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Milgrom's revision of Newton's laws - Dynamical and cosmological consequencesMilgrom's (1983) recent revision of Newtonian dynamics was introduced to eliminate the inference that large quantities of invisible mass exist in galaxies. It is shown by simple examples that a Milgrom acceleration, in the form presented so far, implies other far-reaching changes in dynamics. The momentum of an isolated system is not conserved, and the usual theorem for center-of-mass motion of any system does not hold. Naive applications require extreme caution. The model fails to provide a complete description of particle dynamics and should be thought of as a revision of Kepler's laws rather than Newton's. The Milgrom acceleration also implies fundamental changes in cosmology. A quasi-Newtonian calculation adapted from Newtonian cosmology suggests that a 'Milgrom universe' will recollapse even if the classical closure parameter Omega is much less than unity. The solution, however, fails to satisfy the cosmological principle. Reasons for the breakdown of this calculation are examined. A new theory of gravitation will be needed before the behavior of a Milgrom universe can be predicted.
Document ID
19850036025
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Felten, J. E. (NASA Goddard Space Flight Center Laboratory for Extraterrestrial Physics, Greenbelt; Maryland, University, College Park, MD, United States)
Date Acquired
August 12, 2013
Publication Date
November 1, 1984
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 286
ISSN: 0004-637X
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAGW-12
CONTRACT_GRANT: NGL-21-002-033
Distribution Limits
Public
Copyright
Other