Results 121 to 130 of about 16,096,383 (218)

Line-of-Sight Structure Toward Strong Lensing Galaxy Clusters

open access: yes
Spectroscopic and photometric catalogs of galaxies analyzed in Bayliss et al. study of line of sight structure toward strong lensing galaxy clusters. There are two types of ASCII tables, one containing the photometric and redshift data for each galaxy ...
Matthew B Bayliss
core   +1 more source

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

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

Galaxy Clusters Across the Electromagnetic Spectrum [PDF]

open access: yes, 2016
Galaxy clusters are the largest gravitationally bound objects in the Universe. From radio to X-ray, we have observed these objects across the electromagnetic spectrum.
Griffin, Rhiannon
core  

Deep Chandra Observations of the z = 1.16 Relaxed, Cool-core Galaxy Cluster SPT-CL J2215-3537

open access: yesThe Astrophysical Journal
Galaxy clusters serve as a unique and valuable laboratory for probing cosmological models and understanding astrophysics at the high-mass limit of structure formation.
Haley R. Stueber   +12 more
doaj   +1 more source

The statistical lensing of QSOs [PDF]

open access: yes, 2003
We use the 2dF QSO Redshift Survey, to investigate whether QSOs are detectably gravitationally lensed. Lensing could magnify and distort light from QSOs, influencing QSO numbers near galaxies, which trace structure in our Universe. Following Boyle, Fong &
Myers, Adam David
core  

Active Galactic Nucleus Properties of ∼1 Million Member Galaxies of Galaxy Groups and Clusters at z < 1.4 Based on the Subaru Hyper Suprime-Cam Survey

open access: yesThe Astrophysical Journal
Herein, we present the statistical properties of active galactic nuclei (AGNs) for approximately 1 million member galaxies of galaxy groups and clusters with 0.1 < cluster redshift ( z _cl ) < 1.4 selected using the Subaru Hyper Suprime-Cam, the so ...
Yoshiki Toba   +19 more
doaj   +1 more source

A faint galaxy redshift survey behind massive clusters [PDF]

open access: yes, 1999
This thesis is concerned with the gravitational lensing effect by massive galaxy clusters. We have explored a new technique for measuring galaxy masses and for detecting high-z galaxies by their optical colors.
Frye, Brenda
core  

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