Photometric redshifts for galaxies in the Subaru Hyper Suprime-Cam and unWISE and a catalogue of identified clusters of galaxies

2020/10/23 by Z. L. Wen, J. L. Han
Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Cluster (spacecraft) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy cluster #Photometric redshift #Physics #Redshift #Redshift survey #Stellar, planetary, and galactic studies #astro-ph.CO

paper · pdf · doi:10.1093/mnras/staa3308

16 pages, 18 figures, 2 tables, updated version after proof checking, online data available

openalex publication_date 2020/10/23 · openalex created_date 2020/10/29 · arxiv created 2020/11/19 · arxiv updated 2020/11/20 · openalex updated_date 2026/08/05

Abstract

ABSTRACT We first present a catalogue of photometric redshifts for 14.68 million galaxies derived from the 7-band photometric data of Hyper Suprime-Cam Subaru Strategic Program and the Wide-field Infrared Survey Explorer using the nearest-neighbour algorithm. The redshift uncertainty is about 0.024 for galaxies of z ≤ 0.7, and steadily increases with redshift to about 0.11 at z ∼ 2. From such a large data set, we identify 21 661 clusters of galaxies, among which 5537 clusters have redshifts z > 1 and 642 clusters have z > 1.5, significantly enlarging the high redshift sample of galaxy clusters. Cluster richness and mass are estimated, and these clusters have an equivalent mass of M500 ≥ 0.7 × 1014 M⊙. We find that the stellar mass of the brightest cluster galaxies (BCGs) in each richness bin does not significantly evolve with redshift. The fraction of star-forming BCGs increases with redshift, but does not depend on cluster mass.

Citations

• AN OPTICAL CATALOG OF GALAXY CLUSTERS OBTAINED FROM AN ADAPTIVE MATCHED FILTER FINDER APPLIED TO SLOAN DIGITAL SKY SURVEY DATA RELEASE 6
• Chandra Cluster Cosmology Project III: Cosmological Parameter Constraints
• HUBBLE SPACE TELESCOPEWEAK-LENSING STUDY OF THE GALAXY CLUSTER XMMU J2235.3 – 2557 ATz∼ 1.4: A SURPRISINGLY MASSIVE GALAXY CLUSTER WHEN THE UNIVERSE IS ONE-THIRD OF ITS CURRENT AGE
• OCCUPATION OF X-RAY-SELECTED GALAXY GROUPS BY X-RAY ACTIVE GALACTIC NUCLEI
• ASPITZER-SELECTED GALAXY CLUSTER ATz= 1.62
• THE DEEP3 GALAXY REDSHIFT SURVEY: KECK/DEIMOS SPECTROSCOPY IN THE GOODS-N FIELD
• THE WIDE-FIELD INFRARED SURVEY EXPLORER (WISE): MISSION DESCRIPTION AND INITIAL ON-ORBIT PERFORMANCE
• EAZY: A Fast, Public Photometric Redshift Code
• The Red‐Sequence Cluster Survey. I. The Survey and Cluster Catalogs for Patches RCS 0926+37 and RCS 1327+29
• A GMBCG GALAXY CLUSTER CATALOG OF 55,424 RICH CLUSTERS FROM SDSS DR7
• The hierarchical formation of the brightest cluster galaxies
• Near-infrared evolution of brightest cluster galaxies in the most X-ray luminous clusters since z = 1
• A MaxBCG Catalog of 13,823 Galaxy Clusters from the Sloan Digital Sky Survey
• ANNz: Estimating Photometric Redshifts Using Artificial Neural Networks
• Toward a Halo Mass Function for Precision Cosmology: The Limits of Universality
• Galaxy clusters at 0.6 < z < 1.4 in the UKIDSS Ultra Deep Survey Early Data Release
• Galactic Stellar and Substellar Initial Mass Function
• The evolution in the stellar mass of brightest cluster galaxies over the past 10 billion years
• The Hyper Suprime-Cam SSP Survey: Overview and survey design
• The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the Extended Baryon Oscillation Spectroscopic Survey and from the Second Phase of the Apache Point Observatory Galactic Evolution Experiment
• Photometric Redshifts for the Hyper Suprime-Cam Subaru Strategic Program Data Release 2
• A standard stellar library for evolutionary synthesis