Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 8, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2011/08/016
Keywords
rotation curves of galaxies; dark matter theory
Funding
- Taiwan National Science Council [NSC 97-2112-M-002-026-MY3]
- US Department of Energy [DE-AC03-76SF00515]
- National Center for Theoretical Sciences of Taiwan
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Matos, Guzman and Nunez (MGN) proposed a model of galactic halo based on an exponential-potential scalar field that could induce a rotation curve that is constant for all radii. We demonstrate that with suitable boundary conditions, such scalar field dark matter (SDM) can not only produce the observed constant rotation curve at large radii but also give rise to the correct power-law scaling near the galactic core region. This solves the existing cusp-core problem faced by the conventional cold dark matter (CDM) model.
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