The Clustering of Massive Galaxies at z ~ 1

Details The Clustering of Massive Galaxies at z ~ 1 The Clustering of Massive Galaxies at z ~ 1

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aipc..666..257o&link_type=abstract

THE EMERGENCE OF COSMIC STRUCTURE: Thirteenth Astrophysics Conference. AIP Conference Proceedings, Volume 666, pp. 257-259 (200

Computer Science

Databases

Galaxy Clusters, Radio Galaxies, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Astronomical Catalogs, Atlases, Sky Surveys, Databases, Retrieval Systems, Archives, Etc.

Scientific paper

We use the angular two-point correlation function to estimate the spatial correlation length of radio sources taken from the large-area 1.4 GHz NVSS radio survey. At the median survey redshift of z ~ 1, r0 is found to be increasing with flux density. This is consistent with a scenario in which powerful (i.e. FRII) radio galaxies probe significantly more massive spatial structures than less powerful radio galaxies. The large spatial correlation length that we derive for FRIIs is remarkably close to that of extremely red objects (EROs). This implies that powerful radio galaxies and EROs trace equally massive structures at z ~ 1. Moreover, because powerful radio galaxies and EROs are both associated with luminous early-type galaxies we propose that they could be the same objects seen at different evolutionary stages. The correlation length of massive, luminous galaxies at z ~ 1 is comparable to that of bright ellipticals locally, suggesting that r0 (comoving) of these massive galaxies has changed little from z ~ 1 to z ~ 0. This is in excellent agreement with current ΛCDM hierarchical model predictions.

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