A spectroscopic study of a rich cluster at z=1.52 with Subaru $\&$ LBT: the environmental impacts on the mass-metallicity relation

Abstract

We present the results of our near-infrared (NIR) spectroscopic observations of a rich cluster candidate around a radio galaxy at $z=1.52$ (4C65.22) with Subaru/MOIRCS and LBT/LUCI. We observed 71 galaxies mostly on the star-forming main sequence selected by our previous broad-band (photo-$z$) and narrow-band H$\alpha$ imaging observation in this cluster environment. We successfully confirmed the redshifts of 39 galaxies, and conclude that this is a gravitationally bound, real cluster at $z=1.517$. Our spectroscopic data also suggest a hint of large-scale filaments or sheet-like three-dimensional structures crossing at the highest-density cluster core. By stacking the spectra to derive their average interstellar medium (ISM) gas-phase metallicity based on the [NII]/H$\alpha$ emission line flux ratio, we find that the mass-metallicity relation (MZR) in the 4C65.22 cluster environment is consistent with that of H$\alpha$-selected field galaxies at similar redshifts. Our results suggest that the environmental impacts on the MZR is small at high redshifts, but a larger sample of high-$z$ clusters and their member galaxies is still required to fully address the effect of environment as well as its cluster-cluster variation.

14 pages, 6 figures

References in corpus (16)

• Mass and environment as drivers of galaxy evolution in SDSS and zCOSMOS and the origin of the Schechter function
• The Mass-Metallicity Relation at z~2
• Formation of Massive Galaxies at High Redshift: Cold Streams, Clumpy Disks and Compact Spheroids
• Constraining the Low-Mass Slope of the Star Formation Sequence at 0.5<z<2.5
• The Origin of the Galaxy Mass-Metallicity Relation and Implications for Galactic Outflows
• Clues to the Origin of the Mass-Metallicity Relation: Dependence on Star Formation Rate and Galaxy Size
• The Relation Between SFR and Stellar Mass for Galaxies at 3.5 $\le z\le$ 6.5 in CANDELS
• Evidence for Wide-Spread AGN Driven Outflows in the Most Massive z~1-2 Star Forming Galaxies
• The Star Formation Main Sequence in the Hubble Space Telescope Frontier Fields
• The Role of Environment in the Mass-Metallicity Relation
• The Halpha-based Star Formation Rate Density of the Universe at z=0.84
• An early phase of environmental effects on galaxy properties unveiled by near-infrared spectroscopy of protocluster galaxies at z>2
• Enrichment and Pre-Heating in Intragroup Gas from Galactic Outflows
• The Absence of an Environmental Dependence in the Mass-Metallicity Relation at z=2
• Metal deficiency in cluster star-forming galaxies at z=2
• The environmental impacts on the star formation main sequence: an H-alpha study of the newly discovered rich cluster at z=1.52

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• Signs of environmental effects on star-forming galaxies in the Spiderweb protocluster at z=2.16
• The MOSDEF Survey: Environmental dependence of the gas-phase metallicity of galaxies at $1.4\le z\le 2.6$
• The evolution of the mass-metallicity relations from the VANDELS survey and the GAEA Semi-Analytic model
• COALAS III: The ATCA CO(1-0) look at the growth and death of H$\alpha$ emitters in the Spiderweb protocluster at z=2.16
• Star Formation and Chemical Enrichment in Protoclusters
• Insights on Metal Enrichment and Environmental Effect at $z\approx 5-7$ with JWST ASPIRE/EIGER and Chemical Evolution Model
• Evidence for environmental effects in the $z=4.3$ protocluster core SPT2349$-$56
• Gas properties as a function of environment in the proto-supercluster Hyperion at z ~ 2.45