Open Access
The era of star formation in galaxy clusters: implications for the Euclid cluster survey
Mark Brodwin
- pp 26
TLDR
In this paper, the authors analyzed the star formation properties of 16 infrared-selected, spectroscopically confirmed galaxy clusters at 1 1.35 GHz and showed that the starburst activity is likely merger-driven and that subsequent quenching is due to feedback from merger-fueled AGNs.Abstract:
We analyze the star formation properties of 16 infrared-selected, spectroscopically confirmed galaxy clusters at 1 1.35. Using infrared luminosities measured with deep Spitzer/Multiband Imaging Photometer for Spitzer observations at 24 μm, along with robust optical + IRAC photometric redshifts and spectral-energy-distribution-fitted stellar masses, we present the dust-obscured star-forming fractions, star formation rates, and specific star formation rates in these clusters as functions of redshift and projected clustercentric radius. We find that z ~ 1.4 represents a transition redshift for the ISCS sample, with clear evidence of an unquenched era of cluster star formation at earlier times. Beyond this redshift, the fraction of star-forming cluster members increases monotonically toward the cluster centers. Indeed, the specific star formation rate in the cores of these distant clusters is consistent with field values at similar redshifts, indicating that at z > 1.4 environment-dependent quenching had not yet been established in ISCS clusters. By combining these observations with complementary studies showing a rapid increase in the active galactic nucleus (AGN) fraction, a stochastic star formation history, and a major merging episode at the same epoch in this cluster sample, we suggest that the starburst activity is likely merger-driven and that the subsequent quenching is due to feedback from merger-fueled AGNs. The totality of the evidence suggests we are witnessing the final quenching period that brings an end to the era of star formation in galaxy clusters and initiates the era of passive evolution.read more
Citations
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Journal ArticleDOI
The Evolution of Early-Type Galaxies in Distant Clusters
TL;DR: In this article, an optical-IR photometric study of early-type galaxies in 19 galaxy clusters out to z = 0.9 was performed, showing that the color evolution of the early type galaxies becomes bluer with increasing redshift, consistent with the passive evolution of an old stellar population formed at an early cosmic epoch.
AGES: The AGN and Galaxy Evolution Survey
TL;DR: The AGN and Galaxy Evolution Survey (AGES) as discussed by the authors is a redshift survey covering, in its standard fields, 7.7 deg{sup 2} of the NOAO Deep Wide-Field Survey.
The evolution of active galactic nuclei in clusters of galax ies to redshift 1.3
TL;DR: In this paper, the authors measured the luminous AGN population in a large sample of clusters of galaxies and found evidence for a substantial increase in the cluster AGNs population from z � 0.05 to z � 1.3, which corresponds to a threefold increase compared to their previous work at high redshift.
Journal ArticleDOI
The Gemini Cluster Astrophysics Spectroscopic Survey (GCLASS): The Role of Environment and Self-Regulation in Galaxy Evolution at z ~ 1
Adam Muzzin,Adam Muzzin,Gillian Wilson,Howard Yee,David Gilbank,Henk Hoekstra,Ricardo Demarco,Michael L. Balogh,Pieter G. van Dokkum,Marijn Franx,Erica Ellingson,Amalia Hicks,J. Nantais,Allison Noble,Mark Lacy,Chris Lidman,Alessandro Rettura,Jason Surace,T. M. A. Webb +18 more
TL;DR: In this paper, the effects of environment and stellar mass on galaxy properties at 0.85 9.3 1 were evaluated and it was shown that the environment's primary role is to control the fraction of star-forming galaxies.
Journal ArticleDOI
The Ages of Passive Galaxies in a z=1.62 Protocluster
Donald B. Lee-Brown,Gregory Rudnick,Ivelina Momcheva,Casey Papovich,Jennifer M. Lotz,Kim-Vy Tran,Brittany Henke,Christopher N. A. Willmer,Gabriel B. Brammer,Mark Brodwin,James Dunlop,Duncan Farrah +11 more
TL;DR: In this paper, a study of the relation between galaxy stellar age and mass for 14 members of the $z=162$ protocluster IRC 218, using multiband imaging and HST G102 and G141 spectroscopy, was presented.
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