2014/11/30 by J. C. C. de Souza, Maximiliano Ujevic, M. Ujevic · 28 citations
Physics and Astronomy · #Astrophysics #Cluster (spacecraft) #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark fluid #Dark matter #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy cluster #Physics #Scalar field dark matter #astro-ph.CO #gr-qc
paper · pdf · doi:10.1007/s10714-015-1934-0
published in General Relativity and Gravitation 47(9) (Springer Science+Business Media) · 11 pages, 5 figures; v2: 12 pages, matches published version
arxiv created 2015/08/06 · openalex publication_date 2015/08/06 · arxiv updated 2015/08/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We constrain scattering length parameters in a Bose-Einstein condensate dark matter model by using galaxy clusters radii, with the implementation of a method previously applied to galaxies. At the present work, we use a sample of 114 clusters radii in order to obtain the scattering lengths associated with a dark matter particle mass in the range 10-6-10-4 \rm eV. We obtain scattering lengths that are five orders of magnitude larger than the ones found in the galactic case, even when taking into account the cosmological expansion in the cluster scale by means of the introduction of a small cosmological constant. We also construct and compare curves for the orbital velocity of a test particle in the vicinity of a dark matter cluster in both the expanding and the non-expanding cases.