Results 111 to 120 of about 15,250,094 (223)

Weak Lensing by High‐Redshift Clusters of Galaxies. I. Cluster Mass Reconstruction

open access: yesThe 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 ...
Clowe, D.   +3 more
openaire   +2 more sources

A 100 Mpc2 Structure Traced by Hyperluminous Galaxies around a Massive z = 2.85 Protocluster

open access: yesThe Astrophysical Journal
We present wide-field mapping at 850 μ m and 450 μ m of the z = 2.85 protocluster in the HS 1549+19 field using the Submillimetre Common-User Bolometer Array 2. Spectroscopic follow-up of 18 bright sources selected at 850 μ m, using the Northern Extended
George C.P. Wang   +11 more
doaj   +1 more source

A high redshift sample of x-ray selected galaxy clusters [PDF]

open access: yes, 1998
This thesis describes the creation of a X-ray selected galaxy cluster catalogue — the Southern Serendipitous High-redshift Archival ROSAT Cluster (SHARC) catalogue — and the use of the high-redshift subsample in constraining models of structure formation.
Burke, Douglas John
core  

JWST’s First Glimpse of a z > 2 Forming Cluster Reveals a Top-heavy Stellar Mass Function

open access: yesThe Astrophysical Journal Letters
Clusters and their progenitors (protoclusters) at z ∼ 2 − 4, the peak epoch of star formation, are ideal laboratories to study the formation process of both the clusters themselves and their member galaxies.
Hanwen Sun   +13 more
doaj   +1 more source

Euclid preparation

open access: yesAstronomy & Astrophysics
We present our methodology for identifying known clusters as counterparts to objects in the Euclid Catalogue of Galaxy Clusters (ECGC). Euclid is expected to detect a large number of optically selected galaxy clusters over the approximately 14 000 square
Melin J.-B.   +316 more
doaj   +1 more source

The Bigfoot: A Footprint of a Coma Cluster Progenitor at z = 3.98

open access: yesThe Astrophysical Journal Letters
Protoclusters, galaxy clusters’ high-redshift progenitors, hold the key to understanding the formation and evolution of clusters and their member galaxies. However, their cosmological distances and spatial extensions (tens of Mpc) have inhibited complete
Hanwen Sun   +15 more
doaj   +1 more source

The luminosity function of low-redshift abell galaxy clusters [PDF]

open access: yes, 2007
We present the results from a survey of 57 low-redshift Abell galaxy clusters to study the radial dependence of the luminosity function (LF). The dynamical radius of each cluster, r200 , was estimated from the photometric measurement of cluster richness,
OMAR LOPEZ CRUZ
core  

Testing the Standard Cosmological Model [PDF]

open access: yes, 2011
This thesis exploits the wealth of information contained in the existing cosmological surveys, and demonstrates how the use of tools such as two-point statistics permit the extraction of such information.
SAWANGWIT, UTANE
core  

The Hot and Energetic Universe:The evolution of galaxy groups and clusters [PDF]

open access: yes, 2013
Major astrophysical questions related to the formation and evolution of structures, and more specifically of galaxy groups and clusters, will still be open in the coming decade and beyond: what is the interplay of galaxy, supermassive black hole, and ...
Bourdin, H.   +47 more
core  

Dynamical Properties and Velocity Dispersion–Mass Relation of z ∼ 1 Galaxy Clusters from the GOGREEN and GCLASS Surveys

open access: yesThe Astrophysical Journal
We investigate a sample of 14 galaxy clusters from the GOGREEN and GCLASS (GG) spectroscopic data sets within the redshift range 0.87 ≤ z ≤ 1.37 and cluster masses M _200 ≳ 2 × 10 ^14 h ^−1 M _⊙ .
Shrouk Abdulshafy   +4 more
doaj   +1 more source

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