Results 21 to 30 of about 69,216 (300)
Universe, 2022 Scalar Tensor Vector Gravity (STVG) or MOdified Gravity (MOG) is a metric theory of gravity with dynamical scalar fields and a massive vector field introduced in addition to the metric tensor.
Sreekanth Harikumar
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Mathematics, 2023 In this work, it is shown that the geometry of a gravity field generated by a spheroid with low eccentricity can be described with the help of a newly modified Helmholtz equation.
Gerassimos Manoussakis
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Modified gravity tomography [PDF]
Physics Letters B, 2012 7 pages, 1 figure, minor ...
Brax, P., Davis, A.-C., Li, B.
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Non-conserved modified gravity theory
European Physical Journal C: Particles and Fields, 2023 In the curved spacetime the conservation of stress-energy tensor $${\mathcal {T}}_{\,\,\,\,\, \mu ;\nu }^{\nu }=0$$ T μ ; ν ν = 0 has been questioned by Rastall. However, this idea in which $${\mathcal {T}}_{\,\,\,\,\, \mu ;\nu }^{\nu }=\lambda R_{,\mu }$
H. R. Fazlollahi
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Modified Gravity Theories on a Nutshell: Inflation, Bounce and Late-time Evolution [PDF]
, 2017 We systematically review some standard issues and also the latest developments of modified gravity in cosmology, emphasizing on inflation, bouncing cosmology and late-time acceleration era.
S. Nojiri +4 more
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Early modified gravity in light of the H0 tension and LSS data [PDF]
Physical Review D, 2020 We present a model of early modified gravity (EMG) consisting in a scalar field $\ensuremath{\sigma}$ with a nonminimal coupling to the Ricci curvature of the type ${M}_{\mathrm{pl}}^{2}+\ensuremath{\xi}{\ensuremath{\sigma}}^{2}$ plus a cosmological ...
M. Braglia +3 more
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A theory of type-II minimally modified gravity [PDF]
Journal of Cosmology and Astroparticle Physics, 2020 We propose a modified gravity theory that propagates only two local gravitational degrees of freedom and that does not have an Einstein frame. According to the classification in [2], this is a type-II minimally modified gravity theory.
A. D. Felice, and J D Doll, S. Mukohyama
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Modified gravity and the CMB [PDF]
Physical Review D, 2012 15 pages, 10 figures, published ...
Brax, Philippe, Davis, Anne-Christine
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Unified cosmic history in modified gravity: From F ( R ) theory to Lorentz non-invariant models [PDF]
, 2010 Classical generalization of general relativity is considered as gravitational alternative for unified description of the early-time inflation with late-time cosmic acceleration.
S. Nojiri, S. Odintsov
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Perturbations of Spinning Black Holes beyond General Relativity: Modified Teukolsky Equation
Physical Review X, 2023 The detection of gravitational waves from compact binary mergers by the LIGO/Virgo Collaboration has, for the first time, allowed for tests of relativistic gravity in the strong, dynamical, and nonlinear regime.
Dongjun Li +3 more
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