Environmental processing in cluster core galaxies at z=1.7

Abstract

Today, the brightest cluster galaxies (BCGs) are passive and very massive galaxies at the center of their clusters, and they still accrete mass through swallowing companions and gas from cooling flows. However their formation history is not well known. We report CO(4$\to$3) and continuum map observations of the SpARCS1049+56 BCG at $z=1.709$, one of the most distant known BCGs. Our observations yield $M_{{\mathrm{H}}_2}<1.1\times 10^{10}{M}_{\odot }$ for the BCG; while in CO(4$\to$3), we detect two gas-rich companions at the northeast and southeast of the BCG, within 20 kpc, with $L_{\mathrm{CO}(4\to 3)}^{\prime }=(5.8\pm 0.6)\times 10^9$ K km s${}^{-1}$ pc${}^2$ and $(7.4\pm 0.7)\times 10^9$ K km s${}^{-1}$ pc${}^2$, respectively. The northern companion is associated with a pair of merging cluster galaxies, while the southern one shows a southern tail in CO(4$\to$3), which was also detected in continuum, and we suggest it to be the most distant jellyfish galaxy for which ram pressure stripping is effectively able to strip off its dense molecular gas. This study probes the presence of rare gas-rich systems in the very central region of a distant cluster core, which will potentially merge into the BCG itself. Currently, we may thus be seeing the reversal of the star formation versus density relation at play in the distant universe. This is the first time the assembly of high-$z$ progenitors of our local BCGs can be studied in such great detail.

arXiv comment6 pages, 3 figures, accepted for publication in A&A Letters

References in corpus (60)

• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• The hierarchical formation of the brightest cluster galaxies
• The Environmental Dependence of the Relations between Stellar Mass, Structure, Star Formation and Nuclear Activity in Galaxies
• Cool Gas in High Redshift Galaxies
• Molecular Gas at High Redshift
• A very deep Chandra observation of the Perseus cluster: shocks, ripples and conduction
• ISM masses and the star formation law at Z = 1 to 6 // ALMA observations of dust continuum in 145 galaxies in the COSMOS survey field
• The detection of molecular gas in the central galaxies of cooling-flow clusters
• Evolution of Interstellar Medium, Star Formation, and Accretion at High Redshift
• 350 Micron Dust Emission from High Redshift Quasars
• The Evolution of ISM Mass Probed by Dust Emission -- ALMA Observations at z = 0.3 to 2
• Cold molecular gas in cooling flow clusters of galaxies
• Planck Early Results: Thermal dust in Nearby Molecular Clouds
• Discovery of a galaxy cluster with a violently starbursting core at z=2.506
• Cold molecular gas in the Perseus cluster core - Association with X-ray cavity, Halpha filaments and cooling flow -
• Spectroscopic Confirmation of the Rich z=1.80 Galaxy Cluster JKCS 041 Using the WFC3 Grism: Environmental Trends in the Ages and Structure of Quiescent Galaxies
• Evidence for Significant Growth in the Stellar Mass of Brightest Cluster Galaxies over the Past 10 Billion Years
• Cold, clumpy accretion onto an active supermassive black hole
• Enhanced star formation in both disks and ram pressure stripped tails of GASP jellyfish galaxies
• Early assembly of the most massive galaxies
• Gas filaments of the cosmic web located around active galaxies in a proto-cluster
• IDCS J1426+3508: Discovery of a Massive, IR-Selected Galaxy Cluster at z = 1.75
• Ubiquitous cold and massive filaments in cool core clusters
• Abundant molecular gas and inefficient star formation in intracluster regions: Ram pressure stripped tail of the Norma galaxy ESO137-001
• CO(4-3) and dust emission in two powerful high-z radio galaxies, and CO lines at high redshifts
• Planck early results. XXI. Properties of the interstellar medium in the Galactic plane
• A Ten Billion Solar Mass Outflow of Molecular Gas Launched by Radio Bubbles in the Abell 1835 Brightest Cluster Galaxy
• Brightest Cluster Galaxies at the Present Epoch
• Driving massive molecular gas flows in central cluster galaxies with AGN feedback
• ALMA unveils widespread molecular gas clumps in the ram pressure stripped tail of the Norma jellyfish galaxy
• Molecular Gas in the Halo Fuels the Growth of a Massive Cluster Galaxy at High Redshift
• WFC3 grism confirmation of the distant cluster Cl J1449+0856 at z=2.00: Quiescent and star-forming galaxy populations
• The unexpectedly large dust and gas content of quiescent galaxies at z>1.4
• Star-Forming Brightest Cluster Galaxies at 0.25 < z < 1.25: A Transitioning Fuel Supply
• Molecular Gas Dominated 50 kpc Ram Pressure Stripped Tail of the Coma Galaxy D100
• Measures of galaxy dust and gas mass with Herschel photometry and prospects for ALMA
• Little change in the sizes of the most massive galaxies since z = 1
• GASP XXIII: A jellyfish galaxy as an astrophysical laboratory of the baryonic cycle
• The emissivity of dust grains in spiral galaxies
• Massive molecular gas flows in the Abell 1664 brightest cluster galaxy
• IDCS J1426.5+3508: Sunyaev-Zel'dovich Measurement of a Massive IR-selected Cluster at z=1.75
• Ultra-Violet Imaging Telescope view of ram-pressure stripping in action: Star formation in the stripped gas of the GASP jellyfish galaxy JO201 in Abell 85
• A direct constraint on the gas content of a massive, passively evolving elliptical galaxy at z = 1.43
• An Extreme Starburst in Close Proximity to the Central Galaxy of a Rich Galaxy Cluster at z=1.7
• Galaxies in X-ray Selected Clusters and Groups in Dark Energy Survey Data I: Stellar Mass Growth of Bright Central Galaxies Since z~1.2
• CO(1-0) detection of molecular gas in the massive Spiderweb Galaxy (z=2)
• The Rarity of Star Formation in Brightest Cluster Galaxies as Measured by WISE
• The State of the Warm and Cold Gas in the Extreme Starburst at the Core of the Phoenix Galaxy Cluster (SPT-CLJ2344-4243)
• ROSAT PSPC observations of Cygnus-A : X-ray spectra of the cooling flow and hot spots
• The Relation Between Line Emission and Brightest Cluster Galaxies in Three Exceptional Clusters: Evidence for Gas Cooling from the ICM
• Extremely Low Molecular Gas Content in a Compact, Quiescent Galaxy at z=1.522
• Evidence for ram pressure stripping in a cluster of galaxies at z=0.7
• Red but not dead : Unveiling the Star-forming Far-infrared Spectral Energy Distribution of SpARCS Brightest Cluster Galaxies at 0 < z < 1.8
• The insignificant evolution of the richness-mass relation of galaxy clusters
• Detection of a Substantial Molecular Gas Reservoir in a brightest cluster galaxy at z = 1.7
• The Dust and Molecular Gas in the Brightest Cluster Galaxy in MACS 1931.8-2635
• Molecular gas in radio galaxies in dense Mpc-scale environments at $z=0.4-2.6$
• Jellyfish: Resolving the kinematics of extreme ram-pressure stripping at $z\sim 0.3$
• A Thirty Kiloparsec Chain of "Beads on a String" Star Formation Between Two Merging Early Type Galaxies in the Core of a Strong-Lensing Galaxy Cluster
• Multiwavelength radio observations of a Brightest Cluster Galaxy at z=1.71: Detection of a modest Active Galactic Nucleus and evidence for extended star formation

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• Molecular gas in CLASH brightest cluster galaxies at $z\sim 0.2-0.9$
• Evidence of runaway gas cooling in the absence of supermassive black hole feedback at the epoch of cluster formation
• Multiwavelength view of SPT-CL J2106-5844. The radio galaxies and the thermal and relativistic plasmas in a massive galaxy cluster merger at z~1.13
• NOEMA observations support a recoiling black hole in 3C186
• Star forming and gas rich brightest cluster galaxies at $z\sim 0.4$ in the Kilo-Degree Survey
• A GMOS/IFU Study of Jellyfish Galaxies in Massive Clusters
• Star forming brightest cluster galaxies at $z\sim 0.4$ in KiDS. Further studies of cold gas and stellar properties
• Effects of Environment on the Size Evolution of Quiescent Galaxies: Comparing Galaxies in Clusters and in the Field at Two Rest-frame Wavelengths
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• An Assessment of the In-Situ Growth of the Intracluster Light in the High Redshift Galaxy Cluster SpARCS1049+56