Note on the evolution of the gravitational potential in Rastall scalar field theories
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In this paper, the evolution of the gravitational potential in Rastall scalar field theories is investigated, and it is shown that in a single component model a consistent perturbation theory, formulated in the Newtonian gauge, is possible only for γ = 1, which is the General Relativity limit.About:
This article is published in Physics Letters B.The article was published on 2012-05-15 and is currently open access. It has received 81 citations till now. The article focuses on the topics: Newtonian gauge & Scalar theories of gravitation.read more
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Rastall Cosmology and the ΛCDM Model
Carlos E. M. Batista,Mahamadou H. Daouda,Júlio C. Fabris,Oliver F. Piattella,Davi C. Rodrigues +4 more
TL;DR: In this article, a two-fluid model is introduced, one component representing vacuum energy whereas the other pressureless matter (e.g. baryons plus cold dark matter), and the cosmological scenario is the same as for the Lambda CDM model, both at background and linear perturbative levels.
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Rastall gravity is equivalent to Einstein gravity
TL;DR: This article showed that Rastall gravity is completely equivalent to the usual general relativity, and that the gravity sector is completely standard, based as usual on the Einstein tensor, while the matter sector corresponds to an artificially isolated part of the physical conserved stress energy.
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Black hole solutions surrounded by perfect fluid in Rastall theory
Yaghoub Heydarzade,Farhad Darabi +1 more
TL;DR: In this paper, the authors obtained uncharged∖charged Kiselev-like black holes as a new class of black hole solutions surrounded by perfect fluid in the context of Rastall theory.
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A generalization to the Rastall theory and cosmic eras
TL;DR: In this paper, a generalized version of the Rastall theory is proposed and a coupling between geometry and the pressureless matter fields is derived which may play the role of dark energy responsible for the current accelerating expansion phase.
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Thermodynamics of flat FLRW universe in Rastall theory
TL;DR: In this article, a relation for the apparent horizon entropy of a flat FLRW universe was obtained by using the Rastall theory and the Cai-Kim temperature, and the entropy positivity condition was imposed on the obtained relation.
References
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Particle dark matter: Evidence, candidates and constraints
TL;DR: The current status of particle dark matter, including experimental evidence and theoretical motivations, including direct and indirect detection techniques, is discussed in this paper. But the authors focus on neutralinos in models of supersymmetry and Kaluza-Klein dark matter in universal extra dimensions.
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Cosmological constant—the weight of the vacuum
TL;DR: A review of cosmological constants can be found in this paper, where the authors discuss several aspects of the Cosmological Constant problem from both cosmology and theoretical perspectives.
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An Alternative to quintessence
TL;DR: In this paper, the authors consider a FRW cosmological model with an exotic fluid known as Chaplygin gas and show that the resulting evolution of the universe is not in disagreement with the current observation of cosmic acceleration.
Book
Cosmological Inflation and Large-Scale Structure
Andrew R. Liddle,David H. Lyth +1 more
TL;DR: This textbook is the first to provide a modern and unified overview of inflationary cosmology and carefully compares predictions with the latest observations, including those of the cosmic microwave background, the clustering and velocities of galaxies and the epoch of structure formation.
Journal ArticleDOI
An alternative to quintessence
TL;DR: In this paper, the authors consider a FRW cosmological model with an exotic fluid known as Chaplygin gas and show that the resulting evolution of the universe is not in disagreement with the current observation of cosmic acceleration.