LAUSR

Galaxy rotation curves in the f(R, T) gravity formalism

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1 Published in 2022 at "Physica Scripta"

DOI: 10.1088/1402-4896/acd36d

Abstract: 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.… read more here.

Keywords: galaxy rotation; gravity; rotation curves; gravity formalism ... See more keywords

Galaxy rotation curves in modified gravity models

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0 Published in 2018 at "Journal of Cosmology and Astroparticle Physics"

DOI: 10.1088/1475-7516/2018/08/012

Abstract: In this work, we investigate the possibility that the galaxy rotation curves can be explained in the framework of modified gravity models that introduce a Yukawa term in the gravitational potential. We include dark matter… read more here.

Keywords: rotation curves; gravity models; modified gravity; galaxy rotation ... See more keywords

Raising galaxy rotation curves via dressing

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0 Published in 2025 at "Physical Review D"

DOI: 10.1103/m9xl-9vvk

Abstract: We present a manifestly diffeomorphism-invariant simple model of galaxy dynamics obtained by applying the Dressing Field Method (DFM) to a general-relativistic system comprising the metric and four scalar fields, phenomenologically representing the four-velocity of a… read more here.

Keywords: raising galaxy; rotation; galaxy rotation; via dressing ... See more keywords

Galaxy rotation favors prolate dark matter haloes

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1 Published in 2022 at "Physical Review D"

DOI: 10.1103/physrevd.107.083524

Abstract: The flattening rotation velocity $v(r)\to {\rm constant}$ found by Vera Rubin and collaborators and very apparent in the SPARC galaxy-rotation data coincides with Kepler's law in one less dimension. Thus, it is naturally reproduced by… read more here.

Keywords: dark matter; rotation favors; rotation; galaxy rotation ... See more keywords

Galaxy rotation curves and the deceleration parameter in weak gravity

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0 Published in 2017 at "Modern Physics Letters A"

DOI: 10.1142/s0217732317300191

Abstract: We present a theory of weak gravity parametrized by a fundamental frequency ω0 = 1 − qH of the cosmological horizon, where H and q denote the Hubble and, respectively, deceleration parameter. It predicts (i) a… read more here.

Keywords: galaxy rotation; deceleration parameter; rotation curves; weak gravity ... See more keywords