Results 11 to 20 of about 3,622,393 (232)
First Gaia dynamical model of the Milky Way disc with six phase space coordinates: a test for galaxy dynamics [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We construct the first comprehensive dynamical model for the high-quality subset of stellar kinematics of the Milky Way disc, with full 6D phase-space coordinates, provided by the Gaia Data Release 2.
M. S. Nitschai +2 more
semanticscholar +1 more source
Dynamics of Companion Galaxies of Early-type Galaxies [PDF]
The Astrophysical Journal, 2020 Abstract We estimated the dynamical masses of 115 early-type galaxies (ETGs) by analyzing the dynamics of satellite and companion galaxies of these ETGs. We selected galaxies with absolute magnitudes between −22 and −25 in the K s -band from the Extragalactic Distance Database. We
Cheng-Yu Chen, Chorng-Yuan Hwang
openaire +2 more sources
A Fresh Look at Narrow-angle Tail Radio Galaxy Dynamics, Evolution, and Emissions [PDF]
Astrophysical Journal, 2019 We present a 3D magnetohydrodynamic study of narrow-angle tail (NAT) radio galaxy (RG) dynamics, including passive cosmic ray electrons. We follow the evolution of a bipolar-jet RG in a persistent crosswind through hundreds of Myr. We confirm traditional
B. O’Neill +3 more
semanticscholar +1 more source
Dynamics of barred galaxies [PDF]
Reports on Progress in Physics, 1993 Some 30% of disc galaxies have a pronounced central bar feature in the disc plane and many more have weaker features of a similar kind. Kinematic data indicate that the bar constitutes a major non-axisymmetric component of the mass distribution and that the bar pattern tumbles rapidly about the axis normal to the disc plane.
Sellwood, J. A., Wilkinson, A.
openaire +2 more sources
Evidence for Galaxy Dynamics Tracing Background Cosmology Below the de Sitter Scale of Acceleration [PDF]
, 2017 Galaxy dynamics probe weak gravity at accelerations below the de Sitter scale of acceleration , where c is the velocity of light and H is the Hubble parameter.
M. Putten
semanticscholar +1 more source
Galaxy Zoo: Mergers – Dynamical models of interacting galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 The dynamical history of most merging galaxies is not well understood. Correlations between galaxy interaction and star formation have been found in previous studies, but require the context of the physical history of merging systems for full insight into the processes that lead to enhanced star formation.
Holincheck, Anthony J. +8 more
openaire +5 more sources
DYNAMICAL FRICTION IN CUSPY GALAXIES [PDF]
The Astrophysical Journal, 2014 In this paper we treat the problem of the dynamical friction decay of a massive object moving in an elliptical galaxy with a cuspidal inner distribution of the mass density. We present results obtained by both self-consistent, direct summation, N-body simulations, as well as by a new semi-analytical treatment of dynamical friction valid in such cuspy ...
ARCA SEDDA, MANUEL +1 more
openaire +5 more sources
Revealing the dynamical behavior of stars in a prolate or oblate elliptical galaxy
Results in Physics, 2023 We consider the motion of a test particle (star) on the meridian plane (R,z) of an elliptical galaxy with an additional central nucleus component. The shape of the elliptical galaxy can be either prolate or oblate, or even spherical by simply changing ...
Eman M. Moneer +2 more
doaj +1 more source
Self-similar galaxy dynamics below the de Sitter scale of acceleration [PDF]
, 2018 Radial accelerations α in galaxy dynamics are now observed over an extended range in redshift that includes model calculations on galactic distributions of cold dark matter (CDM) in ΛCDM.
M. Putten
semanticscholar +1 more source
DYNAMICAL FRICTION IN CUSPIDAL GALAXIES [PDF]
The Thirteenth Marcel Grossmann Meeting, 2015 Dynamical friction is the process responsible for matter transport toward the inner regions of galaxies in form of massive objects, like intermediate mass black holes, globular clusters and small satellite galaxies. While very bright galaxies show an almost flat luminosity profile in the inner region, fainter ones have, usually, a peaked, cuspidal ...
M. Arca Sedda +1 more
openaire +3 more sources