Results 101 to 110 of about 3,622,393 (232)
Constraining f(R) gravity with PLANCK data on galaxy cluster profiles
, 2014 Models of $f(R)$ gravity that introduce corrections to the Newtonian potential in the weak field limit are tested at the scale of galaxy clusters. These models can explain the dynamics of spiral and elliptical galaxies without resorting to dark matter ...
Atrio-Barandela, F. +3 more
core +1 more source
Kinematic and Dynamics of the Galaxy ESO 358-60
The Astrophysical JournalWe investigate the velocity field derived from H I measurements of the irregular galaxy ESO 358-60 using the velocity ring model (VRM) method. This technique, which assumes a coplanar disk, allows us to reconstruct coarse-grained maps of both radial and ...
Francesco Sylos Labini +1 more
doaj +1 more source
Visit Nearby Halo Substructures Using LAMOST DR9 MRS Data
The Astrophysical JournalBased on the LAMOST DR9 Medium Resolution Spectra (MRS) catalog, combined with astrometries from Gaia DR3, we conducted an investigation into the substructures in the stellar halo to obtain their chemical and kinematic information.
Xin-Zhe Tang +5 more
doaj +1 more source
Dynamical Regularities in Galaxies
, 2019 Galaxies are observed to obey a strict set of dynamical scaling relations. We review these relations for rotationally supported disk galaxies spanning many decades in mass, surface brightness, and gas content. The behavior of these widely varied systems can be summarized with a handful of empirical laws connected by a common acceleration scale.
McGaugh, Stacy +3 more
openaire +2 more sources
Dynamical Evolution of Barred Galaxies
Celestial Mechanics and Dynamical Astronomy, 2005 24 pages, 11 figures, invited review, 2004 DDA meeting in Cannes, april 19-23, Celestial Mechanics & Dynamical Astronomy (in press)
openaire +4 more sources
The Astrophysical Journal Supplement SeriesWe derive circular velocity curves (CVCs) from stellar dynamical models for ∼6000 nearby galaxies in the final data release of the Sloan Digital Sky Survey-IV MaNGA survey with integral-field spectroscopy, exploring connections between the inner ...
Kai Zhu +8 more
doaj +1 more source
A vertically orientated dark matter halo marks a flip of the Galactic disc
Astronomy & AstrophysicsUnveiling the 3D shape of the Milky Way’s dark-matter halo is critical to understanding its formation history. We created an innovative dynamical model that makes minimal assumptions about the internal dynamical structures and accommodates a highly ...
Zhu Ling +7 more
doaj +1 more source
Dynamics of the Galaxy's Satellites
, 2000 7 pages to appear in 'Star2000 -- Dynamics of Star Clusters and the Milky Way' eds R. Spurzem & R.
openaire +4 more sources
EMPRESS. XII. Statistics on the Dynamics and Gas Mass Fraction of Extremely Metal-poor Galaxies
The Astrophysical JournalWe present the demography of the dynamics and gas mass fraction of 33 extremely metal-poor galaxies (EMPGs) with metallicities of 0.015–0.195 Z _⊙ and low stellar masses of 10 ^4 –10 ^8 M _⊙ in the local universe.
Yi Xu +51 more
doaj +1 more source
Dynamical friction of radio galaxies in galaxy clusters [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2008 Abstract The distribution of luminous radio galaxies in galaxy clusters has been observed to be concentrated in the inner region. We consider the role of dynamical friction of massive galaxies (M∼ 1012.5M⊙), assuming them to be hosts of luminous radio galaxies, and show that beginning with a Navarro–Frenk–White density profile of a ...
openaire +2 more sources