M Amarzguioui et al JCAP01(2005)008 doi:10.1088/1475-7516/2005/01/008
Combined constraints on Cardassian models from supernovae, cosmic microwave background and large scale structure observations
M Amarzguioui1, Ø Elgarøy1,2 and T Multamäki2
Show affiliationsWe confront Cardassian models with recent observational data. These models can be viewed either as purely phenomenological modifications of the Friedmann equation, or as arising from cosmic fluids with non-standard properties. In the first case, we find that the models are consistent with the data for a wide range of parameters but no significant preference over the Λ CDM model is found. In the latter case we find that the fact that the sound speed is non-zero in these models makes them inconsistent with the galaxy power spectrum from the Sloan Digital Sky Survey.
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Issue 01 (January 2005)
Received 18 October 2004, accepted for publication 20 December 2004
Published 13 January 2005
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Combined constraints on Cardassian models from supernovae, cosmic microwave background and large scale structure observations
M Amarzguioui et al JCAP01(2005)008
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