Results 31 to 40 of about 166,028,825 (289)
Entropy, 2012 Along this review, we focus on the study of several properties of modified gravity theories, in particular on black-hole solutions and its comparison with those solutions in General Relativity, and on Friedmann–Lemaˆıtre–Robertson–Walker metrics.
Diego Sáez-Gómez +1 more
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European Physical Journal C: Particles and Fields, 2021 We develop an approach to the theory of relativistic geometric flows and emergent gravity defined by entropy functionals and related statistical thermodynamics models. Nonholonomic deformations of G.
Sergiu I. Vacaru +2 more
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Living Reviews in Relativity, 2018 Theories of modified gravity, where light scalars with non-trivial self-interactions and non-minimal couplings to matter—chameleon and symmetron theories—dynamically suppress deviations from general relativity in the solar system.
Clare Burrage, Jeremy Sakstein
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Cosmological bound from the neutron star merger GW170817 in scalar–tensor and F(R) gravity theories
Physics Letters B, 2018 We consider the evolution of cosmological gravitational waves in scalar–tensor theory and F(R) gravity theory as typical models of the modified gravity. Although the propagation speed is not changed from the speed of light, the propagation phase changes ...
Shin'ichi Nojiri, Sergei D. Odintsov
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European Physical Journal C: Particles and Fields, 2020 The strong gravitational field near massive blackhole is an interesting regime to test General Relativity (GR) and modified gravity theories. The knowledge of spacetime metric around a blackhole is a primary step for such tests.
Utkarsh Kumar +2 more
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The integrated bispectrum in modified gravity theories [PDF]
Journal of Cosmology and Astroparticle Physics, 2017 26 pages, 6 ...
openaire +4 more sources
Radion tunneling in modified theories of gravity
European Physical Journal C: Particles and Fields, 2018 We consider a five dimensional warped spacetime where the bulk geometry is governed by higher curvature F(R) gravity. In this model, we determine the modulus potential originating from the scalar degree of freedom of higher curvature gravity.
Tanmoy Paul, Soumitra SenGupta
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Halo modelling in chameleon theories [PDF]
, 2014 We analyse modelling techniques for the large-scale structure formed in scalar-tensor theories of constant Brans-Dicke parameter which match the concordance model background expansion history and produce a chameleon suppression of the gravitational ...
Lombriser, Lucas +5 more
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New classes of modified teleparallel gravity models
Physics Letters B, 2017 New classes of modified teleparallel theories of gravity are introduced. The action of this theory is constructed to be a function of the irreducible parts of torsion f(Tax,Tten,Tvec), where Tax,Tten and Tvec are squares of the axial, tensor and vector ...
Sebastian Bahamonde +2 more
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The Open Journal of Astrophysics, 2023 We propose to use Self-Organizing Maps (SOM) to map the impact of physical models onto observables. Using this approach, we are able to determine how theories relate to each other given their signatures.
Agnès Ferté +6 more
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