Accelerating universe with decreasing gravitational constant
Sign Up to like & getrecommendations! Published in 2020 at "Journal of King Saud University - Science"
DOI: 10.1016/j.jksus.2019.11.042
Abstract: Abstract We study the cosmology of dark energy in an extended theory of gravity in Lyra’s geometry. By analyzing a possible phenomenological interaction between the matter field with a constant equation-of-state parameter ω m (… read more here.
Keywords: universe decreasing; gravitational constant; time; geometry ... See more keywords
Low-redshift tests of Newtonian cosmologies with a time-varying gravitational constant
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa2310
Abstract: In this work, we investigate Newtonian cosmologies with a time-varying gravitational constant, $G(t)$. We examine whether such models can reproduce the low-redshift cosmological observations without a cosmological constant, or any other sort of explicit dark… read more here.
Keywords: low redshift; gravitational constant; newtonian cosmologies; cosmologies time ... See more keywords
Effective Gravitational “Constant” in Scalar-(Curvature)Tensor and Scalar-Torsion Gravities
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DOI: 10.3390/universe3020037
Abstract: In theories where a scalar field couples nonminimally to gravity, the effective gravitational “constant” becomes dependent on the value of the scalar field. This note first gives a brief review on how the cosmological evolution… read more here.
Keywords: tensor scalar; gravitational constant; tensor; effective gravitational ... See more keywords
Progress in the Composite View of the Newton Gravitational Constant and Its Link to the Planck Scale
Sign Up to like & getrecommendations! Published in 2022 at "Universe"
DOI: 10.3390/universe8090454
Abstract: The Newtonian gravity constant G plays a central role in gravitational theory. Researchers have, since at least the 1980s, tried to see if the Newton gravitational constant can be expressed or replaced with more fundamental… read more here.
Keywords: gravitational constant; newton gravitational; progress composite; composite view ... See more keywords