scholarly journals What are protoclusters? – Defining high-redshift galaxy clusters and protoclusters

2015 ◽  
Vol 452 (3) ◽  
pp. 2528-2539 ◽  
Author(s):  
Stuart I. Muldrew ◽  
Nina A. Hatch ◽  
Elizabeth A. Cooke
Keyword(s):  
Galaxy Clusters ◽  
High Redshift ◽  
Redshift Galaxy

scholarly journals Scaling Relations from Sunyaev‐Zel’dovich Effect andChandraX‐Ray Measurements of High‐Redshift Galaxy Clusters

2008 ◽  
Vol 675 (1) ◽  
pp. 106-114 ◽  
Author(s):  
Massimiliano Bonamente ◽  
Marshall Joy ◽  
Samuel J. LaRoque ◽  
John E. Carlstrom ◽  
Daisuke Nagai ◽  
...  
Keyword(s):  
Galaxy Clusters ◽  
High Redshift ◽  
Scaling Relations ◽  
Redshift Galaxy ◽  
Sunyaev Zel'dovich Effect

scholarly journals Implications of multiple high-redshift galaxy clusters

2011 ◽  
Vol 83 (10) ◽  
Author(s):  
Ben Hoyle ◽  
Raul Jimenez ◽  
Licia Verde
Keyword(s):  
Galaxy Clusters ◽  
High Redshift ◽  
Redshift Galaxy

scholarly journals First Weak-lensing Results from “See Change”: Quantifying Dark Matter in the Twoz≳ 1.5 High-redshift Galaxy Clusters SPT-CL J2040–4451 and IDCS J1426+3508

2017 ◽  
Vol 847 (2) ◽  
pp. 117 ◽  
Author(s):  
M. James Jee ◽  
Jongwan Ko ◽  
Saul Perlmutter ◽  
Anthony Gonzalez ◽  
Mark Brodwin ◽  
...  
Keyword(s):  
Dark Matter ◽  
Galaxy Clusters ◽  
High Redshift ◽  
Weak Lensing ◽  
Redshift Galaxy

scholarly journals On the Gas Surrounding High-Redshift Galaxy Clusters

2001 ◽  
Vol 18 (1) ◽  
pp. 64-75 ◽  
Author(s):  
Paul J. Francis ◽  
Greg M. Wilson ◽  
Bruce E. Woodgate
Keyword(s):  
Galaxy Clusters ◽  
Hydrogen Absorption ◽  
High Redshift ◽  
Neutral Hydrogen ◽  
Neutral Gas ◽  
Cluster Of Galaxies ◽  
Galaxy Halos ◽  
Redshift Galaxy ◽  
High Redshift Universe

AbstractFrancis & Hewett (1993) identified two 10 Mpc-scale regions of the high-redshift universe that were seemingly very overdense in neutral hydrogen. Subsequent observations showed that at least one of these gas-rich regions enveloped a cluster of galaxies at redshift 2 ·38. We present improved observations of the three background QSOs with sightlines passing within a few Mpc of this cluster of galaxies. All three QSOs show strong neutral hydrogen absorption at the cluster redshift, suggesting that this cluster (and perhaps all high-redshift clusters) may be surrounded by a ~5 Mpc-scale region containing ~10 12 Mʘ of neutral gas. We show that if most high-redshift clusters are surrounded by such regions, the gas must be in the form of many small (<1 kpc), dense (> 0·03 cm ˗3 ) clouds, each of mass <10 6 Mʘ . These clouds are themselves probably gathered into >20 kpc-sized clumps, which may be galaxy halos or protogalaxies. If this gas exists, it will be partially photoionised by the UV background. We predict the diffuse Lyα flux from this photoionisation, and place observational limits on its intensity.

scholarly journals The WARPS survey - IV. The X-ray luminosity-temperature relation of high-redshift galaxy clusters

2000 ◽  
Vol 315 (4) ◽  
pp. 669-678 ◽  
Author(s):  
B. W. Fairley ◽  
L. R. Jones ◽  
C. Scharf ◽  
H. Ebeling ◽  
E. Perlman ◽  
...  
Keyword(s):  
Galaxy Clusters ◽  
High Redshift ◽  
Temperature Relation ◽  
X Ray ◽  
Redshift Galaxy

scholarly journals The history of metal enrichment traced by X-ray observations of high redshift galaxy clusters

2021 ◽  
Author(s):  
Anthony M Flores ◽  
Adam B Mantz ◽  
Steven W Allen ◽  
R Glenn Morris ◽  
Rebecca E A Canning ◽  
...  
Keyword(s):  
Galaxy Clusters ◽  
High Redshift ◽  
Substantial Improvement ◽  
Metal Enrichment ◽  
X Ray ◽  
Redshift Galaxy ◽  
History Of ◽  
Mass Profile ◽  
Massive Clusters ◽  
Massive Galaxy

