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Title: Galactic cold dark matter as a Bose-Einstein condensate of WISPs

Abstract

We propose here the dark matter content of galaxies as a cold bosonic fluid composed of Weakly Interacting Slim Particles (WISPs), represented by spin-0 axion-like particles and spin-1 hidden bosons, thermalized in the Bose-Einstein condensation state and bounded by their self-gravitational potential. We analyze two zero-momentum configurations: the polar phases in which spin alignment of two neighbouring particles is anti-parallel and the ferromagnetic phases in which every particle spin is aligned in the same direction. Using the mean field approximation we derive the Gross-Pitaevskii equations for both cases, and, supposing the dark matter to be a polytropic fluid, we describe the particles density profile as Thomas-Fermi distributions characterized by the halo radii and in terms of the scattering lengths and mass of each particle. By comparing this model with data obtained from 42 spiral galaxies and 19 Low Surface Brightness (LSB) galaxies, we constrain the dark matter particle mass to the range 10{sup −6}–10{sup −4} eV and we find the lower bound for the scattering length to be of the order 10{sup −14} fm.

Authors:
;  [1]
  1. Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Rua Santa Adélia 166, 09210-170, Santo André, SP (Brazil)
Publication Date:
OSTI Identifier:
22279752
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2012; Journal Issue: 11; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; APPROXIMATIONS; ASTROPHYSICS; AXIONS; BOSE-EINSTEIN CONDENSATION; BOSONS; BRIGHTNESS; COMPARATIVE EVALUATIONS; COSMOLOGY; EV RANGE; GALAXIES; MASS; MEAN-FIELD THEORY; NONLUMINOUS MATTER; POTENTIALS; SCATTERING LENGTHS; SPIN; THOMAS-FERMI MODEL

Citation Formats

Pires, M.O.C., and Souza, J.C.C. de, E-mail: marcelo.pires@ufabc.edu.br, E-mail: jose.souza@ufabc.edu.br. Galactic cold dark matter as a Bose-Einstein condensate of WISPs. United States: N. p., 2012. Web. doi:10.1088/1475-7516/2012/11/024.
Pires, M.O.C., & Souza, J.C.C. de, E-mail: marcelo.pires@ufabc.edu.br, E-mail: jose.souza@ufabc.edu.br. Galactic cold dark matter as a Bose-Einstein condensate of WISPs. United States. doi:10.1088/1475-7516/2012/11/024.
Pires, M.O.C., and Souza, J.C.C. de, E-mail: marcelo.pires@ufabc.edu.br, E-mail: jose.souza@ufabc.edu.br. Thu . "Galactic cold dark matter as a Bose-Einstein condensate of WISPs". United States. doi:10.1088/1475-7516/2012/11/024.
@article{osti_22279752,
title = {Galactic cold dark matter as a Bose-Einstein condensate of WISPs},
author = {Pires, M.O.C. and Souza, J.C.C. de, E-mail: marcelo.pires@ufabc.edu.br, E-mail: jose.souza@ufabc.edu.br},
abstractNote = {We propose here the dark matter content of galaxies as a cold bosonic fluid composed of Weakly Interacting Slim Particles (WISPs), represented by spin-0 axion-like particles and spin-1 hidden bosons, thermalized in the Bose-Einstein condensation state and bounded by their self-gravitational potential. We analyze two zero-momentum configurations: the polar phases in which spin alignment of two neighbouring particles is anti-parallel and the ferromagnetic phases in which every particle spin is aligned in the same direction. Using the mean field approximation we derive the Gross-Pitaevskii equations for both cases, and, supposing the dark matter to be a polytropic fluid, we describe the particles density profile as Thomas-Fermi distributions characterized by the halo radii and in terms of the scattering lengths and mass of each particle. By comparing this model with data obtained from 42 spiral galaxies and 19 Low Surface Brightness (LSB) galaxies, we constrain the dark matter particle mass to the range 10{sup −6}–10{sup −4} eV and we find the lower bound for the scattering length to be of the order 10{sup −14} fm.},
doi = {10.1088/1475-7516/2012/11/024},
journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 11,
volume = 2012,
place = {United States},
year = {2012},
month = {11}
}