SIMBAD references

2008MNRAS.384.1502S - Mon. Not. R. Astron. Soc., 384, 1502-1510 (2008/March-2)

Near-infrared evolution of brightest cluster galaxies in the most X-ray luminous clusters since z = 1.


Abstract (from CDS):

We investigate the near-infrared evolution of brightest cluster galaxies (BCGs) from a sample of rich galaxy clusters since z ∼ 1. By employing an X-ray selection of LX> 1044erg/s, we limit environmental effects by selecting BCGs in comparably high-density regions. We find a positive relationship between X-ray and near-infrared luminosity for BCGs in clusters with LX> 5x1044erg/s. Applying a correction for this relation, we reduce the scatter in the BCG absolute magnitude by a factor of 30 per cent. The near-infrared J - K colour evolution demonstrates that the stellar population in BCGs has been in place since at least z = 2, and that we expect a shorter period of star formation than that predicted by current hierarchical merger models. We also confirm that there is a relationship between `blue' J - K colour and the presence of BCG emission lines associated with star formation in cooling flows.

Abstract Copyright: 2008 The Authors. Journal compilation © 2008 RAS

Journal keyword(s): galaxies: clusters: general - galaxies: elliptical and lenticular, cD - galaxies: evolution - cosmology: observations - infrared: galaxies

VizieR on-line data: <Available at CDS (J/MNRAS/384/1502): tablea1.dat tablea2.dat tablea3.dat>

Nomenclature: Tables A1-A3: [SES2008] N=40+46+18.

Simbad objects: 197

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