A geometrical justification for spiral galaxies rotation curves
Sign Up to like & getrecommendations! Published in 2020 at "Astrophysics and Space Science"
DOI: 10.1007/s10509-020-03769-7
Abstract: In this paper, we construct dark halo models which are merely supported by geometry of space time. We concentrate on the inhomogeneous space time around some spiral galaxies whose have dark matter. After characterizing the… read more here.
Keywords: rotation curves; justification spiral; spiral galaxies; galaxies rotation ... See more keywords
Galaxy rotation curves in the f(R, T) gravity formalism
Sign Up to like & getrecommendations! 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
Sign Up to like & getrecommendations! 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
The imprint of arms and bars on rotation curves: in-plane and off-plane
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa1677
Abstract: Within Rotation Curves (RC) is encoded the kinematical state of the stellar disc as well as information about the dynamical mechanisms driving the secular evolution of galaxies. To explain the characteristic features of RCs that… read more here.
Keywords: rotation curves; arms bars; imprint arms; bars rotation ... See more keywords
Rotation curves and dynamical masses of MaNGA barred galaxies
Sign Up to like & getrecommendations! Published in 2023 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stad1531
Abstract: In this paper we analyze a sample of 46 barred galaxies of MaNGA. Our goal is to investigate the stellar kinematics of these galaxies and obtain their rotation curves. Additionally, we aim to derive the… read more here.
Keywords: barred galaxies; maximum rotation; velocity; dynamical masses ... See more keywords
Rotation curves of galaxies and the stellar mass-to-light ratio
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty523
Abstract: Mass models of a sample of 171 low- and high-surface brightness galaxies are presented in the context of the cold dark matter (CDM) theory using the NFW dark matter halo density distribution to extract a… read more here.
Keywords: rotation curves; stellar mass; mass; mass light ... See more keywords
NIHAO – XVIII. Origin of the MOND phenomenology of galactic rotation curves in a ΛCDM universe
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz531
Abstract: The phenomenological basis for Modified Newtonian Dynamics (MOND) is the radial-acceleration-relation (RAR) between the observed acceleration, $a=V^2_{rot}(r)/r$, and the acceleration accounted for by the observed baryons (stars and cold gas), $a_{bar}=V_{bar}^2(r)/r$. We show that the… read more here.
Keywords: rotation curves; mond; nihao xviii; scatter ... See more keywords
Self-Interacting Dark Matter Can Explain Diverse Galactic Rotation Curves.
Sign Up to like & getrecommendations! Published in 2017 at "Physical review letters"
DOI: 10.1103/physrevlett.119.111102
Abstract: The rotation curves of spiral galaxies exhibit a diversity that has been difficult to understand in the cold dark matter (CDM) paradigm. We show that the self-interacting dark matter (SIDM) model provides excellent fits to… read more here.
Keywords: rotation curves; dark matter; interacting dark; self interacting ... See more keywords
Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review X"
DOI: 10.1103/physrevx.9.031020
Abstract: Galactic rotation curves exhibit diverse behavior in the inner regions, while obeying an organizing principle, i.e., they can be approximately described by a radial acceleration relation or the Modified Newtonian Dynamics phenomenology. We analyze the… read more here.
Keywords: galactic rotation; dark matter; matter; rotation curves ... See more keywords
Galaxies with Declining Rotation Curves
Sign Up to like & getrecommendations! Published in 2020 at "Astronomy Reports"
DOI: 10.1134/s1063772920050054
Abstract: Abstract A sample of 22 spiral galaxies compiled from published data is studied. The galaxy rotation curves pass through a maximum distance of more than ~1 kpc from the center with a subsequent decrease in… read more here.
Keywords: galaxies declining; halo; declining rotation; rotation ... See more keywords
Galaxy rotation curves and the deceleration parameter in weak gravity
Sign Up to like & getrecommendations! 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