SIMBAD references

2007MNRAS.374..809D - Mon. Not. R. Astron. Soc., 374, 809-822 (2007/January-3)

The build-up of the colour-magnitude relation in galaxy clusters since z ∼ 0.8.

DE LUCIA G., POGGIANTI B.M., ARAGON-SALAMANCA A., WHITE S.D.M., ZARITSKY D., CLOWE D., HALLIDAY C., JABLONKA P., VON DER LINDEN A., MILVANG-JENSEN B., PELLO R., RUDNICK G., SAGLIA R.P. and SIMARD L.

Abstract (from CDS):

Using galaxy clusters from the ESO Distant Cluster Survey, we study how the distribution of galaxies along the colour-magnitude relation has evolved since z ∼ 0.8. While red-sequence galaxies in all these clusters are well described by an old, passively evolving population, we confirm our previous finding of a significant evolution in their luminosity distribution as a function of redshift. When compared to galaxy clusters in the local Universe, the high-redshift EDisCS clusters exhibit a significant deficit of faint red galaxies. Combining clusters in three different redshift bins, and defining as `faint' all galaxies in the range 0.4 ≳ L/L* ≳ 0.1, we find a clear decrease in the luminous-to-faint ratio of red galaxies from z ∼ 0.8 to ∼0.4. The amount of such a decrease appears to be in qualitative agreement with predictions of a model where the blue bright galaxies that populate the colour-magnitude diagram of high-redshift clusters, have their star formation suppressed by the hostile cluster environment. Although model results need to be interpreted with caution, our findings clearly indicate that the red-sequence population of high-redshift clusters does not contain all progenitors of nearby red-sequence cluster galaxies. A significant fraction of these must have moved on to the red sequence below z ∼ 0.8.

Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS

Journal keyword(s): galaxies: clusters: general - galaxies: evolution - galaxies: fundamental parameters - galaxies: luminosity function, mass function

Status at CDS:  

Simbad objects: 22

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