635 citations · 6.4k across the 144 of their papers we have counts for
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Observational constraints on the dark energy and dark matter mutual coupling
Chang Feng, Bin Wang, Elcio Abdalla +1
We examine different phenomenological interaction models for Dark Energy and Dark Matter by performing statistical joint analysis with observational data arising from the 182 Gold…
Interacting Dark Energy and Dark Matter: observational Constraints from Cosmological Parameters
Bin Wang, Jiadong Zang, Chi-Yong Lin +2
Several observational constraints are imposed on the interacting holographic model of Dark Energy and Dark Matter. First we use the age parameter today, as given by the WMAP result…
Entropy and holography constraints for inhomogeneous universes
Bin Wang, Elcio Abdalla, Takeshi Osada
We calculated the entropy of a class of inhomogeneous dust universes. Allowing spherical symmetry, we proposed a holographic principle by reflecting all physical freedoms on the su…
Scale Invariance in a Perturbed Einstein-de Sitter Cosmology
Elcio Abdalla, Roya Mohayaee, Marcelo B. Ribeiro
This paper seeks to check the validity of the "apparent fractal conjecture" (Ribeiro 2001ab: gr-qc/9909093, astro-ph/0104181), which states that the observed power-law behaviour fo…
Gravitational instabilities and faster evolving density perturbations
Elcio Abdalla, Roya Mohayaee
The evolution of inhomogeneities in a spherical collapse model is studied by expanding the Einstein equation in powers of inverse radial parameter. In the linear regime, the densit…
Gravitational Clustering to All Perturbative Orders
Elcio Abdalla, Roya Mohayaee
We derive the time evolution of the density contrast to all orders of perturbation theory, by solving the Einstein equation for scale-invariant fluctuations. These fluctuations are…