Results 21 to 30 of about 64,819 (265)
Galaxy rotation curves. The theory [PDF]
, 2013 The non-gauge vector field with as simple as possible Lagrangian (\ref{Lagrangian}) turned out an adequate tool for macroscopic description of the main properties of dark matter. The dependence of the velocity of a star on the radius of the orbit $V\left(r\right) $ -- galaxy rotation curve -- is derived analytically from the first principles ...
B. E. Meierovich
openaire +3 more sources
Galaxy rotation curves in the Grumiller's modified gravity [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 12 pages, 3 figures, 4 ...
Lin, Hai-Nan +3 more
openaire +4 more sources
Gravitomagnetism and galaxy rotation curves: a cautionary tale [PDF]
Classical and quantum gravity, 2023 We investigate recent claims that gravitomagnetic effects in linearised general relativity can explain flat and rising rotation curves, such as those observed in galaxies, without the need for dark matter.
A. Lasenby, M. Hobson, W. Barker
semanticscholar +1 more source
Galaxy rotation curves in the f(R, T) gravity formalism [PDF]
Physica Scripta, 2022 Astronomical data have shown that the Galaxy rotation curves are mostly flat in the far distance of the galactic cores, which could reveal the insufficiency of our knowledge about how gravity works in these regimes.
Hamid Shabani, P. Moraes
semanticscholar +1 more source
Cotton gravity and 84 galaxy rotation curves [PDF]
Physical Review D, 2022 Recently, as a generalization of general relativity, a gravity theory has been proposed in which gravitational field equations are described by the Cotton tensor.
J. Harada
semanticscholar +1 more source
Galaxy rotation curves in superfluid vacuum theory [PDF]
Pramana (Bangalore), 2022 Logarithmic superfluid theory of physical vacuum suggests that gravity has a multiple-scale structure; where one can recognize sub-Newtonian, Newtonian, logarithmic, linear and quadratic (de Sitter) terms in the induced spacetime metric and effective ...
K. G. Zloshchastiev
semanticscholar +1 more source
Galaxy Rotation Curves in the µ-Deformation Based Approach to Dark Matter [PDF]
Ukrainian Journal of Physics, 2019 We elaborate further the м-deformation-based approach to the modeling of dark matter, in addition to the earlier proposed use of м-deformed thermodynamics. Herein, we construct м-deformed analogs of the Lane–Emden equation (for density profiles) and find
A. M. Gavrilik +2 more
openalex +3 more sources
A cautionary tale in fitting galaxy rotation curves with Bayesian techniques [PDF]
Astronomy & Astrophysics, 2021 The application of Bayesian techniques to astronomical data is generally non-trivial because the fitting parameters can be strongly degenerated and the formal uncertainties are themselves uncertain. An example is provided by the contradictory claims over
Pengfei Li +4 more
semanticscholar +1 more source
A first attempt to differentiate between modified gravity and modified inertia with galaxy rotation curves [PDF]
Astronomy & Astrophysics, 2020 The phenomenology of modified Newtonian dynamics (MOND) on galaxy scales may point to more fundamental theories of either modified gravity (MG) or modified inertia (MI).
Jonas Petersen, F. Lelli
semanticscholar +1 more source
Baryonic clues to the puzzling diversity of dwarf galaxy rotation curves [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We use a compilation of disc galaxy rotation curves to assess the role of the luminous component (‘baryons’) in the rotation curve diversity problem. As in earlier work, we find that rotation curve shape correlates with baryonic surface density: high ...
I. Santos-Santos +9 more
semanticscholar +1 more source