Results 71 to 80 of about 147,206 (344)
Multistate scalar field dark matter and its correlation with galactic properties [PDF]
, 2017 In this paper, we search for correlations between the intrinsic properties of galaxies and the Bose-Einstein condensate (BEC) under a scalar field dark matter (SFDM) at temperature of condensation greater than zero.
A. Hernández-Almada +2 more
semanticscholar +1 more source
Scalar field dark matter in clusters of galaxies [PDF]
, 2016 One alternative to the cold dark matter (CDM) paradigm is the scalar field dark matter (SFDM) model, which assumes dark matter is a spin-0 ultra-light scalar field (SF) with a typical mass $m\sim10^{-22}\mathrm{eV}/c^2$ and positive self-interactions ...
T. Bernal, V. Robles, T. Matos
semanticscholar +1 more source
Advances in High Energy Physics, 2017 We investigate matter creation processes during the reheating period of the early Universe, by using the thermodynamic of open systems. The Universe is assumed to consist of the inflationary scalar field, which, through its decay, generates relativistic ...
Juntong Su +2 more
doaj +1 more source
Bose-Einstein-condensed scalar field dark matter and the gravitational wave background from inflation: New cosmological constraints and its detectability by LIGO [PDF]
, 2016 We consider an alternative cold dark matter candidate, ultralight bosons ($m>10^{-22}$eV) described by a complex scalar field (SFDM) with global U(1) symmetry, with comoving particle number density conserved after particle production during standard ...
Bohua Li, P. Shapiro, T. Rindler-Daller
semanticscholar +1 more source
interplay between black holes and ultralight dark matter: analytic solutions
Journal of High Energy Physics, 2023 Dark matter (DM) can consist of a scalar field so light that DM particles in the galactic halo are best described by classical waves. We investigate how these classical solutions are influenced by the presence of a non-rotating supermassive black hole at
Bruno Bucciotti, Enrico Trincherini
doaj +1 more source
The Open Journal of Astrophysics, 2021 We apply the squeezed state formalism to scalar field dark matter (e.g. axion) perturbations generated during inflation. As for the inflationary perturbations, the scalar field state becomes highly squeezed as modes exit the horizon. For as long as $H>m_\
Jondalar L. J. Kuß, David J. E. Marsh
doaj +1 more source
Static Configurations of Dark Energy and Dark Matter
, 2005 We study static configurations of dark matter coupled to a scalar field responsible for the dark energy of the Universe. The dark matter is modelled as a Fermi gas within the Thomas-Fermi approximation. The mass of the dark matter particles is a function
Barbieri R Hall L J Oliver S J Strumia A +11 more
core +3 more sources
Is Dark Matter a BEC or Scalar Field? [PDF]
Journal of the Korean Physical Society, 2009 This is a brief review on the history of the Bose-Einstein condensate (BEC) or boson star model of galactic dark matter halos, where ultra-light scalar dark matter particles condense in a single BEC quantum state. The halos can be described as a self-gravitating, possibly self-interacting, coherent scalar field.
openaire +2 more sources
Oscillating scalar-field dark matter in supergravity [PDF]
Journal of High Energy Physics, 2001 We show that an oscillating scalar field in supergravity of mass of the order of $\sim$ TeV with a nonzero vacuum expectation value ($\sim 10^{10}$ GeV) can be a candidate of cold dark matter (CDM). To avoid the gravitino problem, we need a low reheating temperature after the primordial inflation.
Seto, Osamu +2 more
openaire +2 more sources
Irreversible thermodynamic description of interacting dark energy - dark matter cosmological models
, 2013 We investigate the interaction between dark energy and dark matter in the framework of irreversible thermodynamics of open systems with matter creation/annihilation.
Harko, Tiberiu, Lobo, Francisco S. N.
core +1 more source