314 citations · 1.3k across the 15 of their papers we have counts for
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Internal space structure generalization of the quintom cosmological scenario
Luis P. Chimento, Mónica Forte, Ruth Lazkoz +1
We introduce the Lagrangian for a multi-scalar field configuration in a -dimensional internal space endowed with a constant metric and generalize the quintom cosmologic…
Comparison of Standard Ruler and Standard Candle constraints on Dark Energy Models
R. Lazkoz, S. Nesseris, L. Perivolaropoulos
We compare the dark energy model constraints obtained by using recent standard ruler data (Baryon Acoustic Oscillations (BAO) at z=0.2 and z=0.35 and Cosmic Microwave Background (C…
Geometrical constraints on dark energy models
Ruth Lazkoz
This contribution intends to give a pedagogical introduction to the topic of dark energy (the mysterious agent supposed to drive the observed late time acceleration of the Universe…
Chaplygin DGP cosmologies
Mariam Bouhmadi-López, Ruth Lazkoz
A new class of braneworld models displaying late-time phantom acceleration without resorting to a phantom fluid is presented. In this scenario expansion is fuelled by dark matter t…
Cosmological constraints combining H(z), CMB shift and SNIa observational data
Ruth Lazkoz, Elisabetta Majerotto
Recently H(z) data obtained from differential ages of galaxies have been proposed as a new geometrical probe of dark energy. In this paper we use those data, combined with other ba…
Quintom cosmologies with arbitrary potentials
Ruth Lazkoz, Genly León, Israel Quiros
In this paper we investigate quintom cosmologies with arbitrary potentials from the dynamical systems perspective. The dynamical systems analysis is complete in the sense that it i…