Results 41 to 50 of about 2,129 (213)
Testing universal dark-matter caustic rings with galactic rotation curves
Physics Letters B, 2023 Infall of cold dark matter on a galaxy may result in caustic rings where the particle density is enhanced. They may be searched for as features in the galactic rotation curves.
Daniil Davydov, Sergey Troitsky
doaj +1 more source
Uncorrelated velocity and size residuals across galaxy rotation curves [PDF]
, 2019 The mass–velocity–size relation of late-type galaxies decouples into independent correlations between mass and velocity (the Tully–Fisher relation), and between mass and size.
McGaugh, S +3 more
core +2 more sources
Galactic rotation dynamics in a new $$f({\mathcal {R}})$$ f ( R ) gravity model
European Physical Journal C: Particles and Fields, 2023 We propose to test the viability of the recently introduced $$f(\mathcal {R})$$ f ( R ) gravity model in the galactic scales. For this purpose we consider test particles moving in stable circular orbits around the galactic center.
Nashiba Parbin, Umananda Dev Goswami
doaj +1 more source
On the Keplerian Rotation Curves of Galaxies [PDF]
Publications of the Astronomical Society of Japan, 1997 We propose a criterion for examining whether or not the uncertainty of the outer rotation curves is sufficiently small to distinguish a Keplerian rotation curve from flat ones. We have applied this criterion to both Keplerian and non-Keplerian rotation curves so far obtained, and investigated their relative fraction.
Honma, Mareki, Sofue, Yoshiaki
openaire +2 more sources
High-Resolution Rotation Curves and Galaxy Mass Models from Things [PDF]
, 2016 We present rotation curves of 19 galaxies from The H I Nearby Galaxy Survey (THINGS). The high spatial and velocity resolution of THINGS make these the highest quality H I rotation curves available to date for a large sample of nearby galaxies, spanning ...
Kennicutt, Robert C +5 more
core +1 more source
A Cautionary Tale in Fitting Galaxy Rotation Curves with Bayesian Techniques: Does Newton\u27s Constant Vary from Galaxy to Galaxy? [PDF]
, 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
McGaugh, Stacy, Li, Pengfei
core +2 more sources
Rotation curve of our Galaxy and field galaxies [PDF]
Symposium - International Astronomical Union, 2004 We present a database of galaxies rotation curve (from Hα observations), including our Galaxy.
D. Russeil +3 more
openaire +1 more source
Conformally-rescaled Schwarzschild metrics do not predict flat galaxy rotation curves
European Physical Journal C: Particles and Fields, 2022 For conformally invariant gravity theories defined on Riemannian spacetime and having the Schwarzschild–de-Sitter (SdS) metric as a solution in the Einstein gauge, we consider whether one may conformally rescale this solution to obtain flat rotation ...
Michael Hobson, Anthony Lasenby
doaj +1 more source
Galaxy rotation curves and preferred reference frame effects
European Physical Journal C: Particles and Fields, 2019 As an alternative to dark matter models we use generalized Jordan–Brans–Dicke scalar–vector–tensor (JBD-SVT) gravity model to study the behavior of the rotational velocities of test particles moving around galaxies.
Hossein Ghaffarnejad, Razieh Dehghani
doaj +1 more source
The universal rotation curve of dwarf disc galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 We use the concept of the spiral rotation curves universality to investigate the luminous and dark matter properties of the dwarf disc galaxies in the local volume (size $\sim11$ Mpc). Our sample includes 36 objects with rotation curves carefully selected from the literature.
Karukes E. V., Salucci P.
openaire +4 more sources