Results 61 to 70 of about 143,913 (244)
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
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 +4 more sources
Rotation curves of high-resolution LSB and SPARC galaxies with fuzzy and multistate (ultralight boson) scalar field dark matter [PDF]
, 2017 Cold dark matter (CDM) has shown to be an excellent candidate for the dark matter (DM) of the Universe at large scales, however it presents some challenges at the galactic level. The scalar field dark matter (SFDM), also called fuzzy, wave, Bose-Einstein
T. Bernal +3 more
semanticscholar +1 more source
Pulsar timing residual induced by ultralight vector dark matter
European Physical Journal C: Particles and Fields, 2020 We study the ultralight vector dark matter with a mass around $$10^{-23}\,\mathrm {eV}$$ 10-23eV . The vector field oscillating coherently on galactic scales induces oscillations of the spacetime metric with a frequency around nHz, which is detectable by
Kimihiro Nomura, Asuka Ito, Jiro Soda
doaj +1 more source
Detectability of ultralight scalar field dark matter with gravitational-wave detectors [PDF]
Physical Review D, 2018 An ultralight scalar field is one of the dark matter candidates. If it couples with Standard Model particles, it oscillates mirrors in gravitational-wave detectors and generates detectable signals.
S. Morisaki, T. Suyama
semanticscholar +1 more source
Revise the Dark Matter-Phantom Scalar Field Interaction [PDF]
Physica ScriptaAbstract The cosmological history and evolution are examined for gravitational models that include interaction within the dark sector of the Universe. In particular, we consider dark energy to be described by a phantom scalar field, while dark matter ρ m is modeled as a ...
Andronikos Paliathanasis +2 more
+6 more sources
Conformally coupled dark matter [PDF]
, 1996 Dark matter is obtained from a scalar field coupled conformally to gravitation; the scalar being a relict of Dirac's gauge function. This conformally coupled dark matter includes a gas of very light ($m\approx 2.25\times 10^{-34} eV$) neutral bosons ...
A. Tyson +20 more
core +2 more sources
Cosmic microwave background constraints on coupled dark matter
Physics Letters B, 2015 We study CMB constraints on a scenario where a fraction of dark matter is non-minimally coupled to a massless scalar field and dark energy is in the form of a cosmological constant.
Sophie C.F. Morris, Anne M. Green
doaj +1 more source
Sensitivity of Atom Interferometry to Ultralight Scalar Field Dark Matter. [PDF]
Physical Review Letters, 2016 We discuss the use of atom interferometry as a tool to search for dark matter (DM) composed of virialized ultralight fields (VULFs). Previous work on VULF DM detection using accelerometers has considered the possibility of equivalence-principle-violating
A. Geraci, A. Derevianko
semanticscholar +1 more source
Physics Letters B, 2016 We consider a resonant SIMP dark matter in models with two singlet complex scalar fields charged under a local dark U(1)D. After the U(1)D is broken down to a Z5 discrete subgroup, the lighter scalar field becomes a SIMP dark matter which has the ...
Soo-Min Choi, Hyun Min Lee
doaj +1 more source