Results 31 to 40 of about 1,782 (230)
Revisiting perfect fluid dark matter: Observational constraints from our galaxy
Physics Letters B, 2016 We revisit certain features of an assumed spherically symmetric perfect fluid dark matter halo in the light of the observed data of our galaxy, the Milky Way (MW). The idea is to apply the Faber–Visser approach of combined observations of rotation curves
Alexander A. Potapov +2 more
doaj +1 more source
Light deflection angle through velocity profile of galaxies in f(R) model
European Physical Journal C: Particles and Fields, 2021 We explore a new realisation of the galactic scale dynamics via gravitational lensing phenomenon in power-law f(R) gravity theory of the type $$f(R)\propto R^{1+\delta }$$ f ( R ) ∝ R 1 + δ with ...
Vipin Kumar Sharma +2 more
doaj +1 more source
Dark Matter Dogma: A Study of 214 Galaxies
Galaxies, 2020 The aim of this paper is to test the need for non-baryonic dark matter in the context of galactic rotation and the apparent difference between distributions of galactic mass and luminosity.
Alan Sipols, Alex Pavlovich
doaj +1 more source
The Rotation Curves of Galaxies at Intermediate Redshift [PDF]
The Astrophysical Journal, 1993 We have undertaken a pilot project to measure the rotation velocities of spiral galaxies in the redshift range 0.18 < z < 0.4 using high dispersion long slit spectroscopy obtained with the Palomar 5m telescope. One field galaxy and three cluster objects known to have strong emission lines were observed over wavelength ranges covering the ...
Martha P. Haynes +3 more
openaire +4 more sources
Central Rotation Curves of Spiral Galaxies [PDF]
The Astrophysical Journal, 1999 We present high-resolution central-to-outer rotation curves for Sb, SBb, Sc, and SBc galaxies. We discuss their general characteristics, particularly their central behavior, as well as dependencies on morphological types, activity, and peculiarity. The rotation curves generally show a steep nuclear rise, and high-velocity central rotation, followed by ...
Y. Tutui +6 more
openaire +4 more sources
On the Possibility of Applying the Quasi-Isothermal Stäckel’s Model to Our Galaxy
Open Astronomy, 2015 An earlier derived quasi-isothermal Stäckel’s model of mass distribution in stellar systems and the corresponding formula for space density are applied to our Galaxy. The model rotation curve is fitted to HI kinematical data.
Gromov A. O. +2 more
doaj +1 more source
The unexpected diversity of dwarf galaxy rotation curves [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 17 pages, 6 figures, 2 tables, MNRAS ...
Oman, K.A. +11 more
openaire +8 more sources
The Astrophysical Journal, 2023 We investigate the resolved kinematics of the molecular gas, as traced by the Atacama Large Millimeter/submillimeter Array in CO (2−1), of 25 cluster member galaxies across three different clusters at a redshift of z ∼ 1.6.
W. J. Cramer +16 more
doaj +1 more source
Modeling of Spiral Structure in a Multi-Component Milky Way-Like Galaxy
Galaxies, 2021 Using recent observational data, we construct a set of multi-component equilibrium models of the disk of a Milky Way-like galaxy. The disk dynamics are studied using collisionless-gaseous numerical simulations, based on the joined integration of the ...
Sergey Khrapov +2 more
doaj +1 more source
Galaxy rotation curves via conformal factors [PDF]
The European Physical Journal C, 2018 6 two-collumn pages, 2 figures, 1 table; Major changes in v2; version to match the published one in Eur. Phys.
Ciprian A. Sporea +2 more
openaire +6 more sources