Star-forming fractions and galaxy evolution with redshift in rich X-ray-selected galaxy clusters

Julie B. Nantais, Alessandro Rettura, Chris Lidman, Ricardo Demarco, Raphael Gobat, Piero Rosati, M. James Jee

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We have compared stacked spectra of galaxies, grouped by environment and stellar mass, among 58 members of the redshift z = 1.24 galaxy cluster RDCS J1252.9-2927 (J1252.9) and 134 galaxies in the z = 0.84 cluster RX J0152.7-1357 (J0152.7). These two clusters are excellent laboratories to study how galaxies evolve from star-forming to passive at z ∼ 1. We measured spectral indices and star-forming fractions for our density- and mass-based stacked spectra. The star-forming fraction among low-mass galaxies (<7 × 10 10M) is higher in J1252.9 than in J0152.7, at about 4σ significance. Thus star formation is being quenched between z = 1.24 and z = 0.84 for a substantial fraction of low-mass galaxies. Star-forming fractions were also found to be higher in J1252.9 in all environments, including the core. Passive galaxies in J1252.9 have systematically lower D n4000 values than in J0152.7 in all density and mass groups, consistent with passive evolution at modestly super-solar metallicities.

Original languageEnglish
Article numberA112
JournalAstronomy and Astrophysics
Volume556
DOIs
Publication statusPublished - 2013 Aug 19

Fingerprint

galaxies
stars
x rays
stellar mass
metallicity
star formation

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Nantais, Julie B. ; Rettura, Alessandro ; Lidman, Chris ; Demarco, Ricardo ; Gobat, Raphael ; Rosati, Piero ; James Jee, M. / Star-forming fractions and galaxy evolution with redshift in rich X-ray-selected galaxy clusters. In: Astronomy and Astrophysics. 2013 ; Vol. 556.
@article{7bfb12ffb3064a78b690350644fb338c,
title = "Star-forming fractions and galaxy evolution with redshift in rich X-ray-selected galaxy clusters",
abstract = "We have compared stacked spectra of galaxies, grouped by environment and stellar mass, among 58 members of the redshift z = 1.24 galaxy cluster RDCS J1252.9-2927 (J1252.9) and 134 galaxies in the z = 0.84 cluster RX J0152.7-1357 (J0152.7). These two clusters are excellent laboratories to study how galaxies evolve from star-forming to passive at z ∼ 1. We measured spectral indices and star-forming fractions for our density- and mass-based stacked spectra. The star-forming fraction among low-mass galaxies (<7 × 10 10M⊙) is higher in J1252.9 than in J0152.7, at about 4σ significance. Thus star formation is being quenched between z = 1.24 and z = 0.84 for a substantial fraction of low-mass galaxies. Star-forming fractions were also found to be higher in J1252.9 in all environments, including the core. Passive galaxies in J1252.9 have systematically lower D n4000 values than in J0152.7 in all density and mass groups, consistent with passive evolution at modestly super-solar metallicities.",
author = "Nantais, {Julie B.} and Alessandro Rettura and Chris Lidman and Ricardo Demarco and Raphael Gobat and Piero Rosati and {James Jee}, M.",
year = "2013",
month = "8",
day = "19",
doi = "10.1051/0004-6361/201321877",
language = "English",
volume = "556",
journal = "Astronomy and Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",

}

Star-forming fractions and galaxy evolution with redshift in rich X-ray-selected galaxy clusters. / Nantais, Julie B.; Rettura, Alessandro; Lidman, Chris; Demarco, Ricardo; Gobat, Raphael; Rosati, Piero; James Jee, M.

In: Astronomy and Astrophysics, Vol. 556, A112, 19.08.2013.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Star-forming fractions and galaxy evolution with redshift in rich X-ray-selected galaxy clusters

AU - Nantais, Julie B.

AU - Rettura, Alessandro

AU - Lidman, Chris

AU - Demarco, Ricardo

AU - Gobat, Raphael

AU - Rosati, Piero

AU - James Jee, M.

PY - 2013/8/19

Y1 - 2013/8/19

N2 - We have compared stacked spectra of galaxies, grouped by environment and stellar mass, among 58 members of the redshift z = 1.24 galaxy cluster RDCS J1252.9-2927 (J1252.9) and 134 galaxies in the z = 0.84 cluster RX J0152.7-1357 (J0152.7). These two clusters are excellent laboratories to study how galaxies evolve from star-forming to passive at z ∼ 1. We measured spectral indices and star-forming fractions for our density- and mass-based stacked spectra. The star-forming fraction among low-mass galaxies (<7 × 10 10M⊙) is higher in J1252.9 than in J0152.7, at about 4σ significance. Thus star formation is being quenched between z = 1.24 and z = 0.84 for a substantial fraction of low-mass galaxies. Star-forming fractions were also found to be higher in J1252.9 in all environments, including the core. Passive galaxies in J1252.9 have systematically lower D n4000 values than in J0152.7 in all density and mass groups, consistent with passive evolution at modestly super-solar metallicities.

AB - We have compared stacked spectra of galaxies, grouped by environment and stellar mass, among 58 members of the redshift z = 1.24 galaxy cluster RDCS J1252.9-2927 (J1252.9) and 134 galaxies in the z = 0.84 cluster RX J0152.7-1357 (J0152.7). These two clusters are excellent laboratories to study how galaxies evolve from star-forming to passive at z ∼ 1. We measured spectral indices and star-forming fractions for our density- and mass-based stacked spectra. The star-forming fraction among low-mass galaxies (<7 × 10 10M⊙) is higher in J1252.9 than in J0152.7, at about 4σ significance. Thus star formation is being quenched between z = 1.24 and z = 0.84 for a substantial fraction of low-mass galaxies. Star-forming fractions were also found to be higher in J1252.9 in all environments, including the core. Passive galaxies in J1252.9 have systematically lower D n4000 values than in J0152.7 in all density and mass groups, consistent with passive evolution at modestly super-solar metallicities.

UR - http://www.scopus.com/inward/record.url?scp=84881435248&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84881435248&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201321877

DO - 10.1051/0004-6361/201321877

M3 - Article

AN - SCOPUS:84881435248

VL - 556

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

M1 - A112

ER -