THE EFFECT OF ENVIRONMENT ON THE FORMATION OF Hα FILAMENTS AND COOL CORES IN GALAXY GROUPS AND CLUSTERS [PDF]
, 2011 We present the results of a combined X-ray and Hα study of 10 galaxy groups and 17 galaxy clusters using the Chandra X-ray Observatory and the Maryland Magellan Tunable Filter.
M. McDonald, S. Veilleux, R. Mushotzky
semanticscholar +1 more source
Velocity-dependent self-interacting dark matter from groups and clusters of galaxies [PDF]
Journal of Cosmology and Astroparticle Physics, 2020 We probe the self-interactions of dark matter with relaxed galaxy groups and clusters using observational data from strong and weak lensing and stellar kinematics.
L. Sagunski +4 more
semanticscholar +1 more source
Cluster detection from surface-brightness fluctuations in SDSS data [PDF]
, 2001 Galaxy clusters can be detected as surface brightness enhancements in smoothed optical surveys. This method does not require individual galaxies to be identifiable, and enables clusters to be detected out to surprisingly high redshifts, as recently ...
Aragón-Salamanca +24 more
core +2 more sources
Galaxy structures — groups, clusters and superclusters [PDF]
International Journal of Geometric Methods in Modern Physics, 2014 We provide a brief summary of the history of galaxy structure studies. We also introduce several large-scale redshift surveys and summarize the most commonly used methods to identify the groups and clusters of galaxies. We present several catalogs of galaxy groups. These catalogs can be used to study the galaxy groups in different environments.
Tiit Sepp, Tiit Sepp, Mirt Gramann
openaire +3 more sources
Triggering of merger‐induced starbursts by the tidal field of galaxy groups and clusters [PDF]
, 2007 Star formation in galaxies is for a part driven by galaxy mergers. At low redshift, star formation activity is low in high-density environments like groups and clusters, and the star formation activity of galaxies increases with their isolation.
M. Martig, F. Bournaud
semanticscholar +1 more source
The radial distribution of galaxies in groups and clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 We present a new catalogue of 55,121 groups and clusters centred on Luminous Red Galaxies from SDSS DR7 in the redshift range 0.15~2.6) that is approximately a factor of two lower than that of the dark matter (as predicted by N-body cosmological simulations) and nearly independent of halo mass. Interestingly, in spite of the difference in shape between
Ian G. McCarthy +6 more
openaire +5 more sources
Entropy Evolution in Galaxy Groups and Clusters: a Comparison of External and Internal Heating [PDF]
, 2001 The entropy in hot, X-ray-emitting gas in galaxy groups and clusters is a measure of past heating events, except for the entropy lost by radiation from denser regions.
F. Brighenti, W. Mathews
semanticscholar +1 more source
MORPHOLOGICAL TYPES OF 254 RICH PF GALAXY CLUSTERS
Odessa Astronomical Publications, 2014 We determined the morphological types for 254 rich galaxy clusters from the PF Catalogue of Galaxy Clusters and Groups. The data set contains the PF galaxy clusters, which have no ACO coinciding ones.
E. A. Panko +2 more
doaj +1 more source
The Environment of ``E+A'' Galaxies [PDF]
, 1995 The violent star formation history of ``E+A'' galaxies and their detection almost exclusively in distant clusters is frequently used to link them to the ``Butcher-Oemler effect'' and to argue that cluster environment influences galaxy evolution.
Hashimoto, Y. +7 more
core +2 more sources
HEATING THE HOT ATMOSPHERES OF GALAXY GROUPS AND CLUSTERS WITH CAVITIES: THE RELATIONSHIP BETWEEN JET POWER AND LOW-FREQUENCY RADIO EMISSION [PDF]
, 2011 We present scaling relations between jet power and radio power measured using the Giant Metrewave Radio Telescope (GMRT), Chandra, and XMM-Newton, for a sample of nine galaxy groups combined with the Bîrzan et al. sample of clusters. Cavity power is used
E. O’Sullivan +6 more
semanticscholar +1 more source