Results 51 to 60 of about 147,206 (344)
Scalar field dark matter spectator during inflation: the effect of self-interaction [PDF]
Journal of Cosmology and Astroparticle Physics, 2019 Nowadays cosmological inflation is the most accepted mechanism to explain the primordial seeds that led to the structure formation observed in the Universe.
Luis E. Padilla +3 more
semanticscholar +1 more source
How the Scalar Field of Unified Dark Matter Models Can Cluster [PDF]
, 2008 We use scalar-field Lagrangians with a non-canonical kinetic term to obtain unified dark matter models where both the dark matter and the dark energy, the latter mimicking a cosmological constant, are described by the scalar field itself.
Bartolo, Nicola +3 more
core +2 more sources
Scalar-field theory of dark matter [PDF]
International Journal of Modern Physics A, 2014 We develop a theory of dark matter based on a previously proposed picture, in which a complex vacuum scalar field makes the universe a superfluid, with the energy density of the superfluid giving rise to dark energy, and variations from vacuum density giving rise to dark matter. We formulate a nonlinear Klein–Gordon equation to describe the superfluid,
Huang, Kerson, Xiong, Chi, Zhao, Xiaofei
openaire +2 more sources
Universe, 2020 The generalized hybrid metric-Palatini theory of gravity admits a scalar-tensor representation in terms of two interacting scalar fields. We show that, upon an appropriate choice of the interaction potential, one of the scalar fields behaves like dark ...
Paulo M. Sá
doaj +1 more source
Stability of Cauchy horizon in a charged de-Sitter spacetime with dark matter
European Physical Journal C: Particles and Fields, 2023 The violation of strong cosmic censorship (SCC) in RNdS black holes by a minimally coupled neutral massless scalar field has recently been discovered. This paper investigates the stability of the Cauchy horizon of a spherically charged de-Sitter black ...
Xue-Ying Nan, Jia Tan, Jie Jiang
doaj +1 more source
Testing the mean field theory of scalar field dark matter
SciPost Physics Proceedings, 2023 Scalar field dark matter offers an interesting alternative to the traditional WIMP dark matter picture. Astrophysical and cosmological simulations are useful to constraining the mass of the dark matter particle in this model. This is particularly true at
Andrew Eberhardt, Alvaro Zamora, Michael Kopp, Tom Abel
doaj +1 more source
A stable finite-volume method for scalar field dark matter [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We describe and test a family of new numerical methods to solve the Schrödinger equation in self-gravitating systems, e.g. Bose–Einstein condensates or ‘fuzzy’/ultra-light scalar field dark matter.
P. Hopkins
semanticscholar +1 more source
Dark sector impact on gravitational collapse of an electrically charged scalar field [PDF]
, 2015 Dark matter and dark energy are dominating components of the Universe. Their presence affects the course and results of processes, which are driven by the gravitational interaction.
Nakonieczna, Anna +2 more
core +2 more sources
Scalar-field dark energy nonminimally and kinetically coupled to dark matter [PDF]
Physical Review D, 2019 We provide a general framework for studying the dark energy cosmology in which a scalar field ϕ is nonminimally and kinetically coupled to cold dark matter (CDM).
R. Kase, S. Tsujikawa
semanticscholar +1 more source
COMPLEX SCALAR FIELD DARK MATTER ON GALACTIC SCALES [PDF]
Modern Physics Letters A, 2014 The nature of the cosmological dark matter (DM) remains elusive. Recent studies have advocated the possibility that DM could be composed of ultra-light, self-interacting bosons, forming a Bose–Einstein condensate (BEC) in the very early Universe. We consider models which are charged under a global U(1)-symmetry such that the DM number is conserved. It
Rindler-Daller, Tanja, Shapiro, Paul R.
openaire +2 more sources