Journal ArticleDOI
Various aspects of interacting modified holographic Ricci dark energy
TLDR
In this article, the authors reported various aspects of modified holographic Ricci dark energy interacting with pressureless dark matter in a flat Friedman-Robertson-Walker universe, and the cosmological parameters, namely, Hubble parameter, equation of state parameter and deceleration parameter have been studied under this interaction.Abstract:
The present paper reports various aspects of modified holographic Ricci dark energy interacting with pressureless dark matter in a flat Friedman-Robertson-Walker universe. The cosmological parameters, namely, Hubble parameter, equation of state parameter and deceleration parameter have been studied under this interaction. Statfinder diagnostics has also been studied, where attainment of $$\Uplambda$$
CDM phase of the universe under this interaction has been observed. A study on fractional densities has prominently shown the transition from matter dominated to dark energy dominated universe.read more
Citations
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A Rindler-KAM Spacetime Geometry and Scaling the Planck Scale Solves Quantum Relativity and Explains Dark Energy
TL;DR: In this paper, an ultra high======energy combined KAM-Rindler fractal spacetime quantum manifold, which increasingly resembles Einstein's smooth relativity spacetime, with decreasing energy, was introduced.
Journal ArticleDOI
Generalized holographic Ricci dark energy and generalized second law of thermodynamics in Bianchi Type I universe
TL;DR: In this paper, the generalized second law of thermodynamics in the Bianchi Type I universe with the generalized holographic Ricci dark energy model is studied and the behavior of dark energy's equation of state parameter indicates that it is matterlike in the early time of the universe but phantom-like in future.
Journal ArticleDOI
QCD ghost reconstruction of f(T) gravity in flat FRW universe
TL;DR: In this paper, a reconstruction scheme for f(T) gravity based on QCD ghost dark energy has been reported, and two realistic models have been obtained and the effective equations of state have been studied.
Journal ArticleDOI
On the Dynamics of Dark Energy with Higher Time Derivatives of Hubble Parameter in El-Nabulsi Fractional Action Cosmology
TL;DR: In this paper, a new dark energy density model which contains one term proportional to the Hubble parameter H squared, one to the first and one to second time derivative of the Hubble parameters H based on El-Nabulsi fractional action cosmology (FAC) was discussed.
Journal ArticleDOI
Viscous extended holographic Ricci dark energy in the framework of standard Eckart theory
TL;DR: In this paper, Kumar et al. reported a study on the viscous extended holographic Ricci dark energy (EHRDE) model under the assumption of existence of bulk viscosity in the linear barotropic fluid and the EHRDE in the framework of standard Eckart theory of relativistic irreversible thermodynamics and observed that the non-equilibrium bulk viscous pressure is significantly smaller than the local equilibrium pressure.
References
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Journal ArticleDOI
Dynamics of dark energy
TL;DR: In this article, the authors review the observational evidence for the current accelerated expansion of the universe and present a number of dark energy models in addition to the conventional cosmological constant, paying particular attention to scalar field models such as quintessence, K-essence and tachyon.
Journal ArticleDOI
Cosmological constant—the weight of the vacuum
TL;DR: A review of cosmological constants can be found in this paper, where the authors discuss several aspects of the Cosmological Constant problem from both cosmology and theoretical perspectives.
Journal ArticleDOI
Discovery of a supernova explosion at half the age of the Universe
Saul Perlmutter,Saul Perlmutter,Greg Aldering,M. Della Valle,S. Deustua,S. Deustua,Richard S. Ellis,Sebastien Fabbro,Andrew S. Fruchter,Gerson Goldhaber,Gerson Goldhaber,Donald E. Groom,I. M. Hook,A. G. Kim,A. G. Kim,M. Y. Kim,R. A. Knop,Christopher Lidman,Richard G. McMahon,Peter Nugent,Reynald Pain,Nino Panagia,C. R. Pennypacker,C. R. Pennypacker,Pilar Ruiz-Lapuente,Bradley E. Schaefer,N. A. Walton +26 more
TL;DR: The most distant spectroscopically confirmed supernova was reported in this paper, and it was found to be similar to nearby type Ia supernovae, which suggests that we may live in a low-mass-density universe.
Journal ArticleDOI
Discovery of a Supernova Explosion at Half the Age of the Universe and its Cosmological Implications
Saul Perlmutter,Greg Aldering,M. Della Valle,Susana E. Deustua,Richard S. Ellis,Sebastien Fabbro,A. S. Fruchter,G. Goldhaber,A. Goobar,D. E. Groom,I. M. Hook,A. G. Kim,M. Y. Kim,R. A. Knop,C. Lidman,R. G. McMahon,Peter Nugent,R. Pain,Nino Panagia,C. R. Pennypacker,P. Ruiz-Lapuente,B. E. Schaefer,Nicholas A. Walton +22 more
TL;DR: In this paper, the authors reported the discovery of a Type Ia supernova (SN 1997ap) at z = 0.83 at the Keck II 10m telescope.
Journal ArticleDOI
A model of holographic dark energy
TL;DR: In this article, a model for holographic dark energy is proposed, following the idea that the short distance cutoff is related to the infrared cut-off, and the model predicts the equation of state of the dark energy at the present time to be characterized by w = -0.90.
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