Results 31 to 40 of about 1,023,991 (216)
Star clusters in unperturbed spiral galaxies [PDF]
, 2008 Stars do not form in isolation, they form in groups known as star clusters. Star clusters are seen in a wide range of galaxies and environments. Their presence reveals the history of the host galaxy and the processes of its star formation.
Mora, Marcelo D.
core +1 more source
A detection of wobbling brightest cluster galaxies within massive galaxy clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 A striking signal of dark matter beyond the standard model is the existence of cores in the centre of galaxy clusters. Recent simulations predict that a Brightest Cluster Galaxy (BCG) inside a cored galaxy cluster will exhibit residual wobbling due to previous major mergers, long after the relaxation of the overall cluster.
Harvey, David +3 more
openaire +3 more sources
Candidate fossil groups brightest central galaxies [Dataset]
, 2023 The formation process of fossil groups (FGs) is still under debate, and, due to the relative rarity of FGs, large samples of such objects are still missing.
Márquez, I.
core +1 more source
Secondary evolution of galaxies investigated by N-body simulations [PDF]
, 2008 In the ΛCDM cosmology, merging is one of the most important physical processes that drives the formation and evolution of galaxies. In the present work, we use N-body techniques to investigate some of currently open issues related to the formation and ...
Coppola, Giuseppina
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 +4 more
openaire +3 more sources
VLT spectroscopy of globular cluster systems:II. spectroscopic ages, metallicities, and [alpha/Fe] ratios of globular clusters in early-type galaxies [PDF]
, 2004 An analysis of ages, metallicities, and [ α/Fe] ratios of globular cluster systems in early-type galaxies is presented, based on Lick index measurements summarized in Puzia et al. (2004, A&A, 415, 123, Paper I of this series).
R. Bender +22 more
core +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 +2 more
openaire +1 more source
The Origin of the Brightest Cluster Galaxies [PDF]
The Astrophysical Journal, 1998 Most clusters and groups of galaxies contain a giant elliptical galaxy in their centres which far outshines and outweighs normal ellipticals. The origin of these brightest cluster galaxies is intimately related to the collapse and formation of the cluster. Using an N-body simulation of a cluster of galaxies in a hierarchical cosmological model, we show
openaire +2 more sources
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 +4 more
openaire +3 more sources
Constraints on the Size Evolution of Brightest Cluster Galaxies [PDF]
The Astrophysical Journal, 2002 We measure the luminosity profiles of 16 brightest cluster galaxies (BCGs) at $0.4 < z < 0.8$ using high resolution F160W NICMOS and F814W WFPC2 HST imaging. The heterogeneous sample is drawn from a variety of surveys: seven from clusters in the Einstein Medium Sensitivity Survey, five from the Las Campanas Distant Cluster Survey and its northern
Nelson, Amy E. +4 more
openaire +2 more sources