Results 61 to 70 of about 69,354 (164)
Mass screening in modified gravity
Classical and Quantum Gravity, 2008 Models of modified gravity introduce extra degrees of freedom, which for consistency with the data, should be suppressed at observable scales. In the models that share properties of massive gravity such a suppression is due to nonlinear interactions: An isolated massive astrophysical object creates a halo of a nonzero curvature around it, shielding its
Gabadadze, Gregory, Iglesias, Alberto
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Ghost constraints on modified gravity [PDF]
Physics Letters B, 2005 7 pages; v2: typos ...
Nunez, Alvaro, Solganik, Slava
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Modified Gravity as Entropic Cosmology
UniverseThe present work reveals a direct correspondence between modified theories of gravity (cosmology) and entropic cosmology based on the thermodynamics of apparent horizon.
Shin’ichi Nojiri +3 more
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On holographic Rényi entropy in some modified theories of gravity
Journal of High Energy Physics, 2018 We perform a detailed analysis of holographic entanglement Rényi entropy in some modified theories of gravity with four dimensional conformal field theory duals.
Anshuman Dey +2 more
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, 2013 The recent observational data in cosmology seem to indicate that the universe is currently expanding in an accelerated way. An intriguing interpretation of these data is that they may just be signalling that Einstein's General Relativity is not the correct description of gravity when we consider distances of the order of the present horizon of the ...
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Deformed General Relativity and Quantum Black Holes Interior
Universe, 2020 Effective models of black holes interior have led to several proposals for regular black holes. In the so-called polymer models, based on effective deformations of the phase space of spherically symmetric general relativity in vacuum, one considers a ...
Denis Arruga +2 more
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Innermost stable circular orbit of Kerr-MOG black hole
European Physical Journal C: Particles and Fields, 2017 We study the innermost stable circular orbit (ISCO) of the metric of the Kerr black hole in modified gravity (Kerr-MOG black hole), which is one of the exact solutions of the field equation of modified gravity in the strong gravity regime.
Hyun-Chul Lee, Yong-Jin Han
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Cosmological Analysis of Modified Holographic Ricci Dark Energy in Chern-Simons Modified Gravity
Advances in High Energy Physics, 2019 In this paper, we study the cosmological analysis of the modified holographic Ricci dark energy model and reconstruct different scalar field models in the context of Chern-Simons modified gravity.
Sarfraz Ali, M. Jamil Amir
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Wave propagation in modified gravity
Physical Review D, 2016 We investigate the propagation of scalar waves induced by matter sources in the context of scalar-tensor theories of gravity which include screening mechanisms for the scalar degree of freedom. The usual approach when studying these theories in the non-linear regime of cosmological perturbations is based on the assumption that scalar waves travel at ...
Lindroos, Jan Ø. +2 more
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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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