2012/09/11 by Antonella Cid, Pedro Labrana
Physics and Astronomy · #astro-ph.CO #gr-qc
paper · pdf · doi:10.1016/j.physletb.2012.09.022
14 pages, 7 figures. Accepted for publication in PLB
arxiv created 2012/09/11 · arxiv updated 2015/06/11
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.