Dipolar Dark Matter and Dark Energy

Abstract

In previous work [L. Blanchet and A. Le Tiec, Phys. Rev. D 78, 024031 (2008)], a model of dark matter and dark energy based on the concept of gravitational polarization was investigated. This model was shown to recover the concordance cosmological scenario (Lambda-CDM) at cosmological scales, and the phenomenology of the modified Newtonian dynamics (MOND) at galactic scales. In this article we prove that the model can be formulated with a simple and physically meaningful matter action in general relativity. We also provide alternative derivations of the main results of the model, and some details on the variation of the action.

11 pages, 2 figures; minor stylistic corrections, added references, added appendix; to appear in Phys. Rev. D

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• The failures of the standard model of cosmology require a new paradigm
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• Modified gravity approach based on a preferred time foliation
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• Studying Antimatter Gravity with Muonium
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• Dipolar Dark Matter as an Effective Field Theory
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• Dynamics of DiskMass Survey galaxies in refracted gravity
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• Testing Modified Dark Matter with Galaxy Clusters: Does Dark Matter know about the Cosmological Constant?
• Modified Baryonic Dynamics: two-component cosmological simulations with light sterile neutrinos
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