Results 31 to 40 of about 64,819 (265)
Constraints on chameleon f(R)-gravity from galaxy rotation curves of the SPARC sample [PDF]
Monthly notices of the Royal Astronomical Society, 2019 In chameleon f(R)-gravity, the fifth force will lead to ‘upturns’ in galaxy rotation curves near the screening radius. The location of the upturn depends on the cosmic background value of the scalar field $\bar{f}_\mathrm{R0}$, as well as the mass ...
A. Naik +4 more
semanticscholar +1 more source
Rotation Curve of the Galaxy [PDF]
Publications of the Astronomical Society of Japan, 1997 Reanalyzing the galactic HI survey data with two methods which make use of the geometry of the galactic disk, we explore the outer rotation curve. In addition to the derivation of the outer rotation curve, we investigate their uncertainties, which have not been established previously.
Mareki Honma, Yoshiaki Sofue
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Non-circular motions and the diversity of dwarf galaxy rotation curves [PDF]
Monthly notices of the Royal Astronomical Society, 2017 We use mock interferometric H I measurements and a conventional tilted-ring modelling procedure to estimate circular velocity curves of dwarf galaxy discs from the APOSTLE suite of Λ cold dark matter cosmological hydrodynamical simulations. The modelling
K. Oman +5 more
semanticscholar +1 more source
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
doaj +1 more source
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
openaire +4 more sources
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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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
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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
doaj +1 more source
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
openaire +1 more source
The Astronomical Journal, 2023 We report VLA B-configuration observations of the H i 21 cm line on the close disk galaxy pair NGC 5595 and NGC 5597. At the angular resolution of the observations, ∼7.″1 × 4.″2, while most of the H i 21 cm in NGC 5595 and NGC 5597 has the same extent as
J. Antonio Garcia-Barreto +1 more
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