Results 41 to 50 of about 887 (163)

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.
Tod R. Lauer, Marc Postman, Barbara S. Ryden   +2 more
openaire   +2 more sources

Stellar populations in brightest cluster galaxies [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractWe present the results of an investigation of a large sample of brightest cluster galaxies (BCGs), their kinematic and stellar population properties and the relationships between these and the properties of the host clusters. We have obtained high signal-to-noise, long-slit spectra of 49 BCGs in the nearby Universe with the Gemini and WHT ...
Loubser, S, Sanchez-Blazquez, P, Soechting, I, Sansom, A   +3 more
openaire   +1 more source

Evidence for AGN-regulated Cooling in Clusters at z ∼ 1.4: A Multiwavelength View of SPT-CL J0607-4448

The Astrophysical Journal, 2023
We present a multiwavelength analysis of the galaxy cluster SPT-CL J0607-4448 (SPT0607), which is one of the most distant clusters discovered by the South Pole Telescope at z = 1.4010 ± 0.0028. The high-redshift cluster shows clear signs of being relaxed
Megan Masterson, Michael McDonald, Behzad Ansarinejad, Matthew Bayliss, Bradford A. Benson, Lindsey E. Bleem, Michael S. Calzadilla, Alastair C. Edge, Benjamin Floyd, Keunho J. Kim, Gourav Khullar, Taweewat Somboonpanyakul   +11 more
doaj   +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   +5 more sources

How special are brightest group and cluster galaxies? [PDF]

Monthly Notices of the Royal Astronomical Society, 2007
Abstract We use the Sloan Digital Sky Survey (SDSS) to construct a sample of 625 brightest group and cluster galaxies (BCGs) together with control samples of non-BCGs matched in stellar mass, redshift and colour. We investigate how the systematic properties of BCGs depend on stellar mass and on their privileged location near the cluster ...
von der Linden, Anja, Best, Philip N., Kauffmann, Guinevere, White, Simon D. M.   +3 more
openaire   +4 more sources

Understanding shape and centroid deviations in 39 strong lensing galaxy clusters in various dynamical states [PDF]

EPJ Web of Conferences
Through observational tests of strong lensing galaxy clusters, we can test simulation derived structure predictions that follow from Λ Cold Dark Matter (ΛCDM) cosmology.
Gassis Raven, Bayliss Matthew B., Sharon Keren, Mahler Guillaume, Gladders Michael D., Dahle Håkon, Florian Michael K., Rigby Jane R., McDonald Michael, Elicker Lauren, Owens M. Riley   +10 more
doaj   +1 more source

An Infrared Survey of Brightest Cluster Galaxies. II. Why are Some Brightest Cluster Galaxies Forming Stars? [PDF]

The Astrophysical Journal, 2008
Quillen et al.(2007) presented an imaging survey with the {\it Spitzer Space Telescope} of 62 brightest cluster galaxies with optical line emission located in the cores of X-ray luminous clusters. They found that at least half of these sources have signs of excess infrared emission. Here we discuss the nature of the IR emission and its implications for
O'Dea, C.P., Baum, S.A., Privon, G., Noel-Storr, J., Quillen, A.C., Zufelt, N., Park, J., Edge, A., Russell, H., Fabian, A.C., Donahue, M., Sarazin, C.L., McNamara, B., Bregman, J.N., Egami, E.   +14 more
openaire   +5 more sources

The Formation of the Brightest Cluster Galaxy and Intracluster Light in Cosmological N-body Simulations with the Galaxy Replacement Technique

The Astrophysical Journal, 2023
We investigate the formation channels of the intracluster light (ICL) and the brightest cluster galaxy (BCG) in clusters at z = 0. For this, we perform multi-resolution cosmological N -body simulations using the “galaxy replacement technique.” We study ...
Kyungwon Chun, Jihye Shin, Rory Smith, Jongwan Ko, Jaewon Yoo   +4 more
doaj   +1 more source

Dynamics and Shape of Brightest Cluster Galaxies [PDF]

, 2007
2 pages, 2 figures, Proc. ESO Workshop "Groups of galaxies in the nearby Universe", Santiago, Chile, 5-9 Dec. 2005, ESO Astrophysics Symposia, eds. I. Saviane, V. Ivanov & J.
Karla Alamo-Martínez, Erik Tago, Roger Coziol, Heinz Andernach   +3 more
openaire   +4 more sources

THE DYNAMICAL STATE OF BRIGHTEST CLUSTER GALAXIES AND THE FORMATION OF CLUSTERS [PDF]

The Astronomical Journal, 2009
114 pages, 9 figures, full version of tables 1 and 2; accepted to appear in ...
Roger Coziol, Erik Tago, Karla Alamo-Martínez, Heinz Andernach, César A. Caretta   +4 more
openaire   +3 more sources