Results 21 to 30 of about 738,678 (282)

Interacting viscous dark fluids [PDF]

Physical Review D, 2013
16 pages, 11 figures, 5 ...
Avelino, Arturo, Leyva, Yoelsy, Urena-Lopez, L. Arturo   +2 more
openaire   +2 more sources

Gravitational lensing by a charged spherically symmetric black hole immersed in thin dark matter

European Physical Journal C: Particles and Fields, 2023
We investigate the gravitational lensing effect around a spherically symmetric black hole, whose metric is obtained from the Einstein field equation with electric charge and perfect-fluid dark matter contributing to its energy-momentum tensor.
Xiao-Jun Gao, Xiao-kun Yan, Yihao Yin, Ya-Peng Hu   +3 more
doaj   +1 more source

Dissipative unified dark fluid: Observational constraints

Journal of High Energy Astrophysics, 2023
We adopt a standard FRW cosmology with a unified scenario, where the usual dark matter and dark energy sectors are replaced by a single dissipative unified dark fluid (DUDF). The equation of state of such fluid can asymptote between two power laws. As a result, it enables fluid to have a smooth transition from dust at early times to dark energy at late
Esraa Ali Elkhateeb, Mahmoud Hashim
openaire   +2 more sources

Unifying dark matter, dark energy and inflation with a fuzzy dark fluid [PDF]

Journal of Cosmology and Astroparticle Physics, 2021
23 pages, 6 ...
Arbey, A., Coupechoux, J.-F
openaire   +4 more sources

On Exotic Objects Made of Dark Energy and Dark Matter: Mass-to-Radius Profiles and Tidal Love Numbers

Galaxies, 2023
We investigate some properties of exotic spherical configurations made of dark matter and dark energy. For the former, we adopt a polytropic equation-of-state, while for the latter, we adopt the extended Chaplygin gas equation-of-state.
Camila Sepúlveda, Grigoris Panotopoulos
doaj   +1 more source

Dark energy with logarithmic cosmological fluid [PDF]

Journal of the Korean Physical Society, 2014
14 pages, 1 figure, to be published in The Journal of the Korean Physical ...
Kouwn, Seyen, Oh, Phillial
openaire   +2 more sources

Perfect fluid dark matter

Physics Letters B, 2010
7 pages, 5 figures, To appear in Phys. Lett. B (2010)
Rahaman, F., Nandi, K.K., Bhadra, A., Kalam, M., Chakraborty, K.   +4 more
openaire   +2 more sources

Galactic halos of fluid dark matter [PDF]

Physical Review D, 2003
Dwarf spiral galaxies - and in particular the prototypical DDO 154 - are known to be completely dominated by an unseen component. The putative neutralinos - so far the favored explanation for the astronomical dark matter - fail to reproduce the well measured rotation curves of those systems because these species tend to form a central cusp whose ...
Arbey, Alexandre, Lesgourgues, Julien, Salati, Pierre   +2 more
openaire   +2 more sources

Rip Cosmology via Inhomogeneous Fluid

Galaxies, 2013
The conditions for the appearance of the Little Rip, Pseudo Rip and Quasi Rip universes in the terms of the parameters in the equation of state of some dark fluid are investigated. Several examples of the Rip cosmologies are investigated.
Alexander V. Timoshkin, Valerii V. Obukhov, Evgenii V. Savushkin   +2 more
doaj   +1 more source

Viscous dark fluid

Physics Letters B, 2008
4 pages, 1 figure, added ...
Folomeev, Vladimir, Gurovich, Victor
openaire   +2 more sources