Results 11 to 20 of about 90,689 (284)
New spectroscopic confirmations of high-redshift galaxy clusters [PDF]
Astronomy & Astrophysics, 2005 We present new spectroscopic data in the field of five high-redshift (z>=0.6) candidate galaxy clusters, drawn from the EIS Cluster Candidate Catalog. A total of 327 spectra were obtained using FORS1 at the VLT, out of which 266 are galaxies with secure redshifts.
Olsen, L.F. +7 more
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What are protoclusters? – Defining high-redshift galaxy clusters and protoclusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 We explore the structures of protoclusters and their relationship with high redshift clusters using the Millennium Simulation combined with a semi-analytic model. We find that protoclusters are very extended, with 90 per cent of their mass spread across $\sim35\,h^{-1}{\rm Mpc}$ comoving at $z=2$ ($\sim30\, \rm{arcmin}$).
Muldrew, Stuart I. +2 more
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Neutral hydrogen surveys for high-redshift galaxy clusters and protoclusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2004 We discuss the possibility of performing blind surveys to detect large-scale features of the universe using 21cm emission. Using instruments with approx. 5'-10' resolution currently in the planning stage, it should be possible to detect virialized galaxy clusters at intermediate redshifts using the combined emission from their constituent galaxies, as ...
Battye, RA, Davies, RD, Weller, J
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Optical signatures of high-redshift galaxy clusters [PDF]
The Astrophysical Journal, 1994 We combine an N-body and gasdynamic simulation of structure formation with an updated population synthesis code to explore the expected optical characteristics of a high-redshift cluster of galaxies. We examine a poor (2 keV) cluster formed in a biased, cold dark matter cosmology and employ simple, but plausible, threshold criteria to convert gas into ...
Evrard, August E., Charlot, S.
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The clustering and host haloes of galaxy mergers at high redshift [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 10 pages, 5 figures, accepted in MNRAS, version matches published ...
Andrew Wetzel, J. D. Cohn, Martin White
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Weak Lensing by High‐Redshift Clusters of Galaxies. I. Cluster Mass Reconstruction [PDF]
The Astrophysical Journal, 2000 43 pages, 15 figures, uses aastex, submitted to ApJ 4 color plates produced here as jpg's, larger versions of the jpgs can be found at http://www.mpa-garching.mpg.de ...
Douglas Clowe +3 more
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A critical analysis of high-redshift, massive, galaxy clusters. Part I [PDF]
Journal of Cosmology and Astroparticle Physics, 2012 20 pages, 6 figures, 2 tables, modified to match accepted version (JCAP); title changed, main analysis unchanged, additional ...
Ben Hoyle +3 more
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Galaxy Clusters and Large Scale Structure at High Redshifts [PDF]
, 1998 We present a detailed study of a rich galaxy cluster at z=2.38. We demonstrate that this cluster contains large overdensities of damped Ly-alpha absorption lines, of Ly-alpha emitting galaxies and of extremely red objects. The overdensity of extremely red objects in this field demonstrates that many are high z galaxies.
Paul Francis +2 more
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A sample of 1959 massive galaxy clusters at high redshifts [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 We identify a sample of 1959 massive clusters of galaxies in the redshift range of 0.70.75. By comparing them with clusters at lower redshifts, we confirm that richer clusters host more luminous brightest cluster galaxies (BCGs) also at high redshifts, and that the fraction of blue galaxies is larger in clusters at higher redshifts. A small fraction of
Wen, Z. L., Han, J. L.
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The mass-concentration relation in massive galaxy clusters at redshift ~1 [PDF]
, 2013 Mass and concentration of clusters of galaxies are related and evolving with redshift. We study the properties of a sample of 31 massive galaxy clusters at high redshift, 0.8 < z < 1.5, using weak and strong lensing observations. Concentration is a steep
Covone, Giovanni, Sereno, Mauro
core +3 more sources