Results 71 to 80 of about 801,925 (377)
The offsets between galaxies and their dark matter in Λ cold dark matter. [PDF]
, 2015 We use the ‘Evolution and Assembly of GaLaxies and their Environments’ (EAGLE) suite of hydrodynamical cosmological simulations to measure offsets between the centres of stellar and dark matter components of galaxies.
M. Schaller +4 more
semanticscholar +1 more source
The Impact Of Cold Dark Matter Variants On The Halos Of The First Stars And Galaxies: Angular Momentum And Vortex Creation In BEC Dark Matter [PDF]
, 2010 If cold dark matter elementary particles form a Bose-Einstein condensate, their superfluidity may distinguish them from other forms of cold dark matter, including the creation of quantum vortices.
Rindler-Daller, T., Shapiro, P. R.
core +1 more source
Physics Letters B, 2014 In this paper, we study a cosmological model in general relativity within the framework of spatially flat Friedmann–Robertson–Walker space–time filled with ordinary matter (baryonic), radiation, dark matter and dark energy, where the latter two ...
Suresh Kumar, Lixin Xu
doaj +1 more source
Inference of the cold dark matter substructure mass function at z = 0.2 using strong gravitational lenses [PDF]
, 2014 We present the results of a search for galaxy substructures in a sample of 11 gravitational lens galaxies from the Sloan Lens ACS Survey by Bolton et al.
S. Vegetti +4 more
semanticscholar +1 more source
Particle Physics Approach to Dark Matter
, 2006 We review the main proposals of particle physics for the composition of the cold dark matter in the universe. Strong axion contribution to cold dark matter is not favored if the Peccei-Quinn field emerges with non-zero value at the end of inflation and ...
A. Djouadi +64 more
core +4 more sources
Bose-Einstein Condensation of Dark Matter Axions [PDF]
, 2009 We show that cold dark matter axions thermalize and form a Bose-Einstein condensate. We obtain the axion state in a homogeneous and isotropic universe, and derive the equations governing small axion perturbations.
Sikivie, P., Yang, Q.
core +1 more source
Closed-form Expressions for Multiscatter Dark Matter Capture Rates
The Astrophysical JournalAny astrophysical object can, in principle, serve as a probe of the interaction between dark matter (DM) and regular baryonic matter. This method is based on the potential observable consequences annihilations of captured DM have on the surface ...
Cosmin Ilie
doaj +1 more source
Strongly-interacting ultralight millicharged particles
Physics Letters B, 2021 We consider the implications of an ultra-light fermionic dark matter candidate that carries baryon number. This naturally arises if dark matter has a small charge under standard model baryon number whilst having an asymmetry equal and opposite to that in
Stephon Alexander +2 more
doaj +1 more source
Axion cold dark matter in view of BICEP2 results. [PDF]
Physical Review Letters, 2014 The properties of axions that constitute 100% of cold dark matter (CDM) depend on the tensor-to-scalar ratio r at the end of inflation. If r=0.20(-0.05)(+0.07) as reported by the BICEP2 Collaboration, then "half" of the CDM axion parameter space is ruled
P. Gondolo, L. Visinelli
semanticscholar +1 more source
Strong Bound on Canonical Ultralight Axion Dark Matter from the Lyman-Alpha Forest. [PDF]
Physical Review Letters, 2020 We present a new bound on the ultralight axion (ULA) dark matter mass m_{a}, using the Lyman-alpha forest to look for suppressed cosmic structure growth: a 95% lower limit m_{a}>2×10^{-20} eV.
K. K. Rogers, H. Peiris
semanticscholar +1 more source