Galaxy Rotation Curves Disfavor Traditional and Self-interacting Dark Matter Halos, Preferring a Disk Component or Einasto Function [PDF]
Astrophysical Journal Letters, 2021 We use the galaxy rotation curves in the SPARC database to compare nine different dark matter (DM) and modified gravity models on an equal footing, paying special attention to the stellar mass-to-light ratios. We compare three noninteracting DM models: a
Nicolas Loizeau, G. Farrar
semanticscholar +3 more sources
Elongated Gravity Sources as an Analytical Limit for Flat Galaxy Rotation Curves [PDF]
Universe, 2021 The flattening of spiral-galaxy rotation curves is unnatural in view of the expectations from Kepler’s third law and a central mass. It is interesting, however, that the radius-independence velocity is what one expects in one less dimension. In our three-
Felipe J. Llanes-Estrada
doaj +2 more sources
Testing CCC+TL Cosmology with Galaxy Rotation Curves
GalaxiesThis paper aims to explore whether astrophysical observations, primarily galaxy rotation curves, result from covarying coupling constants (CCC) rather than from dark matter.
Rajendra P. Gupta
doaj +2 more sources
Galaxy Rotation Curves without Nonbaryonic Dark Matter [PDF]
The Astrophysical Journal, 2006 43 pages, 7 figures, 4 tables, 101 galaxies. Submitted to ApJ, June 20, 2005. Accepted for publication in ApJ, September 21, 2005. To be published in ApJ 636 (January 10, 2006)
Brownstein, J. R., Moffat, J. W.
openaire +4 more sources
Testing the Strong Equivalence Principle. II. Relating the External Field Effect in Galaxy Rotation Curves to the Large-scale Structure of the Universe [PDF]
Astrophysical Journal, 2021 Theories of modified gravity generically violate the strong equivalence principle, so that the internal dynamics of a self-gravitating system in freefall depends on the strength of the external gravitational field (the external field effect).
Kyu‐Hyun Chae +4 more
openalex +3 more sources
A Simple Model for Explaining Galaxy Rotation Curves [PDF]
Galaxies, 2018 A new simple expression for the circular velocity of spiral galaxies is proposed and tested against HI Nearby Galaxy Survey (THINGS) data set. Its accuracy is compared with the one coming from MOND.
Aneta Wojnar +2 more
doaj +2 more sources
Galaxy Rotation Curves in Covariant Hořava-Lifshitz Gravity [PDF]
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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The Discrepancy in Galaxy Rotation Curves
, 2019 In this work we try a new approach for dealing with the discrepancy between observed galaxy rotation curves and theoretical predictions. This new approach does not involve any changes in the current fundamental laws of nature or the addition of dark halos.
Gomel, Roy, Zimmerman, Tomer
openaire +3 more sources
Reply to: Overconfidence in Bayesian analyses of galaxy rotation curves [PDF]
, 2020 Cameron {\it et al.}~2019 (hereafter C19) recommends a more cautious and rigorous approach to statistical analysis in astronomy. We welcome this particular side of their communication as it helps stimulating the effort towards the adoption of better ...
Davi C. Rodrigues +3 more
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Galaxy rotation curves and nonextensive statistics [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 We investigate the influence of the nonextensive q-statistics and kinetic theory on galactic scales through the analysis of a devised sample of Spiral Rotation Curves. Largely supported by recent developments on the foundations of statistical mechanics and a plethora of astrophysical applications, the theory also provides an alternative interpretation ...
C. Frigerio Martins +2 more
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