODS Field A Photometrically Detected Forming Cluster of Galaxies at Redshift 1.6 in the GOODS Field

2007-07-12

arxiv.org/abs/0707.1783v1

Astronomy and Astrophysics

Astrophysics

6 pages, 5 figures (1 in color), uses emulateapj.cls Latex class file, accepted for publication in ApJ

Scientific paper

10.1086/521595

We report the discovery of a localized overdensity at z~1.6 in the GOODS-South Field, presumably a poor cluster in the process of formation. The three-dimensional galaxy density has been estimated on the basis of well calibrated photometric redshifts from the multiband photometric GOODS-MUSIC catalog using the (2+1)D technique. The density peak is embedded in the larger scale overdensity of galaxies known to exist at z=1.61 in the area. The properties of the member galaxies are compared to those of the surrounding field and we found that the two populations are significantly different supporting the reality of the structure. The reddest galaxies, once evolved according to their best fit models, have colors consistent with the red sequence of lower redshift clusters. The estimated M_200 total mass of the cluster is in the range 1.3 x 10^14 - 5.7x 10^14 Msun, depending on the assumed bias factor b. An upper limit for the 2-10 keV X-ray luminosity, based on the 1Ms Chandra observations, is L_X=0.5 x 10^43 erg s^-1, suggesting that the cluster has not yet reached the virial equilibrium.

Affiliated with

Also associated with

No associations

Rating

A Photometrically Detected Forming Cluster of Galaxies at Redshift 1.6 in the GOODS Field does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A Photometrically Detected Forming Cluster of Galaxies at Redshift 1.6 in the GOODS Field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Photometrically Detected Forming Cluster of Galaxies at Redshift 1.6 in the GOODS Field will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-161158