Cardassian Universe Constrained by Latest Observations

Details Cardassian Universe Constrained by Latest Observations Cardassian Universe Constrained by Latest Observations

2009-12-24

arxiv.org/abs/0912.4793v1

Phys. Lett. B692:152-156, 2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

10 pages, 3 figures

Scientific paper

10.1016/j.physletb.2010.07.028

Several Cardassian universe models including the original, modified polytropic and exponential Cardassian models are constrained by the latest Constitution Type Ia supernova data, the position of the first acoustic peak of CMB from the five years WMAP data and the size of baryonic acoustic oscillation peak from the SDSS data. Both the spatial flat and curved universe are studied, and we also take account of the possible bulk viscosity of the matter fluid in the flat universe case.

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