Results 51 to 60 of about 12,793,373 (294)
Galaxy pairs in the Local Group [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2013 Abstract Current models of galaxy formation predict that galaxy pairs of comparable magnitudes should become increasingly rare with decreasing luminosity. This seems at odds with the relatively high frequency of pairings among dwarf galaxies in the Local Group. We use literature data to show that ∼30 per cent of all the satellites of the
Fattahi, Azadeh +4 more
openaire +3 more sources
Infall of galaxies onto groups [PDF]
Astronomy & Astrophysics, 2020 Context.The growth of the structure within the Universe manifests in the form of accretion flows of galaxies onto groups and clusters. Thus, the present-day properties of groups and their member galaxies are influenced by the characteristics of this continuous infall pattern.
Diego G. Lambas +5 more
openaire +4 more sources
Halo ellipticity of GAMA galaxy groups from KiDS weak lensing [PDF]
, 2016 We constrain the average halo ellipticity of ~2 600 galaxy groups from the Galaxy And Mass Assembly (GAMA) survey, using the weak gravitational lensing signal measured from the overlapping Kilo Degree Survey (KiDS).
E. V. Uitert +16 more
semanticscholar +1 more source
On the common nature of dark matter and dark energy: Galaxy groups [PDF]
The European Physical Journal Plus, 2017 .It is shown that the cosmological constant links the roots both of General Relativity and Newtonian gravity via the general function satisfying Newton’s theorem according to which the gravitating sphere acts as a point mass situated in its center.
V. Gurzadyan
semanticscholar +1 more source
Reionization of the Local Group of galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2011 We present the first detailed structure formation and radiative transfer simulations of the reionization history of our cosmic neighbourhood. To this end, we follow the formation of the Local Group of galaxies and nearby clusters by means of constrained simulations, which use the available observational constraints to construct a representation of ...
Garrelt Mellema +6 more
openaire +6 more sources
Iron in galaxy groups and clusters: confronting galaxy evolution models with a newly homogenized data set [PDF]
, 2016 We present an analysis of the iron abundance in the hot gas surrounding galaxy groups and clusters. To do this, we first compile and homogenize a large data set of 79 low-redshift (z = 0.03) systems (159 individual measurements) from the literature.
R. Yates, P. Thomas, B. Henriques
semanticscholar +1 more source
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
Galaxy And Mass Assembly: search for a population of high-entropy galaxy groups [PDF]
, 2017 Observations with the ChandraX-ray Observatory are used to examine the hot gas properties within a sample of 10 galaxy groups selected from the Galaxy And Mass Assembly survey's optical Friends-of-Friends group catalogue. Our groups have been screened to
Richard J. Pearson +9 more
semanticscholar +1 more source
A statistical study of the luminosity gap in galaxy groups
, 2010 The luminosity gap between the two brightest members of galaxy groups and clusters is thought to offer a strong test for the models of galaxy formation and evolution.
Ghanbari, Jamshid +4 more
core +1 more source
First results of the XI Groups Project: Studying an unbiased sample of galaxy groups [PDF]
, 2006 X-ray observations of hot, intergalactic gas in galaxy groups provide a useful means of characterizing the global properties of groups. However, X-ray studies of large group samples have typically involved very shallow X-ray exposures or have been based ...
Miles, Trevor A. +4 more
core +3 more sources