Clustering Evolution Between z=1 And Today

Details Clustering Evolution Between z=1 And Today Clustering Evolution Between z=1 And Today

2002-09-16

arxiv.org/abs/astro-ph/0209294v1

Astrophys.Space Sci. 284 (2003) 377-380

Astronomy and Astrophysics

Astrophysics

Proceedings of "The Evolution of Galaxies III. From Simple Approaches to Self-Consistent Models", a conference held in Kiel, G

Scientific paper

10.1023/A:1024050715205

We present results of an investigation of clustering evolution of field galaxies between a redshift of z\~1 and the present epoch. The current analysis relies on a sample of ~14000 galaxies in two fields of the COMBO-17 survey. The redshift distribution extends to z~1.1. The amplitude of the three-dimensional correlation function can be estimated by means of the projected correlation function w(r_p). The validity of the deprojection was tested on the Las Campanas Redshift Survey (LCRS). In a flat cosmology with non-zero cosmological constant for bright galaxies (M_B<-18) the clustering growth is proportional to (1+z)^{-2}. However, the measured clustering evolution clearly depends on Hubble type. While locally the clustering strength of early type galaxies is equal to that of the bright galaxies, at high redshifts they are much stronger clustered, and thus the clustering has to evolve much more slowly.

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