Self-gravitating strange dark matter halos around galaxies
Journal
Date Issued
2020
Author(s)
Abstract
A new family of nonrelativistic, Newtonian, non-quantum equilibrium
configurations describing galactic halos is introduced, by considering strange
quark matter conglomerates with masses larger than about 8 GeV as new possible
components of the dark matter. Originally introduced to explain the state of
matter in neutron stars, such conglomerates may also form in the high-density
and temperature conditions of the primordial Universe and then decouple from
ordinary baryonic matter, providing the fundamental components of dark matter
for the formation of pristine gravitational potential wells and the subsequent
evolution of cosmic structures. The obtained results for halo mass and radius
are consistent with the rotational velocity curve observed in the Galaxy.
Additionally, the average density of such dark matter halos is similar to that
derived for halos of dwarf spheroidal galaxies, which can therefore be
interpreted as downscaled versions of larger dark matter distributions around
Milky Way-sized galaxies and hint for a common origin of the two families of
cosmic structures.
Volume
102
Issue
8
Issn Identifier
2470-0010
Ads BibCode
2020PhRvD.102h3015M
Rights
open.access
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