A volume-limited sample of X-ray galaxy groups and clusters – I. Radial entropy and cooling time profiles [PDF]
, 2013 We present the first results of our study of a sample of 101 X-ray galaxy groups and clusters, which is volume-limited in each of three X-ray luminosity bins. The aim of this work is to study the properties of the innermost ICM in the cores of our groups
E. Panagoulia, A. Fabian, J. Sanders
semanticscholar +1 more source
The 2dF Galaxy Redshift Survey: the clustering of galaxy groups [PDF]
Monthly Notices of the Royal Astronomical Society, 2004 16 pages.
Terry J. Bridges +31 more
openaire +8 more sources
THE ROLE OF POOR GALAXY CLUSTERS FOR STUDYING SUPERCLUSTER STRUCTURE
Odessa Astronomical Publications, 2008 The distribution of galaxy clusters is analyzed in regions of 6 galaxy superclusters with both measured and estimated redshifts. The positions of ACO and APM galaxy clusters in the regions are compared with the positions of galaxy clusters and groups ...
E. A. Panko
doaj +1 more source
The Effect of Age on the Grouping of Open Clusters: II—Are There Old Binary Clusters?
Universe, 2022 In the present study, we continue testing the Primordial Group hypothesis (Casado 2022), which postulates that only sufficiently young open clusters can be binary or multiple, and old clusters are essentially single.
Juan Casado
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The galaxy luminosity function in groups and clusters: the faint-end upturn and the connection to the field luminosity function [PDF]
, 2015 We characterize the luminosity functions of galaxies residing in $z\sim0$ groups and clusters over the broadest ranges of luminosity and mass reachable by the Sloan Digital Sky Survey.
Ting-Wen Lan, B. M'enard, H. Mo
semanticscholar +1 more source
The motions of clusters and group of galaxies
The Astrophysical Journal, 1994 25p plaintex submitted to The Astrophysical ...
Mirt Gramann +3 more
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Investigating the Relation between Galaxy Properties and the Gaussianity of the Velocity Distribution of Groups and Clusters [PDF]
, 2017 We investigate the dependence of stellar population properties of galaxies on group dynamical stage for a subsample of the Yang catalog. We classify groups according to their galaxy velocity distribution into Gaussian (G) and Non-Gaussian (NG). Using two
R. Carvalho +5 more
semanticscholar +1 more source
Gas in Groups and Clusters of Galaxies [PDF]
Astrophysics and Space Science, 2004 Groups and clusters contain a large fraction of hot gas which emits X-ray radiation. This gas yields information on the dynamical state and on the total mass of these systems. X-ray spectra show that heavy elements are present in the gas. As these metals must have been produced in the cluster/group galaxies and later transported into the gas, the ...
openaire +4 more sources
The similarity of the stellar mass fractions of galaxy groups and clusters [PDF]
, 2013 We employ a large sample of 20171 optically-selected groups and clusters at 0.15 < z < 0.4 in the SDSS to investigate how the stacked stellar mass fraction varies across a wide range of total mass, $M_{500}$.
J. M. Budzynski +3 more
semanticscholar +1 more source
Dynamical segregation of galaxies into groups and clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2004 We have performed a systematic analysis of the dynamics of different galaxy populations in galaxy groups from the 2dFGRS. For this purpose we have combined all the groups into a single system, where velocities v and radius r are expressed adimensionally.
Ariel G. Sánchez +2 more
openaire +3 more sources