A modification of the Newtonian dynamics - Implications for galaxies
1983/07/01 by M. Milgrom, Mordehai Milgrom · 1,069 citations
Physics and Astronomy · #Astronomy #Astrophysics #Disc #Experimental and Theoretical Physics Studies #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy formation and evolution #Galaxy rotation curve #Gravitation #Milky Way #Modified Newtonian dynamics #Physics #Satellite galaxy #Scientific Research and Discoveries
paper · doi:10.1086/161131
published in The Astrophysical Journal 270, 371 (IOP Publishing)
openalex publication_date 1983/07/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
Abstract
A form of the Newtonian dynamics which has been modified with respect to inertia and/or gravity is used to describe the motion of bodies in the gravitational fields of galaxies, under the assumption that galaxies contain no hidden mass. Among the consequences of this method which are presently discussed, it is noted that the Keplerian, circular velocity around a finite galaxy becomes independent of r at large radii, yielding asymptotically flat velocity curves. The discrepancy between the dynamically determined Oort density in the solar neighborhood and the density of observed matter, moreover, is found to disappear. It is predicted in view of these results that rotation curves calculated on the basis of the observed mass distribution and the modified dynamics should agree with the observed velocity curves.
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