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Title:
A modification of the Newtonian dynamics - Implications for galaxies
Authors:
Milgrom, M.
Affiliation:
AA(Weizmann Institute of Science, Rehovot, Israel; Institute for Advanced Study, Princeton, NJ)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 270, July 15, 1983, p. 371-389. Research supported by the U.S.-Israel Binational Science Foundation. (ApJ Homepage)
Publication Date:
07/1983
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Galactic Structure, Newton Theory, Stellar Motions, Angular Velocity, Disk Galaxies, Elliptical Galaxies, Galactic Rotation, Mass Distribution, Milky Way Galaxy, Oort Cloud
DOI:
10.1086/161131
Bibliographic Code:
1983ApJ...270..371M

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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Database: Astronomy
Physics
arXiv e-prints