Results 1 to 10 of about 145,662,408 (160)

Tests of Lorentz Symmetry in the Gravitational Sector

open access: yesUniverse, 2016
Lorentz symmetry is one of the pillars of both General Relativity and the Standard Model of particle physics. Motivated by ideas about quantum gravity, unification theories and violations of CPT symmetry, a significant effort has been put the last ...
Aurélien Hees   +5 more
doaj   +3 more sources

Might the 2PN Perihelion Precession of Mercury Become Measurable in the Next Future?

open access: yesUniverse, 2023
The Hermean average perihelion rate ω˙2PN, calculated to the second post-Newtonian (2PN) order with the Gauss perturbing equations and the osculating Keplerian orbital elements, ranges from −18 to −4 microarcseconds per century μascty−1, depending on the
Lorenzo Iorio
doaj   +1 more source

Frame-Dragging in Extrasolar Circumbinary Planetary Systems

open access: yesUniverse, 2022
Extrasolar circumbinary planets are so called because they orbit two stars instead of just one; to date, an increasing number of such planets have been discovered with a variety of techniques.
Lorenzo Iorio
doaj   +1 more source

The Lense–Thirring Effect on the Galilean Moons of Jupiter

open access: yesUniverse, 2023
The perspectives of detecting the general relativistic gravitomagnetic Lense–Thirring effect on the orbits of the Galilean moons of Jupiter induced by the angular momentum S of the latter are preliminarily investigated.
Lorenzo Iorio
doaj   +1 more source

CONSTRAINING YUKAWA GRAVITY FROM PLANETARY MOTION IN THE SOLAR SYSTEM

open access: yesZbornik Radova: Geografski institut "Jovan Cvijić", 2019
In this work we used the observed additional perihelion precession in the Solar System, obtained from the observations of planets and spacecrafts, to study the possible existence of Yukawa correction term to the Newtonian gravitational potential.
Predrag Jovanović   +2 more
doaj   +3 more sources

Limitations in Testing the Lense–Thirring Effect with LAGEOS and the Newly Launched Geodetic Satellite LARES 2

open access: yesUniverse, 2023
The new geodetic satellite LARES 2, cousin of LAGEOS and sharing with it almost the same orbital parameters apart from the inclination, displaced by 180 deg, was launched last year. Its proponents suggest using the sum of the nodes of LAGEOS and of LARES
Lorenzo Iorio
doaj   +1 more source

The Flyby Anomaly in an Extended Whitehead’s Theory

open access: yesGalaxies, 2015
In this paper, we consider an extended version of Whitehead’s theory of gravity in connection with the flyby anomaly. Whitehead’s theory is a linear approximation defined in a background Minkowski spacetime, which gives the same solutions as standard ...
Luis Acedo
doaj   +1 more source

Constraints on Non-Standard Gravitomagnetism by the Anomalous Perihelion Precession of the Planets

open access: yesGalaxies, 2014
In 2008, a team of astronomers reported an anomalous retrograde precession of the perihelion of Saturn amounting to \(\Delta \dot{\omega}_{\mathrm{SATURN}}=-0.006(2)\) arcsec per century (arcsec cy\(^{-1}\)).
Luis Acedo
doaj   +1 more source

The Lingering Anomalous Secular Increase of the Eccentricity of the Orbit of the Moon: Further Attempts of Explanations of Cosmological Origin

open access: yesGalaxies, 2014
New analyses of extended data records collected with the Lunar Laser Ranging (LLR) technique performed with improved tidal models were not able to resolve the issue of the anomalous rate e ˙ of the eccentricity e of the orbit of the Moon, which is ...
Lorenzo Iorio
doaj   +1 more source

Measurement of Anomalous Forces From a Cooper-Pair Current in High-Tc Superconductors With Nano-Newton Precision

open access: yesFrontiers in Physics, 2022
Does a supercurrent drag space-time or generate a gravitational field that can be measured in a laboratory environment? A number of theories suggest that space-time itself could be modeled as a superfluid, so a current of Cooper-pairs might couple to its
M. Tajmar, O. Neunzig, M. Kößling
doaj   +1 more source

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