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  Extended LCDM: generalized non-minimal coupling for dark matter fluids

Bettoni, D., Liberati, S., & Sindoni, L. (2011). Extended LCDM: generalized non-minimal coupling for dark matter fluids. Journal of Cosmology and Astroparticle Physics, 11: 007. doi:10.1088/1475-7516/2011/11/007.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-14CC-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-14CE-5
Genre: Journal Article

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1108.1728 (Preprint), 211KB
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 Creators:
Bettoni, Dario, Author
Liberati, Stefano, Author
Sindoni, Lorenzo1, Author              
Affiliations:
1Microscopic Quantum Structure & Dynamics of Spacetime, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_67201              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc,Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO
 Abstract: In this paper we discuss a class of models that address the issue of explaining the gravitational dynamics at the galactic scale starting from a geometric point of view. Instead of claiming the existence of some hidden coupling between dark matter and baryons, or abandoning the existence of dark matter itself, we consider the possibility that dark matter and gravity have some non trivial interaction able to modify the dynamics at astrophysical scales. This interaction is implemented assuming that dark matter gets non--minimally coupled with gravity at suitably small scales and late times. After showing the predictions of the model in the Newtonian limit we also discuss the possible origin of it non-minimal coupling. This investigation seems to suggest that phenomenological mechanisms envisaged for the dark matter dynamics, such as the Bose--Einstein condensation of dark matter halos, could be connected to this class of models.

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 Dates: 2011-08-082011
 Publication Status: Published in print
 Pages: 14 pages
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1108.1728
DOI: 10.1088/1475-7516/2011/11/007
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Title: Journal of Cosmology and Astroparticle Physics
Source Genre: Journal
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Publ. Info: Bristol, England : Institute of Physics Pub.
Pages: - Volume / Issue: 11 Sequence Number: 007 Start / End Page: - Identifier: ISSN: 1475-7516
CoNE: /journals/resource/111055183238000_1