Alternatives to dark matter: MOND+Mach

Details Alternatives to dark matter: MOND+Mach Alternatives to dark matter: MOND+Mach

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cic..book..164r&link_type=abstract

In: Current issues in cosmology. Edited by Jean-Claude Pecker and Jayant Narlikar. Cambridge, UK: Cambridge University Press, IS

Physics

Cosmology

Scientific paper

Modified Newtonian dynamics (MOND) is an empirically motivated modification of Newtonian gravity (or, equivalently, of inertia) suggested by Milgrom as an alternative to cosmic dark matter. The basic idea is that at accelerations below a0≍1.2×10-10 m s-2 the effective gravitational attraction approaches √gna0, where gn is the usual Newtonian acceleration. This simple algorithm yields flat rotation curves for spiral galaxies and a mass-rotation velocity relation of the form M∝V4 that forms the basis for the observed luminosity-rotation velocity relation- the Tully-Fisher law. The second approach, considered only very briefly here, is theoretically motivated and based on a hardline interpreation of Mach's principle.

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