Results 71 to 80 of about 8,643,173 (282)
Dark Energy Scaling from Dark Matter to Acceleration [PDF]
, 2014 The dark sector of the Universe need not be completely separable into distinct dark matter and dark energy components. We consider a model of early dark energy in which the dark energy mimics a dark matter component in both evolution and perturbations at
Bielefeld, Jannis +2 more
core +3 more sources
, 2004 I briefly review our current understanding of dark matter and dark energy. The first part of this paper focusses on issues pertaining to dark matter including observational evidence for its existence, current constraints and the `abundance of ...
197 +13 more
core +1 more source
Inhomogeneous dark energy [PDF]
Journal of Cosmology and Astroparticle Physics, 2016 11 ...
Ali H. Chamseddine +2 more
openaire +4 more sources
Improvement of airfoil trailing edge bluntness noise model
Advances in Mechanical Engineering, 2016 In this article, airfoil trailing edge bluntness noise is investigated using both computational aero-acoustic and semi-empirical approach. For engineering purposes, one of the most commonly used prediction tools for trailing edge noise are based on semi ...
Wei Jun Zhu +3 more
doaj +1 more source
Physical Review D, 2004 We investigate the possibility of a dark energy component that is scaling with epochs. A phenomenological model is introduced whose energy density depends on the redshift in such a way that a smooth transition among the three dominant phases of the universe evolution (radiation era, matter domination, asymptotic de Sitter state) is achieved. We use the
CAPOZZIELLO, SALVATORE +2 more
openaire +5 more sources
Quantum Informational Dark Energy: Dark energy from forgetting
, 2007 We suggest that dark energy has a quantum informational origin. Landauer's principle associated with the erasure of quantum information at a cosmic horizon implies the non-zero vacuum energy having effective negative pressure.
Eva K. Lee +4 more
core +1 more source
The Revival of the Unified Dark Energy-Dark Matter Model ? [PDF]
, 2004 We consider the generalized Chaplygin gas (GCG) proposal for unification of dark energy and dark matter and show that it admits an unique decomposition into dark energy and dark matter components once phantom-like dark energy is excluded.
A. A. Sen +11 more
core +1 more source
Physics Letters B, 2003 By studying the present cosmological data, particularly on CMB, SNeIA and LSS, we find that the future fate of the universe, for simple linear models of the dark energy equation-of-state, can vary between the extremes of (I) a divergence of the scale factor in as little as 7 Gyr; (II) an infinite lifetime of the universe with dark energy dominant for ...
Tomo Takahashi, Paul H. Frampton
openaire +4 more sources
, 2005 We describe the Dark Energy Survey (DES), a proposed optical-near infrared survey of 5000 sq. deg of the South Galactic Cap to ~24th magnitude in SDSS griz, that would use a new 3 sq.
The Dark Energy Survey Collaboration
core +1 more source
, 2004 Chameleons are scalar fields whose mass depends on the environment, specifically on the ambient matter density. While nearly massless in the cosmos, where the matter density is tiny, their mass is of order of an inverse millimeter on Earth, where the ...
Brax, Ph. +4 more
core +2 more sources