Results 21 to 30 of about 6,069 (215)
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.
Dai, Xinyu +3 more
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Scaling Properties of Galaxy Groups
Universe, 2021 Galaxy groups and poor clusters are more common than rich clusters, and host the largest fraction of matter content in the Universe. Hence, their studies are key to understand the gravitational and thermal evolution of the bulk of the cosmic matter ...
Lorenzo Lovisari +3 more
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INDIVIDUAL AND GROUP GALAXIES IN CNOC1 CLUSTERS [PDF]
The Astrophysical Journal, 2009 ApJ ...
Li, I. H., Yee, H. K. C., Ellingson, E.
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The 2dF Galaxy Redshift Survey: the clustering of galaxy groups [PDF]
Monthly Notices of the Royal Astronomical Society, 2004 16 pages.
Padilla, Nelson D. +29 more
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The cosmological constant derived via galaxy groups and clusters
European Physical Journal C: Particles and Fields, 2019 The common nature of dark matter and dark energy is argued in Gurzadyan (Eur Phys J Plus 134:14, 2019) based on the approach that the cosmological constant $$\varLambda $$ Λ enters the weak-field General Relativity following from Newton theorem on the ...
V. G. Gurzadyan, A. Stepanian
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The motions of clusters and group of galaxies
The Astrophysical Journal, 1994 25p plaintex submitted to The Astrophysical ...
Bahcall, Neta A. +2 more
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THE GALAXY CONTENT OF SDSS CLUSTERS AND GROUPS [PDF]
The Astrophysical Journal, 2009 Imaging data from the Sloan Digital Sky Survey are used to characterize the population of galaxies in groups and clusters detected with the MaxBCG algorithm. We investigate the dependence of Brightest Cluster Galaxy (BCG) luminosity, and the distributions of satellite galaxy luminosity and satellite color, on cluster properties over the redshift range ...
Hansen, Sarah M. +3 more
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Galaxies, 2021 Not all the light in galaxy groups and clusters comes from stars that are bound to galaxies. A significant fraction of it constitutes the so-called intracluster or diffuse light (ICL), a low surface brightness component of groups/clusters generally found
Emanuele Contini
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Globular Clusters around Galaxies in Groups [PDF]
Symposium - International Astronomical Union, 2002 We have obtained deep photometry of NGC 1199 (in HCG 22) and NGC 6868 (in the Telescopium group). Both galaxies are the optically brightest galaxies of their groups. Our analysis of B and R images taken with the Keck II and the VLT/ESO telescopes, detected a population of globular clusters around both galaxies, with total specific frequencies SN = 1.7 ±
Da Rocha, Martine +4 more
openaire +7 more sources
THE PECULIARITIES IN O-TYPE GALAXY CLUSTERS
Odessa Astronomical Publications, 2017 We present the results of analysis of 2D distribution of galaxies in galaxy cluster fields. The Catalogue of Galaxy Clusters and Groups PF (Panko & Flin) was used as input observational data set.
E. A. Panko, S. I. Emelyanov
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