Constraints on Oscillating Quintom from Supernova, Microwave Background and Galaxy Clustering

Details Constraints on Oscillating Quintom from Supernova, Microwave Background and Galaxy Clustering Constraints on Oscillating Quintom from Supernova, Microwave Background and Galaxy Clustering

2004-11-17

arxiv.org/abs/astro-ph/0411501v1

Mod.Phys.Lett.A20:2409-2416,2005

Astronomy and Astrophysics

Astrophysics

4 pages, 6 figures Revtex4

Scientific paper

10.1142/S0217732305017445

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 parameterized dark energy, however differ substantially at large redshifts. We fit our model to the observational data separately from the new high redshift 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.

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