Title: The modified Newtonian dynamics—MOND and its implications for new physics
Abstract: Abstract No more salient issue exists in contemporary astrophysics and cosmology than that of the elusive 'dark matter'. For many years already Milgrom's paradigm of modified Newtonian dynamics (MOND) has provided an alternative way to interpret observations without appeal to invisible dark matter. MOND had been successful in elucidating economically the dynamics of disc galaxies of all scales, while doing less well for clusters of galaxies; in its original form it could not address gravitational lensing or cosmology. After reviewing some of the evidence in favour of MOND, I recollect the development of relativistic formulations for it to cope with the last deficiency. I comment on recent work by various groups in confronting TeVeS, a relativistic embodiment of MOND, with observational data on gravitational lensing and cosmology. Throughout I ask what sort of physics can be responsible for the efficacy of MOND, and conclude with an appraisal of what theoretical developments are still needed to reach a full description of the world involving no unobserved matter. Acknowledgements I thank Mordehai Milgrom, Bob Sanders and Stacy McGaugh for many useful remarks on the original manuscript, and the last two as well as Douglas Clowe for providing figures. Research on this subject has been supported by grant 694/04 from the Israel Science Foundation established by the Israel Academy of Sciences and Humanities.
Publication Year: 2006
Publication Date: 2006-11-01
Language: en
Type: article
Indexed In: ['crossref', 'datacite']
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Cited By Count: 69
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