Mapping the large scale structure around a z=1.46 galaxy cluster in 3-D using two adjacent narrow-band filters

Abstract

We present a novel method to estimate accurate redshifts of star-forming galaxies by measuring the flux ratio of the same emission line observed through two adjacent narrow-band filters. We apply this method to our NB912 and new NB921 data taken with Suprime-Cam on the Subaru Telescope of a galaxy cluster, XMMXCS J2215.9-1738, at z=1.46 and its surrounding structures. We obtain redshifts for 170 [OII] emission line galaxies at z~1.46, among which 41 galaxies are spectroscopically confirmed with MOIRCS and FMOS on the Subaru mainly, showing an accuracy of $\sigma$((z-z_spec})/(1+z_spec))=0.002. This allows us to reveal filamentary structures that penetrate towards the centre of the galaxy cluster and intersect with other structures, consistent with the picture of hierarchical cluster formation. We also find that the projected celestial distribution does not precisely trace the real distribution of galaxies, indicating the importance of the three dimensional view of structures to properly identify and quantify galaxy environments. We investigate the environmental dependence of galaxy properties with local density, confirming that the median colour of galaxies becomes redder in higher density region while the star-formation rate of star-forming galaxies does not depend strongly on local environment in this structure. This implies that the star-forming activity in galaxies is truncated on a relatively short time scale in the cluster centre.

14 pages, 9 figures, 1 table, accepted for publication in MNRAS

References in corpus (19)

• COSMOS Photometric Redshifts with 30-bands for 2-deg2
• PRIMUS: Constraints on Star Formation Quenching and Galaxy Merging, and the Evolution of the Stellar Mass Function From z=0-1
• The Importance of Satellite Quenching for the Build-Up of the Red Sequence of Present Day Galaxies
• Subaru Deep Survey V. A Census of Lyman Break Galaxies at z=4 and 5 in the Subaru Deep Fields: Photometric Properties
• The Era of Star Formation in Galaxy Clusters
• A Wide-field Survey of Two Z~0.5 Galaxy Clusters: Identifying the Physical Processes Responsible for the Observed Transformation of Spirals into S0s
• HiZELS: a high redshift survey of H-alpha emitters. I: the cosmic star-formation rate and clustering at z=2.23
• The XMM Cluster Survey: A Massive Galaxy Cluster at z=1.45
• The DEEP2 galaxy redshift survey: the evolution of the blue fraction in groups and the field
• Clusters at Half Hubble Time: Galaxy Structure and Colors in RXJ0152.7-1357 and MS1054-03
• The Evolution of the Field and Cluster Morphology-Density Relation for Mass-Selected Samples of Galaxies
• A fundamental metallicity relation for galaxies at z = 0.84 - 1.47 from HiZELS
• Mass-Selection and the Evolution of the Morphology-Density Relation from z=0.8 to z=0
• The Complex Structure of the Cl 1604 Supercluster at z~0.9
• A large-scale galaxy structure at z = 2.02 associated with the radio galaxy MRC0156-252
• Caught in the act: Cluster `k+a' galaxies as a link between spirals and S0s
• The structure of the merging RCS 231953+00 Supercluster at z ~ 0.9
• Crosstalk Analysis of Suprime-Cam FDCCDs Using Cosmic Rays in Dark Frames
• A Large Scale Structure at Redshift 1.71 in the Lockman Hole

Cited by in corpus (20)

• Effects of Local Environment and Stellar Mass on Galaxy Quenching out to z~3
• MusE GAs FLOw and Wind (MEGAFLOW) II. A study of gas accretion around $z\approx 1$ star-forming galaxies with background quasars
• Cosmic Web and Star Formation Activity in Galaxies at z~1
• Surveying Galaxy Proto-clusters in Emission: A Large-scale Structure at z=2.44 and the Outlook for HETDEX
• Molecular gas reservoirs in cluster galaxies at z=1.46
• The ALMA-ALPAKA survey I: high-resolution CO and [CI] kinematics of star-forming galaxies at z = 0.5-3.5
• The environmental impacts on the star formation main sequence: an H-alpha study of the newly discovered rich cluster at z=1.52
• The KMOS Cluster Survey (KCS) I: The fundamental plane and the formation ages of cluster galaxies at redshift $1.4<z<1.6$
• The nature of H-alpha star-forming galaxies at z~0.4 in and around Cl 0939+4713: the environment matters
• Evolutionary phases of gas-rich galaxies in a galaxy cluster at z=1.46
• ALMA pin-points a strong over-density of U/LIRGs in the massive cluster XCS J2215 at z=1.46
• Cluster induced quenching of galaxies in the massive cluster XMMXCSJ2215.9-1738 at z~1.5 traced by enhanced metallicities inside half R200
• VIS3COS: I. survey overview and the role of environment and stellar mass on star formation
• The KMOS Cluster Survey (KCS) II - The Effect of Environment on the Structural Properties of Massive Cluster Galaxies at Redshift $1.39<z<1.61$
• High-resolution ALMA study of CO (2-1) line and dust continuum emissions in cluster galaxies at z = 1.46
• Similarities and uniqueness of Ly$\alpha$ emitters among star-forming galaxies at z=2.5
• The LEGA-C of nature and nurture in stellar populations of galaxies at z~0.6-1.0: D4000 and H-delta reveal different assembly histories for quiescent galaxies in different environments
• A Method to improve line flux and redshift measurements with narrowband filters
• Spectroscopic characterization of the protocluster of galaxies around 7C 1756+6520 at z ~ 1.4
• The effect of environment on the properties of the most massive galaxies at $0.5<z<2.5$ in the cosmos-dash field