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THERMODYNAMICS IN MODIFIED GRAVITY THEORIES [PDF]
International Journal of Modern Physics D, 2011 We demonstrate that there exists an equilibrium description of thermodynamics on the apparent horizon in the expanding cosmological background for a wide class of modified gravity theories with the Lagrangian density f(R,ϕ,X), where R is the Ricci scalar and X is the kinetic energy of a scalar field ϕ.
Bamba, Kazuharu +2 more
openaire +2 more sources
Nonderivative modified gravity: a classification [PDF]
Journal of Cosmology and Astroparticle Physics, 2014 No ...
Comelli D, Nesti F, PILO, LUIGI
openaire +6 more sources
Testing modified gravity at cosmological distances with LISA standard sirens [PDF]
Journal of Cosmology and Astroparticle Physics, 2019 Modifications of General Relativity leave their imprint both on the cosmic expansion history through a non-trivial dark energy equation of state, and on the evolution of cosmological perturbations in the scalar and in the tensor sectors.
E. Belgacem +20 more
semanticscholar +1 more source
Introduction to Modified Gravity [PDF]
SpringerBriefs in Physics, 2020 This paper is a collection of lecture notes on modified gravity. Various modified gravity models formulated within the Riemannian formalism are discussed.
A. Petrov
semanticscholar +1 more source
Asymptotically flat vacuum solution for a rotating black hole in a modified gravity theory
European Physical Journal C: Particles and Fields, 2022 The theory of f(R)-gravity is one of the theories of modified Einstein gravity. The vacuum solution, on the other hand, of the field equation is the solution for black hole geometry.
Arghya Ranjan Das +1 more
doaj +1 more source
Cosmic voids in modified gravity models with massive neutrinos [PDF]
, 2020 Cosmic voids are progressively emerging as a new viable cosmological probe. Their abundance and density profiles are sensitive to modifications of gravity, as well as to dark energy and neutrinos.
S. Contarini +5 more
semanticscholar +1 more source
International Journal of Modern Physics D, 2008 We describe how a certain simple modification of general relativity, in which the local cosmological constant is allowed to depend on the space–time curvature, predicts the existence of halos of modified gravity surrounding spherically symmetric objects. We show that the gravitational mass of an object weighed together with its halo can be much larger
Krasnov, Kirill, Shtanov, Yuri
openaire +3 more sources
Dark matter = modified gravity? Scrutinising the spacetime–matter distinction through the modified gravity/ dark matter lens [PDF]
, 2020 This paper scrutinises the tenability of a strict conceptual distinction between space(time) and matter via the lens of the debate between modified gravity and dark matter.
N. Martens, Dennis Lehmkuhl
semanticscholar +1 more source
Modeling Human Perception of Orientation in Altered Gravity
Frontiers in Systems Neuroscience, 2015 Altered gravity environments, such as those experienced by astronauts, impact spatial orientation perception and can lead to spatial disorientation and sensorimotor impairment.
Torin K. Clark +5 more
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Editorial to the Special Issue “Probing New Physics with Black Holes”
Universe, 2020 Black holes are fantastic laboratories for probing new physics. Both theoretically and experimentally, many new ideas are emerging to use them as tools for understanding better quantum gravity or classical gravity beyond general relativity.
Aurélien Barrau
doaj +1 more source