alexa The modified Newtonian dynamics—MOND and its implications for new physics
Physics

Physics

Journal of Astrophysics & Aerospace Technology

Author(s): Jacob D Bekenstein

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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 disk 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 favor 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 T e V eS, 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

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This article was published in THE ASTROPHYSICAL JOURNAL and referenced in Journal of Astrophysics & Aerospace Technology

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