Results 11 to 20 of about 957 (185)

The universal rotation curve of spiral galaxies [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2006
Abstract The observed strong dark-to-luminous matter coupling is described by a bias relation between visible and dark matter sources. We discuss the bias which emerges in the case where the topological structure of the Universe at very large distances does not properly match that of the Friedman space. With the use of such ‘topological’
Kirillov, AA, Turaev, D
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Dark matter fluid constraints from galaxy rotation curves

European Physical Journal C: Particles and Fields, 2023
Galaxy rotation curves are considered to be convincing evidence for dark matter or some dynamically equivalent alternative mechanism. Starting only from the rotation curve data, we present a model independent approach of testing a general hypothesis that
Dalibor Perković, Hrvoje Štefančić
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Galaxies with Declining Rotation Curves [PDF]

Astronomy Reports, 2020
A sample of 22 spiral galaxies compiled from published data is studied. The galaxy rotation curves pass through a maximum distance of more than $\sim 1$ kpc from the center with a subsequent decrease in the rotation velocity. The galaxy position in the Tully-Fisher (TF) and baryonic Tully-Fisher (BTF) diagrams show that the values of maximum rotation ...
Zobnina, D. I., Zasov, A. V.
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Rotation Curves of Spiral Galaxies [PDF]

Annual Review of Astronomy and Astrophysics, 2001
▪ Abstract  Rotation curves of spiral galaxies are the major tool for determining the distribution of mass in spiral galaxies. They provide fundamental information for understanding the dynamics, evolution, and formation of spiral galaxies. We describe various methods to derive rotation curves and review the results obtained.
Sofue, Yoshiaki, Rubin, Vera
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Rotation Curves of High-Luminosity Spiral Galaxies and the Rotation Curve of our Galaxy [PDF]

Symposium - International Astronomical Union, 1979
Rotation curves of high luminosity spiral galaxies are flat, to distances as great as r=49 kpc. This implies a significant mass at large r. Rotational velocities increase about 20 km/s across a spiral arm, as predicted by the density wave theory. By analogy, it is suggested that our Galaxy has a flat rotation curve out to r∼60 kpc, with V ∼ constant at
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The Effects of Inertial Forces on the Dynamics of Disk Galaxies

Galaxies, 2021
When dealing with galactic dynamics, or more specifically, with galactic rotation curves, one basic assumption is always taken: the frame of reference relative to which the rotational velocities are given is assumed to be inertial.
Roy Gomel, Tomer Zimmerman
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Influence of Magnetic Fields on the Gas Rotation in the Galaxy NGC 6946

The Astrophysical Journal, 2023
Magnetic fields can play an important role in the energy balance and formation of gas structures in galaxies. However, their dynamical effect on the rotation curve of galaxies is immensely unexplored.
M. Khademi, S. Nasiri, F. S. Tabatabaei
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The Rotation Curves of Galaxies [PDF]

Symposium - International Astronomical Union, 1975
Currently available data on rotation curves are reviewed. For curves derived from optical measurements the distribution of the ratios: the last measured point on a rotation curve to the optical radius of the galaxy has a median value of if Reference Catalogue radii are used and if Holmberg radii are used.
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Galaxy Rotation Curves in Covariant Hořava-Lifshitz Gravity

Galaxies, 2013
Using the multiplicity of solutions for the projectable case of the covariant extension of Hořava-Lifshitz gravity, we show that an appropriate choice for the auxiliary field allows for an effective description of galaxy rotation curves. This description
Jean Alexandre, Martyna Kostacinska
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Gravitational potential and galaxy rotation curves in multi-fractional spacetimes

Journal of High Energy Physics, 2022
Multi-fractional theories with integer-order derivatives are models of gravitational and matter fields living in spacetimes with variable Hausdorff and spectral dimension, originally proposed as descriptions of geometries arising in quantum gravity.
Gianluca Calcagni, Gabriele U. Varieschi
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