Results 41 to 50 of about 250,232 (209)

Gravitational grating [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2018
9 pages, 6 ...
openaire   +2 more sources

Gravitating fluxbranes [PDF]

open access: yesPhysical Review D, 2001
We consider the effect that gravity has when one tries to set up a constant background form field. We find that in analogy with the Melvin solution, where magnetic field lines self-gravitate to form a flux-tube, the self-gravity of the form field creates fluxbranes.
openaire   +2 more sources

Gravitational Viscoelastodynamics

open access: yesActa Geodaetica et Geophysica Hungarica, 2002
We consider a compositionally and entropically stratified, compressible, rotating fluid earth and study gravitational-viscoelastic perturbations of its hydrostatic initial state. Using the Lagrangian representation and assuming infinitesimal perturbations, we deduce the incremental field equations and interface conditions of {\em gravitational ...
openaire   +6 more sources

Probing gravitation with pulsars

open access: yes, 2012
Radio pulsars are fascinating and extremely useful objects. Despite our on-going difficulties in understanding the details of their emission physics, they can be used as precise cosmic clocks in a wide-range of experiments -- in particular for probing ...
Kramer, Michael
core   +1 more source

Gravitational leptogenesis [PDF]

open access: yesJournal of Cosmology and Astroparticle Physics, 2007
4 pages, no ...
LAMBIASE, Gaetano, S. MOHANTY
openaire   +3 more sources

An Objective Classification Scheme for Solar-System Bodies Based on Surface Gravity

open access: yesGalaxies
We introduce succinct and objective definitions of the various classes of objects in the solar system. Unlike the formal definitions adopted by the International Astronomical Union in 2006, group separation is obtained from measured physical properties ...
Dimitris M. Christodoulou   +2 more
doaj   +1 more source

Extended Theories of Gravitation

open access: yes, 2016
In this paper we shall review the equivalence between Palatini$-f(\mathcal R)$ theories and Brans- Dicke (BD) theories at the level of action principles.
Fatibene, Lorenzo, Garruto, Simon
core   +1 more source

Gravitational lensing [PDF]

open access: yesProceedings of the National Academy of Sciences, 2013
Since Galileo, the arrays of lenses in telescopes have revolutionized the way we see planets, moons, and the universe. Now gravitational lenses made of warped spacetime are helping astronomers peer into the farthest corners of the cosmos.
openaire   +2 more sources

Exact and Slow-Roll Solutions for Exponential Power-Law Inflation Connected with Modified Gravity and Observational Constraints

open access: yesUniverse, 2020
We investigate the ability of the exponential power-law inflation to be a phenomenologically correct model of the early universe. We study General Relativity (GR) scalar cosmology equations in Ivanov–Salopek–Bond (or Hamilton–Jacobi like) representation ...
Igor Fomin, Sergey Chervon
doaj   +1 more source

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