Results 1 to 10 of about 150,051 (304)

Structures in Galaxy Clusters [PDF]

open access: yesThe Astrophysical Journal, 1993
The analysis of the presence of substructures in 16 well-sampled clusters of galaxies suggests a stimulating hypothesis: Clusters could be classified as unimodal or bimodal, on the basis of to the sub-clump distribution in the {\em 3-D} space of ...
Biviano, A.   +6 more
core   +6 more sources

Formation of Galaxy Clusters [PDF]

open access: yesAnnual Review of Astronomy and Astrophysics, 2012
In this review, we describe our current understanding of cluster formation: from the general picture of collapse from initial density fluctuations in an expanding Universe to detailed simulations of cluster formation including the effects of galaxy ...
Andrey V. Kravtsov   +24 more
core   +6 more sources

On the Alignment of Galaxies in Clusters [PDF]

open access: yesAstrophysics, 2020
9 paginas,1 figure, and 7 tables. Accepted in Astrophysics.
Juan Pablo Torres-Papaqui   +1 more
openaire   +5 more sources

THE ORIENTATION OF GALAXIES IN GALAXY CLUSTERS [PDF]

open access: yesThe Astrophysical Journal, 2010
We present an analysis of the spatial orientations of galaxies in the 247 optically selected rich Abell clusters, having in the considered area at least 100 members. We investigated the relation between angles giving information about galaxy angular momenta and the number of members in each structure.
Piotr Flin   +3 more
openaire   +3 more sources

Clusters of Galaxies [PDF]

open access: yesHighlights of Astronomy, 1977
AbstractClusters and groups of galaxies contain the majority of galaxies in the universe. The rich clusters, while less numerous than the many poor groups, are the densest and largest systems known, and can be easily recognized and studied even at relatively large distances.
openaire   +5 more sources

Alignment of galaxies and clusters [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2008
We investigated the influence of environment on cluster galaxies by examining the alignment of the brightest cluster galaxy (BCG) position angle with respect to the host cluster X-ray position angle. The cluster position angles were measured using high spatial resolution X-ray data taken from the Chandra ACIS archive, that significantly improved the ...
Boehringer, Hans   +5 more
openaire   +4 more sources

Accretion of galaxy groups into galaxy clusters [PDF]

open access: yesMonthly 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

THE ROLE OF POOR GALAXY CLUSTERS FOR STUDYING SUPERCLUSTER STRUCTURE

open access: yesOdessa 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 Halo Mass–Temperature Relation for Clusters, Groups, and Galaxies

open access: yesThe Astrophysical Journal, 2023
The halo mass–temperature ( M – T ) relation for a sample of 216 galaxy clusters, groups, and individual galaxies observed by the Chandra X-ray Observatory is presented.
Iurii V. Babyk, Brian R. McNamara
doaj   +1 more source

THE ASSEMBLY OF GALAXY CLUSTERS [PDF]

open access: yesThe Astrophysical Journal, 2008
We study the formation of fifty-three galaxy cluster-size dark matter halos formed within a pair of cosmological LCDM N-body simulations, and track the accretion histories of cluster subhalos with masses large enough to host 0.1L* galaxies. By associating subhalos with cluster galaxies, we find the majority of galaxies in clusters experience no pre ...
Berrier, Joel C.   +5 more
openaire   +5 more sources

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