3 citations · 5 across the 4 of their papers we have counts for
7 papers
The genetic signature of (astronomically induced) life extinctions
Robersy Sanchez, Rolando Cardenas
The current understanding of supernova and gamma-ray burst events suggests important effects on the biosphere if one of more of them happened to strike the earth in the past. In th…
The evolution of density perturbations in two quintessence models
Tame Gonzalez, Rolando Cardenas
In this work we investigate the evolution of matter density perturbations for two different quintessence models. One of them is based on the Einstein theory of gravity, while the o…
A Model of the Universe including dark Energy
Rolando Cardenas, Tame Gonzalez, Osmel Martin +1
In this work we explore a model of the universe in which dark energy is modelled explicitely with both a dynamical quintessence field (with a double exponential self-interaction po…
Modelling dark energy with quintessence and a cosmological constant
Rolando Cardenas, Tame Gonzalez, Osmel Martin +1
In this talk we present a model of the universe in which dark energy is modelled explicitely with both a dynamical quintessence field and a cosmological constant. Our results confi…
Comments on the paper astro-ph/0103335 by C Rubano and P Scudellaro
Rolando Cardenas, Osmel Martin, Israel Quiros
We briefly comment on a paper by Rubano and Scudellaro [astro-ph/0103335] where they found general exact solutions for two classes of exponential potentials in a scalar field model…
Bouncing open universes embeddable in a distorted Randall-Sundrum brane scenario
Rolando Cardenas, I. Quiros, Rolando Bonal
In reference gr-qc/0104036 a four-dimensional effective theory of gravity embeddable in a five-dimensional "distorted" Randall-Sundrum brane scenario was derived. The present paper…