Evolution of the colour-magnitude relation of early-type galaxies in distant clusters
| dc.creator | Kodama, T. | |
| dc.creator | Arimoto, N. | |
| dc.creator | Barger, A. J. | |
| dc.creator | Aragon-Salamanca, A. | |
| dc.date | 1998-02-18 | |
| dc.date.accessioned | 2026-07-07T06:27:24Z | |
| dc.date.available | 2026-07-07T06:27:24Z | |
| dc.description | We present a thorough quantitative analysis of the evolution of the colour-magnitude relation for early-type galaxies in 17 distant clusters with redshifts 0.31 < z < 1.27 using the Kodama & Arimoto (1997) evolutionary model for elliptical galaxies. The model is calibrated to reproduce the colour- magnitude relation for Coma ellipticals at z ~ 0 and gives the evolution of the slope and zero-point as a function of redshift. We find no significant differences between the colour-magnitude relations of the clusters in our sample. The slopes can be reproduced by a single model sequence in which all elliptical galaxies are assumed to be equally old (the maximum age difference allowed for the brightest 3 magnitudes is only 1 Gyr) and to have mean stellar metallicities which vary as a function of galaxy luminosity. The zero-points of the colour-magnitude relations constrain the epoch of major star formation in early-type galaxies to z_f>2-4. This study provides two important constraints for any model of the formation of rich clusters: the uniformity of the ages of the stellar populations in the early-type galaxies and the universality of the metallicity sequence of these galaxies as a function of galaxy mass. | |
| dc.description | 13 pages, 5 postscript figures, Latex (A&A format), uses epsf.sty and aa.cls, Accepted for publication in A&A Main Jounal | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9802245 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9802245 | |
| dc.identifier | Astron.Astrophys. 334 (1998) 99-109 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/97405 | |
| dc.subject | Astrophysics | |
| dc.title | Evolution of the colour-magnitude relation of early-type galaxies in distant clusters | |
| dc.type | text |