Galactic orbital motions in the Dark Matter, MOdified Newtonian Dynamics and MOdified Gravity scenarios

Abstract

We simultaneously integrate in a numerical way the equations of motion of both the Magellanic Clouds (MCs) in MOND, MOG and CDM for -1 <= t <= +1 Gyr to see if, at least in principle, it is possible to discriminate between them (Abridged version).

LaTex2e, 11 pages, 2 tables, 8 figures. Issues concerning the masses of MCs clarified. Integration time changed to -1 Gyr <= t <= +1 Gyr. To appear in Monthly Notices of the Royal Astronomical Society (MNRAS)

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• Insight into the baryon-gravity relation in galaxies
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• Fundamental parameter-free solutions in Modified Gravity
• MOND effects in the inner solar system
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• Coincidences of Dark Energy with Dark Matter -- Clues for a Simple Alternative?
• Dynamical friction in modified Newtonian dynamics
• An Orbit Fit for the Grillmair Dionatos Cold Stellar Stream
• Vertical dynamics of disk galaxies in MOND
• Loss of mass and stability of galaxies in MOND
• The collision velocity of the bullet cluster in conventional and modified dynamics
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• Constraining the range of Yukawa gravity interaction from S2 star orbits
• Probing hybrid modified gravity by stellar motion around Galactic Centre
• Constraining Extended Gravity Models by S2 star orbits around the Galactic Centre
• Estimating the Parameters of Extended Gravity Theories with the Schwarzschild Precession of S2 Star
• High-energy scalarons in R^{2} gravity as a model for Dark Matter in galaxies
• Estimating the parameters of Hybrid Palatini gravity model with the Schwarzschild precession of S2, S38 and S55 stars: case of bulk mass distribution
• Observational Constraints on the Modified Gravity Model (MOG) Proposed by Moffat: Using the Magellanic System
• Probabilistic distributions of $M/L$ values for ultra-faint dwarf spheroidal galaxies: stochastic samplings of the IMF
• Constraining A String Gauge Field by Galaxy Rotation Curves and Perihelion Precession of Planets
• Dark matter halos modeled by polytropic spheres influenced by the relict cosmological constant and trapping polytropes forming supermassive black holes
• The Jeans theorem and the "Tolman-Oppenheimer-Volkov equation" in an exact wave solution of R^2 gravity