Results 11 to 20 of about 12,793,373 (294)
Feedback from Active Galactic Nuclei in Galaxy Groups [PDF]
Universe, 2021 The co-evolution between supermassive black holes and their environment is most directly traced by the hot atmospheres of dark matter halos. The cooling of the hot atmosphere supplies the central regions with fresh gas, igniting active galactic nuclei ...
Dominique Eckert +4 more
doaj +2 more sources
Galaxy-galaxy weak-lensing measurement from SDSS: II. host halo properties of galaxy groups [PDF]
Astrophysical Journal, 2017 As the second paper of a series on studying galaxy-galaxy lensing signals using the Sloan Digital Sky Survey Data Release 7 (SDSS DR7), we present our measurement and modelling of the lensing signals around groups of galaxies.
Fu, Liping +12 more
core +4 more sources
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 satellites of galaxies.
M. Milgrom
openaire +5 more sources
The Astronomical Journal, 2015 Galaxy groups can be characterized by the radius of decoupling from cosmic expansion, the radius of the caustic of second turnaround, and the velocity dispersion of galaxies within this latter radius. These parameters can be a challenge to measure, especially for small groups with few members.
R. Brent Tully
openaire +4 more sources
Evolution of galaxy groups in the Illustris simulation [PDF]
, 2016 We present the first study of evolution of galaxy groups in the Illustris simulation. We focus on dynamically relaxed and unrelaxed galaxy groups representing dynamically evolved and evolving galaxy systems, respectively.
Dariush, Ali A. +2 more
core +3 more sources
Quantifying the role of ram pressure stripping of galaxies within galaxy groups [PDF]
Monthly notices of the Royal Astronomical Society, 2022 It is often stated that the removal of gas by ram pressure stripping of a galaxy disk is not a common process in galaxy groups. In this study, with the aid of an observational classification of galaxies and a simple physical model, we show that this ...
Tutku Kolcu +3 more
semanticscholar +1 more source
The Resolved Sunyaev–Zel’dovich Profiles of Nearby Galaxy Groups [PDF]
, 2021 Many of the baryons in galaxy groups are thought to have been driven out to large distances (≳R 500) by feedback, but there are few constraining observations of this extended gas.
Cameron T. Pratt, Zhijie Qu, J. Bregman
semanticscholar +1 more source
Hunting for the host galaxy groups of binary black holes and the application in constraining Hubble constant [PDF]
, 2020 The discovery of gravitational-wave (GW) signals, produced by the coalescence of stellar-mass binary black holes (SBBHs), opens a new window to study the astrophysical origins and dynamical evolutions of compact binaries. In addition, these GW events can
Jiming Yu, Yu Wang, Wen Zhao, Youjun Lu
semanticscholar +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