The GOGREEN survey: Transition Galaxies and The Evolution of Environmental Quenching
Date Issued
2021
Author(s)
Karen McNab
•
Michael L. Balogh
•
Remco F. J. van der Burg
•
Anya Forestell
•
Kristi Webb
•
Benedetta Vulcani
•
Gregory Rudnick
•
Adam Muzzin
•
M. C. Cooper
•
Sean McGee
•
•
Pierluigi Cerulo
•
Jeffrey C. C. Chan
•
•
Ricardo Demarco
•
Alexis Finoguenov
•
Ben Forrest
•
Caelan Golledge
•
Pascale Jablonka
•
Chris Lidman
•
Julie Nantais
•
Lyndsay Old
•
Irene Pintos-Castro
•
Bianca Poggianti
•
Andrew M. M. Reeves
•
Gillian Wilson
•
Howard K. C. Yee
•
Dennis Zaritsky
Abstract
We measure the rate of environmentally-driven star formation quenching in
galaxies at $z\sim 1$, using eleven massive ($M\approx
2\times10^{14}\,\mathrm{M}_\odot$) galaxy clusters spanning a redshift range
$1.010.5$) we do not find any significant
excess of transition galaxies in clusters, relative to a comparison field
sample at the same redshift. It is likely that such galaxies were quenched
prior to their accretion in the cluster, in group, filament or protocluster
environments. For lower stellar mass galaxies
($9.5<\log{M/\mathrm{M}_\odot}<10.5$) there is a small but significant excess
of transition galaxies in clusters, accounting for an additional $\sim 5-10$
per cent of the population compared with the field. We show that our data are
consistent with a scenario in which 20--30 per cent of low-mass, star-forming
galaxies in clusters are environmentally quenched every Gyr, and that this rate
slowly declines from $z=1$ to $z=0$. While environmental quenching of these
galaxies may include a long delay time during which star formation declines
slowly, in most cases this must end with a rapid ($\tau<1$ Gyr) decline in star
formation rate.
Volume
508
Issue
1
Start page
157
Issn Identifier
0035-8711
Rights
open.access
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