Evolution of red-sequence cluster galaxies from redshift 0.8 to 0.4: ages, metallicities, and morphologies

被引：79

作者：

Sanchez-Blazquez, P. ^{[1
,2
]}

Jablonka, P. ^{[2
,3
,4
]}

Noll, S. ^{[5
,6
]}

Poggianti, B. M. ^{[7
]}

Moustakas, J. ^{[8
]}

Milvang-Jensen, B. ^{[9
,10
]}

Halliday, C. ^{[11
]}

Aragon-Salamanca, A. ^{[12
]}

Saglia, R. P. ^{[5
]}

Desai, V. ^{[13
]}

De Lucia, G. ^{[14
]}

Clowe, D. I. ^{[15
]}

Pello, R. ^{[16
]}

Rudnick, G. ^{[17
]}

Simard, L. ^{[18
]}

White, S. D. M. ^{[14
]}

Zaritsky, D. ^{[19
]}

机构：

[1] Univ Cent Lancashire, Ctr Astrophys, Preston PR1 2HE, Lancs, England

[2] Ecole Polytech Fed Lausanne, Astrophys Lab, Observ Sauverny Versoix 1290, CH-1015 Lausanne, Switzerland

[3] Univ Geneva, Observ Sauverny Versoix 1290, CH-1211 Geneva 4, Switzerland

[4] Observ Paris, Sect Meudon, GEPI, CNRS UMR8111, F-92195 Meudon, France

[5] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany

[6] Observ Astron Marseille Provence, F-13388 Marseille 13, France

[7] Osserv Astron Padova, I-35122 Padua, Italy

[8] NYU, Ctr Cosmol & Particle Phys, New York, NY 10003 USA

[9] Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen, Denmark

[10] Copenhagen Univ Lib, Royal Lib, Res Dept, DK-1016 Copenhagen K, Denmark

[11] Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy

[12] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England

[13] CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA

[14] Max Planck Inst Astrophys, D-85748 Garching, Germany

[15] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA

[16] Univ Toulouse, CNRS, Lab Astrophys Toulouse Tarbes, F-31400 Toulouse, France

[17] Natl Opt Astron Observ, Tucson, AZ 85719 USA

[18] Natl Res Council Canada, Herzberg Inst Astrophys, Victoria, BC V9E 2E7, Canada

[19] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2009年 / 499卷 / 01期

关键词：

galaxies: evolution; galaxies elliptical and lenticular; cD; galaxies: clusters: general; galaxies: stellar content; galaxies: high-redshift; galaxies: abundances; COLOR-MAGNITUDE RELATION; STELLAR POPULATION HISTORIES; STAR-FORMATION HISTORIES; LINE-STRENGTH GRADIENTS; DIGITAL SKY SURVEY; ELLIPTIC GALAXIES; DISTANT CLUSTERS; VELOCITY DISPERSIONS; FUNDAMENTAL-PLANE; FIELD GALAXIES;

D O I：

10.1051/0004-6361/200811355

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a comprehensive analysis of the stellar population properties and morphologies of red-sequence galaxies in 24 clusters and groups from z similar to 0.75 to z similar to 0.45. 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-sigma 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 sigma < 175 km s(-1) entered the red-sequence between z = 0.75 to z = 0.45, 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 z = 0.75 to z = 0.45. 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.

引用

页码：47 / 68

页数：22

共 118 条

[1] The history of mass assembly of faint red galaxies in 28 galaxy clusters since z=1.3 [J].