Abstract We present the analysis of deep X-ray observations of 10 massive galaxy clusters at redshifts 1.05 &lt; z &lt; 1.71, with the primary goal of measuring the metallicity of the intracluster medium (ICM) at intermediate radii, to better constrain models of the metal enrichment of the intergalactic medium. The targets were selected from X-ray and Sunyaev-Zel’dovich (SZ) effect surveys, and observed with both the XMM-Newton and Chandra satellites. For each cluster, a precise gas mass profile was extracted, from which the value of r500 could be estimated. This allows us to define consistent radial ranges over which the metallicity measurements can be compared. In general, the data are of sufficient quality to extract meaningful metallicity measurements in two radial bins, r &lt; 0.3r500 and 0.3 &lt; r/r500 &lt; 1.0. For the outer bin, the combined measurement for all ten clusters, Z/Z⊙ = 0.21 ± 0.09, represents a substantial improvement in precision over previous results. This measurement is consistent with, but slightly lower than, the average metallicity of 0.315 Solar measured at intermediate-to-large radii in low-redshift clusters. Combining our new high-redshift data with the previous low-redshift results allows us to place the tightest constraints to date on models of the evolution of cluster metallicity at intermediate radii. Adopting a power law model of the form Z∝(1 + z)γ, we measure a slope $\gamma = -0.5^{+0.4}_{-0.3}$, consistent with the majority of the enrichment of the ICM having occurred at very early times and before massive clusters formed, but leaving open the possibility that some additional enrichment in these regions may have occurred since a redshift of 2.

scholarly journals New spectroscopic confirmations of high-redshift galaxy clusters

2005 ◽  
Vol 442 (3) ◽  
pp. 841-849 ◽  
Author(s):  
L. F. Olsen ◽  
E. Zucca ◽  
S. Bardelli ◽  
C. Benoist ◽  
L. da Costa ◽  
...  
Keyword(s):  
Galaxy Clusters ◽  
High Redshift ◽  
Redshift Galaxy

scholarly journals More connected, more active: galaxy clusters and groups at z ∼ 1 and the connection between their quiescent galaxy fractions and large-scale environments

2019 ◽  
Vol 490 (1) ◽  
pp. 135-155 ◽  
Author(s):  
Seong-Kook Lee ◽  
Myungshin Im ◽  
Minhee Hyun ◽  
Bomi Park ◽  
Jae-Woo Kim ◽  
...  
Keyword(s):  
Star Formation ◽  
Galaxy Clusters ◽  
Large Scale ◽  
High Redshift ◽  
Galaxy Cluster ◽  
Spectroscopic Observation ◽  
Star Forming ◽  
Large Scale Structures ◽  
Photometric Redshift ◽  
Redshift Galaxy

ABSTRACT High-redshift galaxy clusters, unlike local counterparts, show diverse star formation activities. However, it is still unclear what keeps some of the high-redshift clusters active in star formation. To address this issue, we performed a multiobject spectroscopic observation of 226 high-redshift (0.8 < z < 1.3) galaxies in galaxy cluster candidates and the areas surrounding them. Our spectroscopic observation reveals six to eight clusters/groups at z ∼ 0.9 and z ∼ 1.3. The redshift measurements demonstrate the reliability of our photometric redshift measurements, which in turn gives credibility for using photometric redshift members for the analysis of large-scale structures (LSSs). Our investigation of the large-scale environment (∼10 Mpc) surrounding each galaxy cluster reveals LSSs – structures up to ∼10 Mpc scale – around many of, but not all, the confirmed overdensities and the cluster candidates. We investigate the correlation between quiescent galaxy fraction of galaxy overdensities and their surrounding LSSs, with a larger sample of ∼20 overdensities including photometrically selected overdensities at 0.6 < z < 0.9. Interestingly, galaxy overdensities embedded within these extended LSSs show a lower fraction of quiescent galaxies ($\sim 20{{\ \rm per\ cent}}$) than isolated ones at similar redshifts (with a quiescent galaxy fraction of $\sim 50 {{\ \rm per\ cent}}$). Furthermore, we find a possible indication that clusters/groups with a high quiescent galaxy fraction are more centrally concentrated. Based on these results, we suggest that LSSs are the main reservoirs of gas and star-forming galaxies to keep galaxy clusters fresh and extended in size at z ∼ 1.

scholarly journals THEHUBBLE SPACE TELESCOPECLUSTER SUPERNOVA SURVEY. II. THE TYPE Ia SUPERNOVA RATE IN HIGH-REDSHIFT GALAXY CLUSTERS

2011 ◽  
Vol 745 (1) ◽  
pp. 32 ◽  
Author(s):  
K. Barbary ◽  
G. Aldering ◽  
R. Amanullah ◽  
M. Brodwin ◽  
N. Connolly ◽  
...  
Keyword(s):  
Galaxy Clusters ◽  
High Redshift ◽  
Type Ia Supernova ◽  
Redshift Galaxy ◽  
Type Ia
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