TY - JOUR
T1 - First Results on the Cluster Galaxy Population from the Subaru Hyper Suprime-Cam Survey. III. Brightest Cluster Galaxies, Stellar Mass Distribution, and Active Galaxies
AU - Lin, Yen Ting
AU - Hsieh, Bau Ching
AU - Lin, Sheng Chieh
AU - Oguri, Masamune
AU - Chen, Kai Feng
AU - Tanaka, Masayuki
AU - Chiu, I. Non
AU - Huang, Song
AU - Kodama, Tadayuki
AU - Leauthaud, Alexie
AU - More, Surhud
AU - Nishizawa, Atsushi J.
AU - Bundy, Kevin
AU - Lin, Lihwai
AU - Miyazaki, Satoshi
N1 - Publisher Copyright:
© 2017. The American Astronomical Society. All rights reserved.
PY - 2017/12/20
Y1 - 2017/12/20
N2 - The unprecedented depth and area surveyed by the Subaru Strategic Program with the Hyper Suprime-Cam (HSCSSP) have enabled us to construct and publish the largest distant cluster sample out to z ∼ 1 to date. In this exploratory study of cluster galaxy evolution from z = 1 to z = 0.3, we investigate the stellar mass assembly history of brightest cluster galaxies (BCGs), the evolution of stellar mass and luminosity distributions, the stellar mass surface density profile, as well as the population of radio galaxies. Our analysis is the first high-redshift application of the top N richest cluster selection, which is shown to allow us to trace the cluster galaxy evolution faithfully. Over the 230 deg2 area of the current HSC-SSP footprint, selecting the top 100 clusters in each of the four redshift bins allows us to observe the buildup of galaxy population in descendants of clusters whose z ≈ 1 mass is about 2 × 1014 M⊙. Our stellar mass is derived from a machine-learning algorithm, which is found to be unbiased and accurate with respect to the COSMOS data. We find very mild stellar mass growth in BCGs (about 35% between z = 1 and 0.3), and no evidence for evolution in both the total stellar mass-cluster mass correlation and the shape of the stellar mass surface density profile. We also present the first measurement of the radio luminosity distribution in clusters out to z ∼ 1, and show hints of changes in the dominant accretion mode powering the cluster radio galaxies at z ∼ 0.8.
AB - The unprecedented depth and area surveyed by the Subaru Strategic Program with the Hyper Suprime-Cam (HSCSSP) have enabled us to construct and publish the largest distant cluster sample out to z ∼ 1 to date. In this exploratory study of cluster galaxy evolution from z = 1 to z = 0.3, we investigate the stellar mass assembly history of brightest cluster galaxies (BCGs), the evolution of stellar mass and luminosity distributions, the stellar mass surface density profile, as well as the population of radio galaxies. Our analysis is the first high-redshift application of the top N richest cluster selection, which is shown to allow us to trace the cluster galaxy evolution faithfully. Over the 230 deg2 area of the current HSC-SSP footprint, selecting the top 100 clusters in each of the four redshift bins allows us to observe the buildup of galaxy population in descendants of clusters whose z ≈ 1 mass is about 2 × 1014 M⊙. Our stellar mass is derived from a machine-learning algorithm, which is found to be unbiased and accurate with respect to the COSMOS data. We find very mild stellar mass growth in BCGs (about 35% between z = 1 and 0.3), and no evidence for evolution in both the total stellar mass-cluster mass correlation and the shape of the stellar mass surface density profile. We also present the first measurement of the radio luminosity distribution in clusters out to z ∼ 1, and show hints of changes in the dominant accretion mode powering the cluster radio galaxies at z ∼ 0.8.
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U2 - 10.3847/1538-4357/aa9bf5
DO - 10.3847/1538-4357/aa9bf5
M3 - Article
AN - SCOPUS:85039694766
SN - 0004-637X
VL - 851
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 139
ER -