Results 141 to 150 of about 90,689 (284)

The ROSAT-ESO Flux Limited X-ray Galaxy Cluster Survey (REFLEX II) I. Newly identified X-ray luminous clusters at z>=0.2

, 2011
We report 19 intermediate redshift clusters newly detected in the ROSAT All-Sky survey that are spectroscopically confirmed. They form a part of 911 objects in the REFLEX II cluster catalogue with a limiting flux of 1.8\times10^12 erg/s/cm2 in the 0.1-2 ...
Abell, Abell, Allen, Arnaud, Böhringer, Böhringer, Dickey, G. Chon, Guzzo, H. Böhringer, Jones, Kurtz, Navarro, Planck Collaboration, Planck Collaboration, Pratt, Sunyaev   +16 more
core   +1 more source

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

The 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, Tao Wang, Ke Xu, Emanuele Daddi, Qing Gu, Tadayuki Kodama, Anita Zanella, David Elbaz, Ichi Tanaka, Raphael Gobat, Qi Guo, Jiaxin Han, Shiying Lu, Luwenjia Zhou   +13 more
doaj   +1 more source

Cluster Mass Reconstruction by a Weak Shear Field

, 1999
The tidal gravitational field of galaxy clusters causes a coherent distortion of the images of background sources. Since the distribution of image distortions, namely the shear field, traces the local gravitational potential of a deflector, it can be ...
Futamase, Toshifumi, Tada, Masashi, Umetsu, Keiichi   +2 more
core   +3 more sources

A search for high redshift clusters associated with radio galaxies at 2 < z < 4 [PDF]

, 2001
High redshift radio galaxies are amongst the most massive galaxies in the early Universe and have properties expected from central galaxies in forming clusters.
Kurk, J. D., Miley, G. K., Pentericci, L., Roettgering, H. J. A., Venemans, B. P.   +4 more
core   +1 more source

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

The 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, Tao Wang, Emanuele Daddi, Qiaoyang Hao, Ke Xu, David Elbaz, Luwenjia Zhou, Houjun Mo, Huiyuan Wang, Longyue Chen, Yangyao Chen, Shuowen Jin, Yipeng Lyu, Nikolaj Sillassen, Kai Wang, Tiancheng Yang   +15 more
doaj   +1 more source

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

The 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, Mohamed H. Abdullah, Gillian Wilson, Michael L. Balogh, Raouf H. Mabrouk   +4 more
doaj   +1 more source

Constraints on cold dark matter theories from observations of massive x-ray-luminous clusters of galaxies at high redshift [PDF]

, 1995
G. A. Luppino, I. M. Gioia
openalex   +1 more source

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

The 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, Aoi Hashiguchi, Naomi Ota, Masamune Oguri, Nobuhiro Okabe, Yoshihiro Ueda, Masatoshi Imanishi, Atsushi J. Nishizawa, Tomotsugu Goto, Bau-Ching Hsieh, Marie Kondo, Shuhei Koyama, Kianhong Lee, Ikuyuki Mitsuishi, Tohru Nagao, Taira Oogi, Koki Sakuta, Malte Schramm, Anri Yanagawa, Anje Yoshimoto   +19 more
doaj   +1 more source

The Evolution of Cluster Early-Type Galaxies over the Past 8 Gyr

, 2009
We present the Fundamental Plane (FP) of early-type galaxies in the clusters of galaxies RXJ1415.1+3612 at z=1.013. This is the first detailed FP investigation of cluster early-type galaxies at redshift z=1.
Balogh, Barr, Barr, Bell, Bender, Bernardi, Branchesi, Carlstrom, Chiboucas, Cooper, Cowie, Cucciati, Demarco, di Serego Alighieri, Djorgovski, Dressler, Faber, Ferreras, Finoguenov, Fritz, Fritz, Fritz, Gebhardt, Gladders, Glazebrook, Holden, Hook, Jørgensen, Jørgensen, Jørgensen, Jørgensen, Jørgensen, Jørgensen, Jørgensen, Lawrence, Lidman, Mei, Peng, Romer, Rosati, Stanford, Stanford, Stanford, Thomas, Treu, van Dokkum, Wuyts   +46 more
core   +1 more source

Multiobject Spectroscopy of Galaxy Clusters at z ∼ 0.95 in the Ultra Deep Survey Field with Different Star Formation Properties and Large-scale Environments

The Astrophysical Journal Supplement Series
While galaxy clusters are dominated by quiescent galaxies in the local Universe, they show a wide range in quiescent galaxy fraction (QF) at higher redshifts.
Seong-Kook Lee, Myungshin Im, Bomi Park, Minhee Hyun, Insu Paek, Dohyeong Kim   +5 more
doaj   +1 more source