Observational constraints on a cosmological model with Lagrange multipliers
Cosmology and Nongalactic Astrophysics
2015-06-11 v1 General Relativity and Quantum Cosmology
Abstract
Cosmological models with Lagrange multipliers are appealing because they could explain the behaviour of the dark sector in a unified way. In this work we analyse extensions to the "Dust of Dark Energy model" proposed in arXiv:1003.5751 by including spatial curvature and more general potentials of the scalar field. We perform dynamical system analysis and we determine the evolution of the equation of state parameter as a function of the scale factor. We present observational constraints on this model by using Union2.1 dataset and H(z) data.
Cite
@article{arxiv.1209.2339,
title = {Observational constraints on a cosmological model with Lagrange multipliers},
author = {Antonella Cid and Pedro Labrana},
journal= {arXiv preprint arXiv:1209.2339},
year = {2015}
}
Comments
14 pages, 7 figures. Accepted for publication in PLB