Results 11 to 20 of about 12,901,041 (346)
Bent It Like FRs: Extended Radio AGN in the COSMOS Field and Their Large-Scale Environment
Galaxies, 2021 A fascinating topic in radio astronomy is how to associate the complexity of observed radio structures with their environment in order to understand their interplay and the reason for the plethora of radio structures found in surveys. In this project, we
Eleni Vardoulaki +5 more
doaj +1 more source
Formation of ultra-diffuse galaxies in the field and in galaxy groups [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We study ultra-diffuse galaxies (UDGs) in zoom in cosmological simulations, seeking the origin of UDGs in the field versus galaxy groups. We find that while field UDGs arise from dwarfs in a characteristic mass range by multiple episodes of supernova ...
F. Jiang +6 more
semanticscholar +1 more source
GAMA+KiDS: Alignment of galaxies in galaxy groups and its dependence on galaxy scale [PDF]
Astronomy & Astrophysics, 2019 Intrinsic galaxy alignments are a source of bias for weak lensing measurements as well as a tool for understanding galaxy formation and evolution. In this work, we measure the alignment of shapes of satellite galaxies, in galaxy groups, with respect to ...
C. Georgiou +13 more
semanticscholar +1 more source
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
Properties of Fossil Groups of Galaxies
Universe, 2021 We review the formation and evolution of fossil groups and clusters from both the theoretical and the observational points of view. In the optical band, these systems are dominated by the light of the central galaxy.
J. Alfonso L. Aguerri, Stefano Zarattini
doaj +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
The Astrophysical Journal, 2023 We present a four-step group-finding algorithm for the Gas in Galaxy Groups (G3) initiative, a spin-off of the z ∼ 0 REsolved Spectroscopy Of a Local VolumE (RESOLVE) and Environmental COntext (ECO) surveys.
Zackary L. Hutchens +12 more
doaj +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
Physical Review D, 2018 Galaxy groups, which have hardly been looked at in MOND, afford probing the acceleration discrepancies in regions of system-parameter space that are not accessible in well-studied galactic systems, such as galaxies, galaxy clusters, and dwarf-spheroidal ...
M. Milgrom
semanticscholar +1 more source