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

Stott, J. P. and Edge, A. C. and Smith, G. P. and Swinbank, A. M. and Ebeling, H. (2008) Near-infrared evolution of brightest cluster galaxies in the most X-ray luminous clusters since z = 1. Monthly Notices of the Royal Astronomical Society, 384 (4). pp. 1502-1510. ISSN 0035-8711

Full text not available from this repository.

Abstract

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 L X > 10 44 erg s -1, 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 L X > 5 × 10 44 erg s -1. 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.

Item Type:
Journal Article
Journal or Publication Title:
Monthly Notices of the Royal Astronomical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3103
Subjects:
ID Code:
84050
Deposited By:
Deposited On:
17 Jan 2017 15:06
Refereed?:
Yes
Published?:
Published
Last Modified:
20 Nov 2020 04:24