The gemini cluster astrophysics spectroscopic survey (GCLASS): The role of environment and self-regulation in galaxy evolution at z ∼ 1

Adam Muzzin, Gillian Wilson, H. K C Yee, David Gilbank, Henk Hoekstra, Ricardo Demarco, Michael Balogh, Pieter Van Dokkum, Marijn Franx, Erica Ellingson, Amalia Hicks, Julie Nantais, Allison Noble, Mark Lacy, Chris Lidman, Alessandro Rettura, Jason Surace, Tracy Webb

Resultado de la investigación: Article

173 Citas (Scopus)

Resumen

We evaluate the effects of environment and stellar mass on galaxy properties at 0.85 <z < 1.20 using a 3.6 μm-selected spectroscopic sample of 797 cluster and field galaxies drawn from the Gemini Cluster Astrophysics Spectroscopic Survey. We confirm that for galaxies with logM */M > 9.3 the well-known correlations between environment and properties such as star-forming fraction (f SF), star formation rate (SFR), specific SFR (SSFR), D n(4000), and color are already in place at z ∼ 1. We separate the effects of environment and stellar mass on galaxies by comparing the properties of star-forming and quiescent galaxies at fixed environment and fixed stellar mass. The SSFR of star-forming galaxies at fixed environment is correlated with stellar mass; however, at fixed stellar mass it is independent of environment. The same trend exists for the D n(4000) measures of both the star-forming and quiescent galaxies and shows that their properties are determined primarily by their stellar mass, not by their environment. Instead, it appears that environment's primary role is to control the fraction of star-forming galaxies. Using the spectra we identify candidate poststarburst galaxies and find that those with 9.3 < logM */M < 10.7 are 3.1 ± 1.1 times more common in high-density regions compared to low-density regions. The clear association of poststarbursts with high-density regions as well as the lack of a correlation between the SSFRs and D n(4000)s of star-forming galaxies with their environment strongly suggests that at z 1 the environmental-quenching timescale must be rapid. Lastly, we construct a simple quenching model which demonstrates that the lack of a correlation between the D n(4000) of quiescent galaxies and their environment results naturally if self quenching dominates over environmental quenching at z > 1, or if the evolution of the self-quenching rate mirrors the evolution of the environmental-quenching rate at z > 1, regardless of which dominates.

Idioma originalEnglish
Número de artículo188
PublicaciónAstrophysical Journal
Volumen746
N.º2
DOI
EstadoPublished - 20 feb 2012

Huella dactilar

astrophysics
stellar mass
galaxies
stars
quenching
regulation
star formation rate
mirrors
trends
color

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Space and Planetary Science
  • Astronomy and Astrophysics

Citar esto

Muzzin, Adam ; Wilson, Gillian ; Yee, H. K C ; Gilbank, David ; Hoekstra, Henk ; Demarco, Ricardo ; Balogh, Michael ; Van Dokkum, Pieter ; Franx, Marijn ; Ellingson, Erica ; Hicks, Amalia ; Nantais, Julie ; Noble, Allison ; Lacy, Mark ; Lidman, Chris ; Rettura, Alessandro ; Surace, Jason ; Webb, Tracy. / The gemini cluster astrophysics spectroscopic survey (GCLASS) : The role of environment and self-regulation in galaxy evolution at z ∼ 1. En: Astrophysical Journal. 2012 ; Vol. 746, N.º 2.
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abstract = "We evaluate the effects of environment and stellar mass on galaxy properties at 0.85 */M ⊙ > 9.3 the well-known correlations between environment and properties such as star-forming fraction (f SF), star formation rate (SFR), specific SFR (SSFR), D n(4000), and color are already in place at z ∼ 1. We separate the effects of environment and stellar mass on galaxies by comparing the properties of star-forming and quiescent galaxies at fixed environment and fixed stellar mass. The SSFR of star-forming galaxies at fixed environment is correlated with stellar mass; however, at fixed stellar mass it is independent of environment. The same trend exists for the D n(4000) measures of both the star-forming and quiescent galaxies and shows that their properties are determined primarily by their stellar mass, not by their environment. Instead, it appears that environment's primary role is to control the fraction of star-forming galaxies. Using the spectra we identify candidate poststarburst galaxies and find that those with 9.3 < logM */M ⊙ < 10.7 are 3.1 ± 1.1 times more common in high-density regions compared to low-density regions. The clear association of poststarbursts with high-density regions as well as the lack of a correlation between the SSFRs and D n(4000)s of star-forming galaxies with their environment strongly suggests that at z 1 the environmental-quenching timescale must be rapid. Lastly, we construct a simple quenching model which demonstrates that the lack of a correlation between the D n(4000) of quiescent galaxies and their environment results naturally if self quenching dominates over environmental quenching at z > 1, or if the evolution of the self-quenching rate mirrors the evolution of the environmental-quenching rate at z > 1, regardless of which dominates.",
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Muzzin, A, Wilson, G, Yee, HKC, Gilbank, D, Hoekstra, H, Demarco, R, Balogh, M, Van Dokkum, P, Franx, M, Ellingson, E, Hicks, A, Nantais, J, Noble, A, Lacy, M, Lidman, C, Rettura, A, Surace, J & Webb, T 2012, 'The gemini cluster astrophysics spectroscopic survey (GCLASS): The role of environment and self-regulation in galaxy evolution at z ∼ 1', Astrophysical Journal, vol. 746, n.º 2, 188. https://doi.org/10.1088/0004-637X/746/2/188

