Constraints on Oscillating Quintom from Supernova, Microwave Background and Galaxy Clustering
Abstract
We consider in this paper a simple oscillating Quintom model of dark energy which has two free parameters and an equation of state oscillating and crossing 1. For low redshifts the equation of state of this model resembles itself similar to the linearly parametrized dark energy, however differs substantially at large redshifts. We fit our model to the observational data separately from the new high redshifts supernova observations from the HST/GOODS program and previous supernova, CMB and galaxy clustering. Our results show that because of the oscillating feature of our model the constraints from observations at large redshifts such as CMB become less stringent.
 Publication:

Modern Physics Letters A
 Pub Date:
 2005
 DOI:
 10.1142/S0217732305017445
 arXiv:
 arXiv:astroph/0411501
 Bibcode:
 2005MPLA...20.2409X
 Keywords:

 98.80.Cq;
 Particletheory and fieldtheory models of the early Universe;
 Astrophysics;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Phenomenology;
 High Energy Physics  Theory
 EPrint:
 4 pages, 6 figures Revtex4