Results 21 to 30 of about 60,837 (131)

SALT spectroscopic observations of galaxy clusters detected by ACT and a type II quasar hosted by a brightest cluster galaxy [PDF]

Monthly notices of the Royal Astronomical Society, 2014
We present Southern African Large Telescope (SALT) follow-up observations of seven massive clusters detected by the Atacama Cosmology Telescope (ACT) on the celestial equator using the Sunyaev-Zel’dovich (SZ) effect.
B. Kirk, M. Hilton, C. Cress, S. Crawford, J. Hughes, N. Battaglia, J. Bond, Claire Burke, M. Gralla, A. Hajian, M. Hasselfield, A. Hincks, L. Infante, A. Kosowsky, T. Marriage, F. Menanteau, K. Moodley, M. Niemack, J. Sievers, C. Sif'on, Susan Wilson, Edward J. Wollack, C. Zunckel   +22 more
semanticscholar   +1 more source

A non-thermal study of the brightest cluster galaxy NGC 1275 - the Gamma-Radio connection over four decades. [PDF]

, 2014
Emission from the active nucleus in the core of the brightest cluster galaxy of the Perseus cluster, NGC 1275, has varied dramatically over the past four decades.
K. Dutson, A. Edge, J. Hinton, M. Hogan, M. Gurwell, W. Alston   +5 more
semanticscholar   +1 more source

Intracluster medium cooling, AGN feedback, and brightest cluster galaxy properties of galaxy groups - Five properties where groups differ from clusters [PDF]

, 2014
Aims. We aim to investigate cool-core and non-cool-core properties of galaxy groups through X-ray data and compare them to the AGN radio output to understand the network of intracluster medium (ICM) cooling and feedback by supermassive black holes.
V. Bharadwaj, T. Reiprich, G. Schellenberger, H. Eckmiller, R. Mittal, H. Israel   +5 more
semanticscholar   +1 more source

Are Brightest Cluster Galaxies Special?

Research Notes of the AAS, 2023
A longstanding question when studying Brightest Cluster Galaxies (BCGs) and their evolution is whether their luminosities are statistical extremes of the luminosity distribution of other cluster member galaxies, or whether their luminosities follow a ...
Savannah Pobre, R. Dalal, M. Strauss, Yen-Ting Lin   +3 more
semanticscholar   +1 more source

A detection of wobbling brightest cluster galaxies within massive galaxy clusters [PDF]

, 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 ...
D. Harvey, F. Courbin, J. Kneib, J. Kneib, I. McCarthy   +4 more
semanticscholar   +1 more source

A NOVEL APPROACH TO CONSTRAIN THE MASS RATIO OF MINOR MERGERS IN ELLIPTICAL GALAXIES: APPLICATION TO NGC 4889, THE BRIGHTEST CLUSTER GALAXY IN COMA [PDF]

Astrophysical Journal, 2013
Minor mergers are thought to be important for the buildup and structural evolution of massive elliptical galaxies. In this work, we report the discovery of a system of four shell features in NGC 4889, one of the brightest members of the Coma cluster ...
M. Gu, L. Ho, C. Peng, S. E. D. O. Astronomy, S. Science, N. University, The Observatories of the Carnegie Institution for Science, Giant Magellan Telescope Organization, Key Laboratory of Optical Astronomy, Astrophysics   +9 more
semanticscholar   +1 more source

Velocity dispersion of brightest cluster galaxies in cosmological simulations [PDF]

Monthly notices of the Royal Astronomical Society, 2021
Using the DIANOGA hydrodynamical zoom-in simulation set of galaxy clusters, we analyse the dynamics traced by stars belonging to the brightest cluster galaxies (BCGs) and their surrounding diffuse component, forming the intracluster light (ICL), and ...
I. Marini, S. Borgani, A. Saro, G. Granato, C. Ragone-Figueroa, B. Sartoris, K. Dolag, G. Murante, A. Ragagnin, Y. Wang   +9 more
semanticscholar   +1 more source

A 1010 SOLAR MASS FLOW OF MOLECULAR GAS IN THE A1835 BRIGHTEST CLUSTER GALAXY [PDF]

, 2013
We report ALMA Early Science observations of the A1835 brightest cluster galaxy (BCG) in the CO (3–2) and CO (1–0) emission lines. We detect 5 × 1010 M☉ of molecular gas within 10 kpc of the BCG. Its ensemble velocity profile width of ∼130 km s−1 FWHM is
B. McNamara, H. Russell, P. Nulsen, A. Edge, N. Murray, R. Main, A. Vantyghem, F. Combes, A. Fabian, P. Salomé, C. Kirkpatrick, S. Baum, J. Bregman, M. Donahue, E. Egami, S. Hamer, C. O’Dea, J. Oonk, G. Tremblay, G. Voit   +19 more
semanticscholar   +1 more source

The HectoMAP Cluster Survey: Spectroscopically Identified Clusters and their Brightest Cluster Galaxies (BCGs) [PDF]

Astrophysical Journal, 2021
We apply a friends-of-friends (FoF) algorithm to identify galaxy clusters and we use the catalog to explore the evolutionary synergy between brightest cluster galaxies (BCGs) and their host clusters.
J. Sohn, M. Geller, H. Hwang, A. Diaferio, K. Rines, Y. Utsumi   +5 more
semanticscholar   +1 more source

MASSIVE MOLECULAR GAS FLOWS IN THE A1664 BRIGHTEST CLUSTER GALAXY [PDF]

, 2013
We report ALMA Early Science CO(1–0) and CO(3–2) observations of the brightest cluster galaxy (BCG) in A1664. The BCG contains 1.1 × 1010 M☉ of molecular gas divided roughly equally between two distinct velocity systems: one from −250 to +250 km s−1 ...
H. Russell, B. McNamara, B. McNamara, B. McNamara, A. Edge, P. Nulsen, R. Main, A. Vantyghem, F. Combes, A. C. Fabian, N. Murray, P. Salomé, R. Wilman, S. Baum, M. Donahue, C. O’Dea, J. Oonk, Grant R. Tremblay, G. Voit   +18 more
semanticscholar   +1 more source