34 citations · 97 across the 7 of their papers we have counts for
5 papers · 1 filter
Coupled Multi Scalar Field Dark Energy
J. Alberto Vázquez, David Tamayo, Gabriela Garcia-Arroyo +3
The main aim of this paper is to present the multi scalar field components as candidates to be the dark energy of the universe and their observational constraints. We start with th…
Fourier-series expansion of the dark-energy equation of state
David Tamayo, J. Alberto Vazquez
The dark energy component of the universe still remains as a mystery, however, several papers based on observational data have shown that its equation of state may have an oscillat…
Non-linear coupling in the dark sector as a running vacuum model
Josue De-Santiago, Iván E. Sánchez G., David Tamayo
In this work we study a phenomenological non-gravitational interaction between dark matter and dark energy. The scenario studied in this work extends the usual interaction model pr…
Primordial Gravitational Waves in Running Vacuum Cosmologies
D. A. Tamayo, J. A. S. Lima, M. E. S. Alves +1
We investigate the cosmological production of gravitational waves in a nonsingular flat cosmology powered by a "running vacuum" energy density described by , a phe…
Production of primordial gravitational waves in a simple class of running vacuum cosmologies
D. A. Tamayo, J. A. S. Lima, D. F. A. Bessada
The problem of cosmological production of gravitational waves is discussed in the framework of an expanding, spatially homogeneous and isotropic FRW type Universe with time-evolvin…