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Article overview
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Recovering modified Newtonian dynamics by changing inertia | | Ling-Jun Wang
; | | Date: |
16 Nov 2010 | | Abstract: | Milgrom’s modified Newtonian dynamics (MOND) has done a great job on
accounting for the rotation curves of a variety of galaxies by assuming that
Newtonian dynamics breaks down for extremely low acceleration typically found
in the galactic contexts. This breakdown of Newtonian dynamics may be a result
of modified gravity or a manifest of modified inertia. The MOND phenomena are
derived here based on three general assumptions: 1) Gravitational mass is
conserved; 2) Inverse-square law is applicable at large distance; 3) Inertial
mass depends on external gravitational fields. These assumptions not only
recover the deep-MOND behavior, the accelerating expansion of the universe is
also a result of these assumptions. Then Lagrangian formulae are developed and
it is found that the assumed universal acceleration constant is actually slowly
varying. This varying ’constant’ is just enough to account for the
mass-discrepancy presented in bright clusters. | | Source: | arXiv, 1011.3618 | | Services: | Forum | Review | PDF | Favorites | |
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