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Condensation of galactic cold dark matter
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Number of Authors: 1
2016 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, no 7, 009Article in journal (Refereed) Published
Abstract [en]

We consider the steady-state regime describing the density profile of a dark matter halo, if dark matter is treated as a Hose-Linstein condensate. We first solve the fluid equation for canonical cold dark matter, obtaining a class of density profiles which includes the Navarro-Frenk-White profile, and which diverge at the halo core. We then solve numerically the equation obtained when an additional quantum pressure term is included in the computation of the density profile. The solution to this latter case is finite at the halo core, possibly avoiding the cuspy halo problem present in some cold dark matter theories. Within the model proposed, we predict the mass of the cold dark matter particle to be of the order of M(chi)c(2) approximate to 10(-24) eV, which is of the same order of magnitude as that predicted in ultra-light scalar cold dark matter models. Finally, we derive the differential equation describing perturbations in the density and the pressure of the dark matter fluid.

Place, publisher, year, edition, pages
2016. no 7, 009
Keyword [en]
dark matter theory, gravity
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-134170DOI: 10.1088/1475-7516/2016/07/009ISI: 000381830000010OAI: diva2:1040777
Available from: 2016-10-28 Created: 2016-10-03 Last updated: 2016-10-28Bibliographically approved

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Visinelli, Luca
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