Results 21 to 30 of about 12,793,373 (294)
MOND in galaxy groups: A superior sample [PDF]
Physical Review D, 2018 Intermediate-richness galaxy groups are an important test ground for MOND. First, they constitute a distinct type of galactic systems, with their own evolution histories and underlying physical processes; secondly, they probe little-chartered regions of ...
M. Milgrom
semanticscholar +1 more source
The Ultraviolet Detection of Diffuse Gas in Galaxy Groups [PDF]
Astrophysical Journal Supplement Series, 2018 A small survey of the UV-absorbing gas in 12 low-z galaxy groups has been conducted using the Cosmic Origins Spectrograph on board the Hubble Space Telescope.
J. Stocke +7 more
semanticscholar +1 more source
Galaxy Groups Within 3500 km s−1 [PDF]
, 2017 A study of the group properties of galaxies in our immediate neighborhood provides a singular opportunity to observationally constrain the halo mass function, a fundamental characterization of galaxy formation.
E. Kourkchi, R. Tully
semanticscholar +1 more source
Search for Dark Matter Annihilation in Galaxy Groups. [PDF]
Physical Review Letters, 2017 We use 413 weeks of publicly available Fermi Pass 8 gamma-ray data combined with recently developed galaxy group catalogs to search for evidence of dark matter annihilation in extragalactic halos.
M. Lisanti +3 more
semanticscholar +1 more source
Lost but not forgotten: Intracluster light in galaxy groups and clusters [PDF]
, 2017 With Hubble Space Telescope imaging, we investigate the progenitor population and formation mechanisms of the intracluster light (ICL) for 23 galaxy groups and clusters ranging from 3$\times10^{13} 10^{11.6}$ M$_\odot$), while by 100 kpc this colour is ...
T. DeMaio +6 more
semanticscholar +1 more source
Direct evidence of hierarchical assembly at low masses from isolated dwarf galaxy groups [PDF]
Nature Astronomy, 2017 The demographics of dwarf galaxy populations have long been in tension with predictions from the Λ cold dark matter (ΛCDM) paradigm1–4. If primordial density fluctuations were scale-free as predicted, dwarf galaxies should themselves host dark-matter ...
S. Stierwalt +7 more
semanticscholar +1 more source
Environmental Dependence of the Mass–Metallicity Relation in Cosmological Hydrodynamical Simulations
The Astrophysical Journal, 2023 We investigate the environmental dependence of the gas-phase metallicity for galaxies at z = 0 to z ≳ 2 and the underlying physical mechanisms driving this dependence using state-of-the-art cosmological hydrodynamical simulations.
Kai Wang, Xin Wang, Yangyao Chen
doaj +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
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 ...
openaire +4 more sources
Galaxy groups in the low-redshift Universe [PDF]
, 2017 We apply a halo-based group finder to four large redshift surveys, the 2MRS, 6dFGS, SDSS and 2dFGRS, to construct group catalogs in the low-redshift Universe. The group finder is based on that of Yang et al.
Seunghwan Lim +4 more
semanticscholar +1 more source