94 citations · 479 across the 18 of their papers we have counts for
18 papers
Scrutinizing coupled vector dark energy in light of data
Wilmar Cardona, Jose L. Palacios-Córdoba, César A. Valenzuela-Toledo
Since current challenges faced by CDM might be hinting at new unravelled physics, here we investigate a plausible cosmological model where a vector field acts as source of dark…
Using machine learning to compress the matter transfer function
J. Bayron Orjuela-Quintana, Savvas Nesseris, Wilmar Cardona
The linear matter power spectrum connects theory with large scale structure observations in cosmology. Its scale dependence is entirely encoded in the matter transfer func…
Holographic energy density, dark energy sound speed, and tensions in cosmological parameters: and
Wilmar Cardona, M. A. Sabogal
Interesting discrepancies in cosmological parameters are challenging the success of the CDM model. Direct measurements of the Hubble constant using Cepheid variables and s…
Momentum transfer in the dark sector and lensing convergence in upcoming galaxy surveys
Wilmar Cardona, David Figueruelo
We investigated a cosmological model that allows a momentum transfer between dark matter and dark energy. The interaction in the dark sector mainly affects the behaviour of perturb…
An effective fluid description of scalar-vector-tensor theories under the sub-horizon and quasi-static approximations
Wilmar Cardona, J. Bayron Orjuela-Quintana, César A. Valenzuela-Toledo
We consider scalar-vector-tensor (SVT) theories with second-order equations of motion and tensor propagation speed equivalent to the speed of light. Under the sub-horizon and the q…
Cosmological constraints with the Effective Fluid approach for Modified Gravity
Wilmar Cardona, Rubén Arjona, Alejandro Estrada +1
Cosmological constraints of Modified Gravity (MG) models are seldom carried out rigorously. First, even though general MG models evolve differently (i.e., background and perturbati…