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A modification of the Newtonian dynamics - Implications for galaxies
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Milgrom’s modified Newtonian dynamics, which alters inertia or gravity without invoking dark matter, predicts that galaxy rotation curves derived from observed mass distributions should match observed flat velocity profiles at large radii. The model yields asymptotically flat circular velocity curves and eliminates the discrepancy between the dynamically inferred Oort density and the observed matter density in the solar neighborhood. Published in The Astrophysical Journal (July 1983), DOI 10.1086/161131.
view Abstract Citations (852) References (59) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A modification of the Newtonian dynamics - Implications for galaxies. Milgrom, M. 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. Publication: The Astrophysical Journal Pub Date: July 1983 DOI: 10.1086/161131 Bibcode: 1983ApJ...270..371M Keywords: Galactic Structure; Newton Theory; Stellar Motions; Angular Velocity; Disk Galaxies; Elliptical Galaxies; Galactic Rotation; Mass Distribution; Milky Way Galaxy; Oort Cloud; Astrophysics full text sources ADS |