Results 21 to 30 of about 153,388 (301)

High-energy Neutrino Constraints on Cosmic-Ray Reacceleration in Radio Halos of Massive Galaxy Clusters

open access: yesThe Astrophysical Journal, 2023
A fraction of merging galaxy clusters host diffuse radio emission in their central region, termed a giant radio halo (GRH). The most promising mechanism of GRHs is the reacceleration of nonthermal electrons and positrons by merger-induced turbulence ...
Kosuke Nishiwaki   +2 more
doaj   +1 more source

THE CRITERIA FOR MORPHOLOGICAL CLASSIFICATION OF PF GALAXY CLUSTERS

open access: yesOdessa Astronomical Publications, 2013
The morphological types of galaxy clusters resulting from their out ward appearance is physically related to the clusters and their member galaxies. Presented here is an adopted system of morphological types of galaxy clusters based on the Zwicky, Boutz ...
E. A. Panko
doaj   +1 more source

THE ELLIPTICITIES OF GALAXIES IN GALAXY CLUSTERS OF DIFFERENT MORPHOLOGICAL TYPE

open access: yesOdessa Astronomical Publications, 2014
The distribution of galaxy ellipticities was analyzed for 207 rich PF galaxy clusters found in the Munster Red Sky Survey Galaxy Catalogue. Clusters with BM types from a comparison with the ACO catalogue were also classified on the new scheme.
E. A. Panko, P. Flin
doaj   +1 more source

Formation of Galaxy Clusters [PDF]

open access: yes, 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   +1 more source

Dark matter phenomenology of high-speed galaxy cluster collisions

open access: yesEuropean Physical Journal C: Particles and Fields, 2017
We perform a general computational analysis of possible post-collision mass distributions in high-speed galaxy cluster collisions in the presence of self-interacting dark matter.
Yuriy Mishchenko, Chueng-Ryong Ji
doaj   +1 more source

ФОРМЫ ТРЕХКОМПОНЕНТНЫХ СВЕРХСКОПЛЕНИЙ ГАЛАКТИК

open access: yesOdessa Astronomical Publications, 2011
We analyzed the shapes of galaxy superclusters, contains only 3 galaxy clusters. The superclusters were found using PF Catalogue Galaxy Clusters and Groups covering 5000 square degrees as input data.
Е. А. Панько
doaj   +1 more source

Statistics of Galaxy Clustering [PDF]

open access: yes, 2006
In this introductory talk we will establish connections between the statistical analysis of galaxy clustering in cosmology and recent work in mainstream spatial statistics. The lecture will review the methods of spatial statistics used by both sets of scholars, having in mind the cross-fertilizing purpose of the meeting series.
Martinez, Vicent J., Saar, Enn
openaire   +2 more sources

Globular clusters and galaxy formation [PDF]

open access: green, 2008
8 pages, 6 figures, Globular Clusters - Guides to Galaxies ...
Duncan A. Forbes
openalex   +5 more sources

Galaxy subgroups in galaxy clusters [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2011
Galaxies which fall into clusters as part of the same infall halo can retain correlations due to their shared origin. N-body simulations are used to study properties of such galaxy subgroups within clusters, including their richnesses and prevalence.
openaire   +3 more sources

Weak lensing by triaxial galaxy clusters [PDF]

open access: yes, 2011
Weak gravitational lensing studies of galaxy clusters often assume a spherical cluster model to simplify the analysis, but some recent studies have suggested this simplifying assumption may result in large biases in estimated cluster masses and ...
Bartelmann   +36 more
core   +1 more source

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