IDCS J1426.5+3508: DISCOVERY OF A MASSIVE, INFRARED-SELECTED GALAXY CLUSTER AT<i>z</i>= 1.75

Stanford, S. A.; Brodwin, M.; Gonzalez, Anthony H.; Zeimann, Greg; Stern, Daniel; Dey, Arjun; Eisenhardt, Peter; Snyder, Gregory F.; Mancone, Conor L.

doi:10.1088/0004-637x/753/2/164

Cited by 152 publications

(188 citation statements)

References 44 publications

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“…Similar X-ray flux estimations were derived in galaxy proto-clusters at comparable high redshifts Papovich et al 2010;Gobat et al 2011), although, as for the MRC 0156-252 field, both these proto-clusters also host a number of X-ray AGN that made it challenging to estimate a reliable X-ray flux for the ICM. These estimations are still however ∼5−10 times fainter than the X-ray emission in the highest redshift confirmed X-ray selected galaxy clusters (e.g., z ∼ 1.6; Fassbender et al 2011) or mid-infrared selected galaxy clusters (z = 1.75; Stanford et al 2012) and (z ∼ 1.4−1.5; Brodwin et al 2011) which are most probably more advanced collapsed galaxy structures than the present proto-cluster.…”

Section: X-ray Extended Emission From the Icm?mentioning

confidence: 55%

A large-scale galaxy structure atz = 2.02 associated with the radio galaxy MRC 0156-252

Galametz

Stern

Pentericci

et al. 2013

A&A

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We present the spectroscopic confirmation of a structure of galaxies surrounding the radio galaxy MRC 0156-252 at z = 2.02. The structure was initially discovered as an overdensity of both near-infrared selected z > 1.6 and mid-infrared selected z > 1.2 galaxy candidates. We used the VLT/FORS2 multi-object spectrograph to target ∼80 high-redshift galaxy candidates, and obtain robust spectroscopic redshifts for more than half the targets. The majority of the confirmed sources are star-forming galaxies at z > 1.5. In addition to the radio galaxy, two of its close-by companions (<6 ) also show AGN signatures. Ten sources, including the radio galaxy, lie within | z − 2.020 | <0.015 (i.e., velocity offsets <1500 km s −1 ) and within projected 2 Mpc comoving of the radio galaxy. Additional evidence suggests not only that the galaxy structure associated with MRC 0156-252 is a forming galaxy cluster but also that this structure is most probably embedded in a larger-scale structure.

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Section: X-ray Extended Emission From the Icm?mentioning

confidence: 55%

A large-scale galaxy structure atz = 2.02 associated with the radio galaxy MRC 0156-252

Galametz

Stern

Pentericci

et al. 2013

A&A

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“…Such a combination may open a new window for the study of cluster evolution, since the main searches carried out so far at similar redshifts have selection functions that are different to that of sub-mm surveys. X-ray and Sunyaev-Zel'dovich (SZ) effect surveys preferentially find massive and evolved structures, dominated by passive early type galaxies; the body of work on SZ-detected clusters is growing quickly (Planck Collaboration 2011dWilliamson et al 2011;Story et al 2011;Stanford et al 2012;Stalder et al 2012) and maybe in a near future a number of objects similar to those discussed here will be directly observed. Optical/nearIR cluster-finding algorithms, depending on what detection technique is used, can be biased to red evolved galaxies (e.g.…”

Section: Discussionmentioning

confidence: 76%

Herschel-ATLAS:Plancksources in the phase 1 fields

Herranz

González‐Nuevo

Clements

et al. 2012

A&A

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We present the results of a cross-correlation of the Planck Early Release Compact Source catalogue (ERCSC) with the catalogue of Herschel-ATLAS sources detected in the phase 1 fields, covering 134.55 deg 2 . There are 28 ERCSC sources detected by Planck at 857 GHz in this area. As many as 16 of them are probably high Galactic latitude cirrus; 10 additional sources can be clearly identified as bright, low-z galaxies; one further source is resolved by Herschel as two relatively bright sources; and the last is resolved into an unusual condensation of low-flux, probably high-redshift point sources, around a strongly lensed Herschel-ATLAS source at z = 3.26. Our results demonstrate that the higher sensitivity and higher angular resolution H-ATLAS maps provide essential information for the interpretation of candidate sources extracted from Planck sub-mm maps.

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“…In comparison with most other (proto-)cluster search techniques at these redshifts, e.g. the "IRAC selection" (e.g., Papovich et al 2010;Stanford et al 2012), targeted searches around radio galaxies (e.g., Venemans et al 2007;Chiaberge et al 2010;Wylezalek et al 2013), 3D mapping (with spectroscopic or photometric redshifts, e.g., Diener et al 2013;Scoville et al 2013;Chiang et al 2014;Mei et al 2014), or overdensities of optically red galaxies (e.g., Andreon et al 2009;Spitler et al 2012), the approach discussed in this work is likely, by definition, to favor the most evolved environments, thus allowing a better probe of the diversity of cluster progenitors at a crucial time for the formation of both clusters and their massive galaxies.…”

Section: Discussion and Summarymentioning

confidence: 99%

Passive galaxies as tracers of cluster environments atz~ 2

Strazzullo

Daddi

Gobat

et al. 2015

A&A

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Even 10 billion years ago, the cores of the first galaxy clusters are often found to host a characteristic population of massive galaxies with already suppressed star formation. Here we search for distant cluster candidates at z ∼ 2 using massive passive galaxies as tracers. With a sample of ∼40 spectroscopically confirmed passive galaxies at 1.3 < z < 2.1, we tuned photometric redshifts of several thousand passive sources in the 2 sq. deg COSMOS field. This allowed us to map their density in redshift slices, probing the largescale structure in the COSMOS field as traced by passive sources. We report here on the three strongest passive galaxy overdensities that we identify in the range 1.5 < z < 2.5. While the actual nature of these concentrations still needs to be confirmed, we discuss their identification procedure and the arguments supporting them as candidate galaxy clusters (probably in the mid-10 13 M range). Although this search approach is probably biased toward more evolved structures, it has the potential of selecting still rare, clusterlike environments close to their epoch of first appearance, enabling new investigations of the evolution of galaxies in the context of structure growth.

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IDCS J1426.5+3508: DISCOVERY OF A MASSIVE, INFRARED-SELECTED GALAXY CLUSTER ATz= 1.75

Cited by 152 publications

References 44 publications

A large-scale galaxy structure atz = 2.02 associated with the radio galaxy MRC 0156-252

A large-scale galaxy structure atz = 2.02 associated with the radio galaxy MRC 0156-252

Herschel-ATLAS:Plancksources in the phase 1 fields

Passive galaxies as tracers of cluster environments atz~ 2

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