Phenomenology of the Modified Newtonian Dynamics and the Concordance Cosmological Scenario

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dc.creatorBlanchet, Luc
dc.creatorTiec, Alexandre Le
dc.date2008-07-08
dc.date.accessioned2026-07-07T09:49:03Z
dc.date.available2026-07-07T09:49:03Z
dc.descriptionAfter reviewing the modified Newtonian dynamics (MOND) proposal, we advocate that the associated phenomenology may actually not result from a modification of Newtonian gravity, but from a mechanism of "gravitational polarization" of some dipolar medium playing the role of dark matter. We then build a relativistic model within standard general relativity to describe (at some phenomenological level) the dipolar dark matter polarizable in a gravitational field. The model naturally involves a cosmological constant, and is shown to reduce to the concordance cosmological scenario (Lambda-CDM) at early cosmological times. From the mechanism of gravitational polarization, we recover the phenomenology of MOND in a typical galaxy at low redshift. Furthermore, we show that the cosmological constant Lambda scales like a0^2, where a0 is the constant MOND acceleration scale, in good agreement with observations.
dc.description8 pages; to appear in the Proceedings of the "43rd Rencontres de Moriond", La Thuile (Italy), March 2008, edited by J. Dumarchez, Y. Giraud-Heraud and J. Tran Thanh Van
dc.identifierhttps://arxiv.org/abs/0807.1200
dc.identifierhttp://arxiv.org/abs/0807.1200
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/164442
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titlePhenomenology of the Modified Newtonian Dynamics and the Concordance Cosmological Scenario
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