Results 71 to 80 of about 91,719 (307)

A New Galaxy Cluster Merger Capable of Probing Dark Matter: A56

The Astrophysical Journal, 2023
We report the discovery of a binary galaxy cluster merger via a search of the redMaPPer optical cluster catalog, with a projected separation of 535 kpc between the brightest cluster galaxies (BCGs).
David Wittman, Rodrigo Stancioli, Kyle Finner, Faik Bouhrik, Reinout van Weeren, Andrea Botteon   +5 more
doaj   +1 more source

The shapes of brightest cluster galaxies

The Astrophysical Journal, 1993
The mean isophotal axis ratios are computed for a complete sample of 119 brightest cluster galaxies (BCGs) in Abell clusters. The cumulative distribution function F(q) of axis ratios for the BCGs differs from F(q) for a sample of ordinary elliptical galaxies at only the P=0.14 probability level, as measured by a Kolmogorov Smirnov test.
Barbara S. Ryden, Tod R. Lauer, Marc Postman   +2 more
openaire   +1 more source

THE EVOLUTION OF BRIGHTEST CLUSTER GALAXIES IN A HIERARCHICAL UNIVERSE [PDF]

The Astrophysical Journal, 2012
We investigate the evolution of Brightest Cluster Galaxies (BCGs) from redshift z~1.6 to z~0. We use the semi-analytic model of Croton et al. (2006) with a new spectro-photometric model based on the Maraston (2005) stellar populations and a new recipe for the dust extinction. We compare the model predictions of the K-band luminosity evolution and the J-
Tonini, Chiara, Bernyk, Maksym, Croton, Darren, Maraston, Claudia, Thomas, Daniel   +4 more
openaire   +3 more sources

Internal dynamics of the galaxy cluster Abell 545

, 2011
Diffuse radio emission in galaxy clusters, and their connection with cluster mergers, are still debated. We seek to explore the internal dynamics of the radio halo cluster Abell 545.
Abell, Anders, Ashman, Bacchi, Bardelli, Barrena, Barrena, Barrena, Beers, Beers, Beers, Beers, Beers, Bekki, Bell, Bertin, Binggelli, Bird, Biviano, Bonafede, Boschin, Boschin, Boschin, Boschin, Brunetti, Bullock, Buote, Buote, Böhringer, Carlberg, Cassano, Cassano, Cassano, Cassano, Cassano, Cavaliere, Chilingarian, Chilingarian, D. Eckert, Danese, David, den Hartog, Dolag, Dolag, Donnert, Dressler, Dubinsky, Ellingson, Ensslin, Ensslin, Ensslin, Fadda, Fasano, Ferrari, Ferrari, Ferrari, Finoguenov, Fukugita, Giovannini, Giovannini, Girardi, Girardi, Girardi, Girardi, Girardi, Girardi, Goto, Govoni, Hashimoto, Henriksen, Henry, Hoeft, Kalberla, Kennicutt, Kneib, Landolt, Leccardi, Leccardi, Limber, Lin, Liu, Loeb, M. Girardi, M. Rossetti, Malumuth, Markevitch, Markevitch, Mastropietro, Menci, Merritt, Million, Mushotzky, Navarro, Niederste-Ostholt, Nieto, Okabe, Owers, Pinkney, Pisani, Pisani, Quintana, R. Barrena, Ramella, Ramella, Ricker, Rines, Roettiger, Roettiger, Roettiger, Rossetti, Rudick, S. De Grandi, Salinas, Salinas, Sarazin, Sastry, Schlegel, Schneider, Springel, Struble, Struble, The, Tonry, Tribble, van Dokkum, W. Boschin, Wainer, West, White   +128 more
core   +1 more source

Environmental dependence of the structure of brightest cluster galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2005
11 pages, accepted for publication in ...
Brough, Sarah, Collins, Chris A., Burke, Douglas J., Lynam, P., Mann, R.   +4 more
openaire   +3 more sources

Investigating the M GCS–M h Relation in the Most Massive Galaxies

The Astrophysical Journal, 2023
The relation between the total mass contained in the globular clusters of a galaxy and the mass of its dark-matter halo has been found observationally to be nearly linear over five decades of mass.
Veronika Dornan, William E. Harris
doaj   +1 more source

Models for the magnitude-distribution of brightest cluster galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2001
Abstract submitted to AAS.
Bernstein, J. P., Bhavsar, Suketu P.
openaire   +2 more sources

The XMM Cluster Survey: the interplay between the brightest cluster galaxy and the intracluster medium via AGN feedback [PDF]

, 2012
Using a sample of 123 X-ray clusters and groups drawn from the XMM Cluster Survey first data release, we investigate the interplay between the brightest cluster galaxy (BCG), its black hole and the intracluster/group medium (ICM).
J. Stott, R. Hickox, A. Edge, C. Collins, M. Hilton, C. Harrison, A. Romer, P. Rooney, S. Kay, C. Miller, M. Sahlén, E. Lloyd-Davies, N. Mehrtens, B. Hoyle, A. Liddle, P. T. P. Viana, I. G. McCarthy, J. Schaye, C. Booth   +18 more
semanticscholar   +1 more source

Coevolution of Brightest Cluster Galaxies and Their Host Clusters in IllustrisTNG

The Astrophysical Journal, 2022
Abstract We use IllustrisTNG simulations to explore the dynamic scaling relation between massive clusters and their—central—brightest cluster galaxies (BCGs). The IllustrisTNG-300 simulation we use includes 280 massive clusters from the z = 0 snapshot with M 200 > 1014 M ...
Jubee Sohn, Margaret J. Geller, Mark Vogelsberger, Ivana Damjanov   +3 more
openaire   +2 more sources

Chandra Observations of A2670 and A2107: A Comet Galaxy and cDs with Large Peculiar Velocities

, 2005
We present an analysis of Chandra observations of the galaxy clusters A2670 and A2107. Their cD galaxies have large peculiar velocities (>200km/s) and thus the clusters appear to be undergoing mergers.
Fujita, Yutaka, Sarazin, Craig L., Sivakoff, Gregory R.   +2 more
core   +1 more source