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Rastall Cosmology and the \Lambda CDM Model

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arxiv 1112.4141 v2 pith:WYQAWKU3 submitted 2011-12-18 astro-ph.CO gr-qc

Carlos E. M. Batista , Mahamadou H. Daouda , Júlio C. Fabris , Oliver F. Piattella , Davi C. Rodrigues This is my paper · ORCID
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keywords modeldarkenergylambdamatterperturbativerastalltheory
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Rastall's theory is based on the non-conservation of the energy-momentum tensor. We show that, in this theory, if we introduce a two-fluid model, one component representing vacuum energy whereas the other pressureless matter (e.g. baryons plus cold dark matter), the cosmological scenario is the same as for the \Lambda CDM model, both at background and linear perturbative levels, except for one aspect: now dark energy may cluster. We speculate that this can lead to a possibility of distinguishing the models at the non-linear perturbative level.

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Cited by 2 Pith papers

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  2. Exploring Hubble Tension Alleviation through Neutrino-Coupled Perturbed $f(R)$ Gravity

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    A fit of Hu-Sawicki f(R) gravity with a fitted neutrino interaction to CMB, lensing, BAO, CC, and Pantheon data returns H0 near 70 km/s/Mpc, partially easing but not resolving the Hubble and S8 tensions.

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