Work

Large-scale structure and the Cardassian fluid

Year: 2006

Type: article

Abstract: In this paper, we confront the predictions of the power law Cardassian model for the baryon power spectrum with the observations of the SDSS galaxy survey. We show that they fit only for very unusual values of the cold dark matter or baryon density parameters, the Hubble parameter or the spectral index of the initial power spectrum. Moreover, the best-fit Cardassian models turn out to be phantom models. If one wants to recover the usual values for these constants, as quoted by the WMAP team, the power law Cardassian model turns out to be indistinguishable from a ΛCDM model.

Source: Astronomy and Astrophysics

DOI: 10.1051/0004-6361:20064965

Authors: S. Fay, M. Amarzguioui

Institutions: Queen Mary University of London, Observatoire de Paris, Laboratoire Univers et Théories, University of Oslo

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: European Commission, Norges Forskningsråd

OpenAlex ID: W2020190688