Results 31 to 40 of about 2,697,066 (301)
Erratum: The XMM Large-Scale Structure survey: an initial sample of galaxy groups and clusters to a redshift z < 0.6 [PDF]
, 2005 We present X-ray and optical spectroscopic observations of 12 galaxy groups and clusters identified within the X-ray Multi-Mirror (XMM) Large-Scale Structure (LSS) survey.
J. P. Willis +16 more
openalex +3 more sources
, 1990 The Einstein imaging proportional counter observations of the poor cluster of galaxies centered on the radio galaxy Hydra A are examined. From the surface brightness profile, it is found that the X-ray-emitting gas in the Hydra A cluster must be ...
L. P. David +3 more
openalex +2 more sources
ON THE BARYON FRACTIONS IN CLUSTERS AND GROUPS OF GALAXIES [PDF]
The Astrophysical Journal, 2010 We present the baryon fractions of 2MASS groups and clusters as a function of cluster richness using total and gas masses measured from stacked ROSAT X-ray data and stellar masses estimated from the infrared galaxy catalogs. We detect X-ray emission even in the outskirts of clusters, beyond r_200 for richness classes with X-ray temperatures above 1 keV.
Xinyu Dai +3 more
openalex +5 more sources
LoCuSS: Pre-processing in galaxy groups falling into massive galaxy clusters at z=0.2 [PDF]
, 2017 We report direct evidence of pre-processing of the galaxies residing in galaxy groups falling into galaxy clusters drawn from the Local Cluster Substructure Survey (LoCuSS). 34 groups have been identified via their X-ray emission in the infall regions of 23 massive ($\rm \langle M_{200}\rangle = 10^{15}\,M_{\odot}$) clusters at $0.15
M. Bianconi +5 more
arxiv +3 more sources
The cosmological free-free signal from galaxy groups and clusters [PDF]
, 2010 Using analytical models and cosmological N-body simulations, we study the free-free radio emission from ionized gas in clusters and groups of galaxies. The results obtained with the simulations are compared with analytical predictions based on the mass ...
Ascasibar +59 more
core +5 more sources
Missing Baryons, from Clusters to Groups of Galaxies [PDF]
The Astrophysical Journal, 2007 From clusters to groups of galaxies, the powerful bremsstrahlung radiation L_X emitted in X rays by the intracluster plasma is observed to decline sharply with lowering virial temperatures T (i.e., at shallower depths of the gravitational wells) after a steep local L_X-T correlation; this implies increasing scarcity of diffuse baryons relative to dark ...
A. Cavaliere, A. Lapi
openalex +6 more sources
Galaxy evolution in groups and clusters: star formation rates, red sequence fractions and the persistent bimodality [PDF]
, 2012 Using galaxy group/cluster catalogues created from the Sloan Digital Sky Survey Data Release 7, we examine in detail the specific star formation rate (SSFR) distribution of satellite galaxies and its dependence on stellar mass, host halo mass and halo ...
Andrew Wetzel +2 more
openalex +3 more sources
The Large-Scale Environment of Groups & Clusters of Galaxies [PDF]
Proceedings of the International Astronomical Union, 2004 It appears that the dynamical status of clusters and groups of galaxies is related to the large-scale structure of the Universe. A few interesting trends have been established: (1) The Cluster Substructure - Alignment Connection, by which clusters show a strong correlation between their tendency to be aligned with their neighbors and their dynamical ...
arxiv +5 more sources
Revisiting the Cooling Flow Problem in Galaxies, Groups, and Clusters of Galaxies [PDF]
The Astrophysical Journal, 2018 We present a study of 107 galaxies, groups, and clusters spanning ∼3 orders of magnitude in mass, ∼5 orders of magnitude in central galaxy star formation rate (SFR), ∼4 orders of magnitude in the classical cooling rate ( ) of the intracluster medium (ICM)
M. McDonald +3 more
semanticscholar +7 more sources
Accretion of galaxy groups into galaxy clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT We study the role of group infall in the assembly and dynamics of galaxy clusters in ΛCDM. We select 10 clusters with virial mass M200 ∼ 1014 $\rm M_\odot$ from the cosmological hydrodynamical simulation Illustris and follow their galaxies with stellar mass M⋆ ≥ 1.5 × 108 $\rm M_\odot$.
Laura V. Sales +3 more
openaire +4 more sources