Late time cosmic acceleration in modified Sáez–Ballester theory
Sign Up to like & getrecommendations! Published in 2020 at "Physics of the Dark Universe"
DOI: 10.1016/j.dark.2019.100446
Abstract: We establish an extended version of the modified Saez-Ballester (SB) scalar-tensor theory in arbitrary dimensions whose energy momentum tensor as well as potential are pure geometrical quantities. This scenario emerges by means of two scalar… read more here.
Keywords: cosmic acceleration; theory; tensor; time cosmic ... See more keywords
Probing cosmic acceleration by strong gravitational lensing systems
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz286
Abstract: Recently, some divergent conclusions about cosmic acceleration were obtained using Type Ia supernovae (SNe Ia), with opposite assumptions on the intrinsic luminosity evolution. In this paper, we use strong gravitational lensing systems to probe the… read more here.
Keywords: strong gravitational; cosmic acceleration; lensing systems; gravitational lensing ... See more keywords
Model-Independent Predictions for Smooth Cosmic Acceleration Scenarios
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DOI: 10.1103/physrevd.98.043537
Abstract: Through likelihood analyses of both current and future data that constrain both the expansion history of the universe and the clustering of matter fluctuations, we provide falsifiable predictions for three broad classes of models that… read more here.
Keywords: cosmic acceleration; predictions smooth; model independent; independent predictions ... See more keywords
Cosmic acceleration in unimodular gravity
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DOI: 10.1103/physrevd.99.123525
Abstract: We study unimodular gravity in the context of cosmology, particularly some interesting consequences that might be able to describe the background cosmology and the late cosmic acceleration. We focus our attention on the hypothesis of… read more here.
Keywords: acceleration unimodular; unimodular gravity; cosmic acceleration; cosmology ... See more keywords
Interacting dark matter and cosmic acceleration
Sign Up to like & getrecommendations! Published in 2020 at "European Physical Journal C"
DOI: 10.1140/epjc/s10052-020-08443-4
Abstract: We study the effect of an explicit interaction between two scalar fields components describing dark matter in the context of a recent proposal framework for interaction. We find that, even assuming a very small coupling,… read more here.
Keywords: matter cosmic; cosmic acceleration; matter; dark matter ... See more keywords