Dark matter superfluid and DBI dark energy

Abstract

It was shown recently that, without jeopardizing the success of the $\Lambda$ cold dark matter model on cosmic scales, the modified Newtonian dynamics (MOND) can be derived as an emergent phenomenon when axionlike dark matter particles condense into superfluid on the galactic scales. We propose in this paper a Dirac-Born-Infeld (DBI) scalar field conformally coupled to the matter components. To maintain the success of MOND phenomenon of dark matter superfluid on the galactic scales, the fifth force introduced by the DBI scalar should be screened on the galactic scales. It turns out that the screening effect naturally leads to a simple explanation for a longstanding puzzle that the MOND critical acceleration coincides with present Hubble scale. This galactic coincidence problem is solved, provided that the screened DBI scalar also plays the role of dark energy on the cosmic scales.

v1, 4 pages, no figure; v2, 8 pages, 4 figures, numerical justifications added; v3, references added, final version to match the published version

References in corpus (2)

• Beyond the Cosmological Standard Model
• GHASP : an H alpha kinematic survey of spiral and irregular galaxies. V. Dark matter distribution in 36 nearby spiral galaxies

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• Emergent Dark Matter in Late Time Universe on Holographic Screen
• The growth of DM and DE perturbations in DBI non-canonical scalar field scenario
• The influence of cosmological constant on light deflection in rotating spacetimes via the generalized Gibbons-Werner method