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Compact Groups Of Galaxies [PDF]
Symposium - International Astronomical Union, 1997 This paper reviews some of the outstanding questions concerning compact groups of galaxies. These relate to the physical nature and dynamical status of the groups, their formation and evolution, and their role in galaxy evolution. The picture that emerges is that compact groups are generally physically dense systems, although often contaminated by ...
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Universe, 2021 Galaxy groups are more than an intermediate scale between clusters and halos hosting individual galaxies, they are crucial laboratories capable of testing a range of astrophysics from how galaxies form and evolve to large scale structure (LSS) statistics
Benjamin D. Oppenheimer +4 more
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Detection of Missing Baryons in Galaxy Groups with Kinetic Sunyaev–Zel’dovich Effect [PDF]
Astrophysical Journal, 2017 We present the detection of the kinetic Sunyaev–Zel’dovich effect (kSZE) signals from groups of galaxies as a function of halo mass down to using the Planck cosmic microwave background maps and stacking about 40,000 galaxy systems with known positions ...
Seunghwan Lim +3 more
semanticscholar +1 more source
A KiDS weak lensing analysis of assembly bias in GAMA galaxy groups [PDF]
, 2017 We investigate possible signatures of halo assembly bias for spectroscopically selected galaxy groups from the Galaxy And Mass Assembly (GAMA) survey using weak lensing measurements from the spatially overlapping regions of the deeper, high-imaging ...
A. Dvornik +21 more
semanticscholar +1 more source
Highlights of Astronomy, 1977 I would like to report on some work that Ed Turner and I have done on groups of galaxies and how groups may be used to obtain useful cosmological information. Of course the classic study of groups of galaxies was done by de Vaucouleurs (1975) who made a catalogue of groups and loose associations of galaxies in the local supercluster. Partly to obtain a
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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
M. Bianconi +5 more
semanticscholar +1 more source
The Astrophysical Journal, 1993 The shape of groups of galaxies has been since now a disregarded topic in the literature, mainly due to the fact that individual ellipticity estimates of poor systems are strongly biased toward higher values. Such a bias turns out to depend on both the ellipticity itself and on the richness of the group. In this paper we have devised a modified version
G. Fasano +3 more
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The Astrophysical Journal, 2023 We investigate the fraction of quenched satellite galaxies in host galaxy groups and clusters using TNG300 in the IllustrisTNG cosmological magnetohydrodynamical simulations.
So-Myoung Park +7 more
doaj +1 more source
Gas Contents of Galaxy Groups from Thermal Sunyaev–Zel’dovich Effects [PDF]
, 2017 A matched filter technique is applied to the Planck all-sky Compton y-parameter map to measure the thermal Sunyaev–Zel’dovich (tSZ) effect produced by galaxy groups of different halo masses selected from large redshift surveys in the low-z universe ...
Seunghwan Lim +6 more
semanticscholar +1 more source
The galaxy environment in GAMA G3C groups using the Kilo Degree Survey Data Release 3 [PDF]
, 2018 We aim to investigate the galaxy environment in GAMA Galaxy Groups Catalogue (G3C) using a volume-limited galaxy sample from the Kilo Degree Survey Data Release 3.
Bilicki, M. +15 more
core +5 more sources