The gemini cluster astrophysics spectroscopic survey (GCLASS) : The role of environment and self-regulation in galaxy evolution at z ∼ 1. / Muzzin, Adam; Wilson, Gillian; Yee, H. K C; Gilbank, David; Hoekstra, Henk; Demarco, Ricardo; Balogh, Michael; Van Dokkum, Pieter; Franx, Marijn; Ellingson, Erica; Hicks, Amalia; Nantais, Julie; Noble, Allison; Lacy, Mark; Lidman, Chris; Rettura, Alessandro; Surace, Jason; Webb, Tracy.

En: Astrophysical Journal, Vol. 746, N.º 2, 188, 20.02.2012.

Resultado de la investigación: Article

TY - JOUR

T1 - The gemini cluster astrophysics spectroscopic survey (GCLASS)

T2 - The role of environment and self-regulation in galaxy evolution at z ∼ 1

AU - Muzzin, Adam

AU - Wilson, Gillian

AU - Yee, H. K C

AU - Gilbank, David

AU - Hoekstra, Henk

AU - Demarco, Ricardo

AU - Balogh, Michael

AU - Van Dokkum, Pieter

AU - Franx, Marijn

AU - Ellingson, Erica

AU - Hicks, Amalia

AU - Nantais, Julie

AU - Noble, Allison

AU - Lacy, Mark

AU - Lidman, Chris

AU - Rettura, Alessandro

AU - Surace, Jason

AU - Webb, Tracy

PY - 2012/2/20

Y1 - 2012/2/20

N2 - We evaluate the effects of environment and stellar mass on galaxy properties at 0.85 */M ⊙ > 9.3 the well-known correlations between environment and properties such as star-forming fraction (f SF), star formation rate (SFR), specific SFR (SSFR), D n(4000), and color are already in place at z ∼ 1. We separate the effects of environment and stellar mass on galaxies by comparing the properties of star-forming and quiescent galaxies at fixed environment and fixed stellar mass. The SSFR of star-forming galaxies at fixed environment is correlated with stellar mass; however, at fixed stellar mass it is independent of environment. The same trend exists for the D n(4000) measures of both the star-forming and quiescent galaxies and shows that their properties are determined primarily by their stellar mass, not by their environment. Instead, it appears that environment's primary role is to control the fraction of star-forming galaxies. Using the spectra we identify candidate poststarburst galaxies and find that those with 9.3 < logM */M ⊙ < 10.7 are 3.1 ± 1.1 times more common in high-density regions compared to low-density regions. The clear association of poststarbursts with high-density regions as well as the lack of a correlation between the SSFRs and D n(4000)s of star-forming galaxies with their environment strongly suggests that at z 1 the environmental-quenching timescale must be rapid. Lastly, we construct a simple quenching model which demonstrates that the lack of a correlation between the D n(4000) of quiescent galaxies and their environment results naturally if self quenching dominates over environmental quenching at z > 1, or if the evolution of the self-quenching rate mirrors the evolution of the environmental-quenching rate at z > 1, regardless of which dominates.

AB - We evaluate the effects of environment and stellar mass on galaxy properties at 0.85 */M ⊙ > 9.3 the well-known correlations between environment and properties such as star-forming fraction (f SF), star formation rate (SFR), specific SFR (SSFR), D n(4000), and color are already in place at z ∼ 1. We separate the effects of environment and stellar mass on galaxies by comparing the properties of star-forming and quiescent galaxies at fixed environment and fixed stellar mass. The SSFR of star-forming galaxies at fixed environment is correlated with stellar mass; however, at fixed stellar mass it is independent of environment. The same trend exists for the D n(4000) measures of both the star-forming and quiescent galaxies and shows that their properties are determined primarily by their stellar mass, not by their environment. Instead, it appears that environment's primary role is to control the fraction of star-forming galaxies. Using the spectra we identify candidate poststarburst galaxies and find that those with 9.3 < logM */M ⊙ < 10.7 are 3.1 ± 1.1 times more common in high-density regions compared to low-density regions. The clear association of poststarbursts with high-density regions as well as the lack of a correlation between the SSFRs and D n(4000)s of star-forming galaxies with their environment strongly suggests that at z 1 the environmental-quenching timescale must be rapid. Lastly, we construct a simple quenching model which demonstrates that the lack of a correlation between the D n(4000) of quiescent galaxies and their environment results naturally if self quenching dominates over environmental quenching at z > 1, or if the evolution of the self-quenching rate mirrors the evolution of the environmental-quenching rate at z > 1, regardless of which dominates.

KW - galaxies: clusters: general

KW - galaxies: evolution

KW - galaxies: formation

KW - galaxies: high-redshift

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