| Download | - View final version: Evolution of red-sequence cluster galaxies from redshift 0.8 to 0.4: ages, metallicities, and morphologies (PDF, 2.7 MiB)
|
|---|
| DOI | Resolve DOI: https://doi.org/10.1051/0004-6361/200811355 |
|---|
| Author | Search for: Sánchez-Blázquez, P.; Search for: Jablonka, P.; Search for: Noll, S.; Search for: Poggianti, B. M.; Search for: Moustakas, J.; Search for: Milvang-Jensen, B.; Search for: Halliday, C.; Search for: Aragón-Salamanca, A.; Search for: Saglia, R. P.; Search for: Desai, V.; Search for: De Lucia, G.; Search for: Clowe, D. I.; Search for: Pelló, R.; Search for: Rudnick, G.; Search for: Simard, L.1; Search for: White, S. D. M.; Search for: Zaritsky, D. |
|---|
| Affiliation | - National Research Council of Canada. NRC Herzberg Institute of Astrophysics
|
|---|
| Format | Text, Article |
|---|
| Subject | galaxies: evolution; galaxies elliptical and lenticular, cD; galaxies: clusters: general; galaxies: stellar content; galaxies: high-redshift; galaxies: abundances |
|---|
| Abstract | We present a comprehensive analysis of the stellar population properties and morphologies of red-sequence galaxies in 24 clusters and groups from to . The dataset, consisting of 215 spectra drawn from the ESO Distant Cluster Survey, constitutes the largest spectroscopic sample at these redshifts for which such an analysis has been conducted. Analysis reveals that the evolution of the stellar population properties of red-sequence galaxies depend on their mass: while the properties of the most massive are well described by passive evolution and high-redshift formation, those of the less massive galaxies are consistent with a more extended star-formation history. We show that these scenarios reproduce the index-σ relations and the galaxy colours. The two main results of this work are: (1) the evolution of the line-strength indices for the red-sequence galaxies can be reproduced if 40% of the galaxies with km s-1 entered the red-sequence between to , in agreement with the fraction derived in studies of the luminosity functions; and (2) the percentage of red-sequence galaxies exhibiting early-type morphologies (E and S0) decreases by 20% from to . This can be understood if the red-sequence becomes more populated at later times with disc galaxies whose star formation has been quenched. We conclude that the processes quenching star formation do not necessarily produce a simultaneous morphological transformation of the galaxies entering the red-sequence. |
|---|
| Publication date | 2009-05 |
|---|
| Publisher | EDP Sciences |
|---|
| In | |
|---|
| Language | English |
|---|
| Peer reviewed | Yes |
|---|
| NPARC number | 23004826 |
|---|
| Export citation | Export as RIS |
|---|
| Report a correction | Report a correction (opens in a new tab) |
|---|
| Record identifier | ffe19481-15a8-4374-b904-737dbaecf20d |
|---|
| Record created | 2019-01-02 |
|---|
| Record modified | 2020-05-30 |
|---|
