Escaping from MOND

Abstract

We present a new test of modified Newtonian dynamics (MOND) on galactic scales, based on the escape speed in the solar neighbourhood. This test is independent from other empirical successes of MOND at reproducing the phenomenology of galactic rotation curves. The galactic escape speed in MOND is entirely determined by the baryonic content of the Galaxy and the external field in which it is embedded. We estimate that the external field in which the Milky Way must be embedded to produce the observed local escape speed of 550 km/s is of the order of a_0/100, where a_0 is the dividing acceleration scale below which gravity is boosted in MOND. This is compatible with the external gravitational field actually acting on the Milky Way.

4 pages, 1 figure; accepted for publication in MNRAS

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Cited by in corpus (73)

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• Galaxies as simple dynamical systems: observational data disfavor dark matter and stochastic star formation
• From galactic bars to the Hubble tension: weighing up the astrophysical evidence for Milgromian gravity
• Tidal dwarf galaxies as a test of fundamental physics
• Milky Way Mass Models and MOND
• The escape speed curve of the Galaxy obtained from Gaia DR2 implies a heavy Milky Way
• Velocity dispersion around ellipticals in MOND
• X-ray Group and cluster mass profiles in MOND: Unexplained mass on the group scale
• The KBC void and Hubble tension contradict $\Lambda$CDM on a Gpc scale $-$ Milgromian dynamics as a possible solution
• MOND effects in the inner solar system
• Milky Way potentials in CDM and MOND. Is the Large Magellanic Cloud on a bound orbit?
• Combined Solar System and rotation curve constraints on MOND
• Declining rotation curves of galaxies as a test of gravitational theory
• External field effect of modified Newtonian dynamics in the Solar system
• MOND simulation suggests the origin of some peculiarities in the Local Group
• Vertical dynamics of disk galaxies in MOND
• Loss of mass and stability of galaxies in MOND
• Strong constraints on the gravitational law from $Gaia$ DR3 wide binaries
• The collision velocity of the bullet cluster in conventional and modified dynamics
• MOND plus classical neutrinos not enough for cluster lensing
• Galactic kinematics with modified Newtonian dynamics
• Testing fundamental physics with distant star clusters: theoretical models for pressure-supported stellar systems
• The MOND Fundamental Plane
• Origin of the Local Group satellite planes
• Testing gravity with motion of satellites around galaxies: Newtonian gravity against Modified Newtonian Dynamics
• Generalizing MOND to explain the missing mass in galaxy clusters
• Modified gravity approach based on a preferred time foliation
• The global stability of M33 in MOND
• Mass models from high-resolution HI data of the dwarf galaxy NGC 1560
• Remarks on the properties of elliptical galaxies in modified Newtonian dynamics
• The Escape Velocity Curve of the Milky Way in Modified Newtonian Dynamics
• A census of the expected properties of classical Milky Way dwarfs in Milgromian dynamics
• Tidal radii and escape speeds in dwarf spheroidal galaxies under MOND and dark halos compared
• An analytic model for non-spherical lenses in covariant MOdified Newtonian Dynamics
• The Star Formation History and Dynamics of the Ultra-diffuse Galaxy Dragonfly 44 in MOND and MOG
• Modified Kepler's Law, Escape Speed and Two-body Problem in MOND-like Theories
• On the tension between the Radial Acceleration Relation and Solar System quadrupole in modified gravity MOND
• The phantom dark matter halos of the Local Volume in the context of modified Newtonian dynamics
• Distant star clusters of the Milky Way in MOND
• Lopsidedness of cluster galaxies in modified gravity
• The dynamical phase transitions of stellar systems and the corresponding kinetimacs
• N-body simulations for testing the stability of triaxial galaxies in MOND
• Substructure lensing in galaxy clusters as a constraint on low-mass sterile neutrinos in tensor-vector-scalar theory: The straight arc of Abell 2390
• Neutrinos as galactic dark matter in the Ursa Major galaxy group?
• Self-consistent models of triaxial galaxies in MOND gravity
• Dynamics of Elliptical Galaxies with Planetary Nebulae in Modified Newtonian Dynamics
• Dynamical History Of The Local Group In $\Lambda$CDM $\mathrm{II}$ $-$ Including External Perturbers In 3D
• Is Gravitational Lensing by Intercluster Filaments Always Negligible?
• MOND vs. Newtonian dynamics in early-type galaxies. The case of NGC 4649 (M60)
• Galactic orbital motions in the Dark Matter, MOdified Newtonian Dynamics and MOdified Gravity scenarios
• Origin of the fundamental plane of elliptical galaxies in the Coma Cluster without fine-tuning
• Sedna and the cloud of comets surrounding the Solar System in Milgromian dynamics
• Physics of galactic colliders: high speed satellites in LCDM vs MONDian cosmology
• MOND orbits in the Oort cloud
• Lopsidedness of self-consistent galaxies by the external field effect of clusters
• Testing the Newton second law in the regime of small accelerations
• Birkhoff's theorem fails to save MOND from non-local physics
• Satellite Test of the Equivalence Principle as a Probe of Modified Newtonian Dynamics
• On the MOND External Field Effect in the Solar System
• Are Over-massive Haloes of Ultra Diffuse Galaxies Consistent with Extended MOND?
• Observational Constraints on the Modified Gravity Model (MOG) Proposed by Moffat: Using the Magellanic System
• The MOND External Field Effect on the Dynamics of the Globular Clusters: General Considerations and Application to NGC 2419
• Galaxy Bulges As Tests of CDM vs MOND in Strong Gravity
• Testing MOND in the Solar System
• Gas expulsion in MOND: the possible origin of diffuse globular clusters and ultra-faint dwarf galaxies
• Simulations of cluster ultra-diffuse galaxies in MOND
• Can MONDian vector theories explain the cosmic speed up ?
• The kinematics of star clusters undergoing gas expulsion in Newtonian and Milgromian dynamics
• Peculiar dark matter halos inferred from gravitational lensing as a manifestation of modified gravity
• Formation of collisional ring galaxies in Milgromian dynamics
• Local Group timing in Milgromian dynamics. A past Milky Way-Andromeda encounter at z>0.8
• Constraining the MOdified Newtonian Dynamics from spherically symmetrical hydrodynamic accretion