Results 61 to 70 of about 322,153 (182)

Gravitational leptogenesis [PDF]

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

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

Structural properties of a new class of stellar structures in modified teleparallel gravity

open access: yesFrontiers in Astronomy and Space Sciences, 2023
This paper explores new neutron star models based on spherically symmetric space–time. We take into account the gravitational effects of f(T,T) gravity, in which T is the torsion and T is the trace of the energy–momentum tensor.
Aylin Caliskan   +7 more
doaj   +1 more source

Motion of a rigid dumbbell with a flywheel in a central gravitational field

open access: yesRUDN Journal of Engineering Research, 2022
The article introduces theoretical studies of space flight of the dumbbell. A description of the general qualitative picture of the possibility of implementing the non-reactive principle of motion of an extended body in a central gravitational field is ...
Sergei A. Kupreev   +4 more
doaj   +1 more source

Routing in multi-sink sensor networks based on gravitation field

open access: yesTongxin xuebao, 2008
The process of data forwarding in sensor networks was analogy to electric charge moving in electrostatic field. By this analogy, a method which abstracted a sensor networks to a Gravitation Field was proposed.
doaj   +2 more sources

Extended Theories of Gravitation

open access: yesEPJ Web of Conferences, 2013
Extended theories of gravitation are naturally singled out by an analysis inspired by the Ehelers-Pirani-Schild framework. In this framework the structure of spacetime is described by a Weyl geometry which is enforced by dynamics.
Fatibene Lorenzo   +3 more
doaj   +1 more source

Lower-order zonal gravitational coefficients caused by zonal circulations inside gaseous planets: Convective flows and numerical comparison between modeling approaches

open access: yesEarth and Planetary Physics, 2020
To infer the internal equilibrium structure of a gaseous planet, especially the equation of state (EOS) and size of its inner core, requires accurate determination of lower-order zonal gravitational coefficients.
DaLi Kong, KeKe Zhang
doaj   +1 more source

Modified model of Newtonian gravitation.

open access: yesТонкие химические технологии, 2011
Within the limits of the classical mechanics for planets of the Solar system a new form of gravitational potential is suggested. The following effects are considered: perihelion advance of the planets, deviation of light beams in the field of the Sun ...
E. Kh. Nasretdinova, E. S. Savin
doaj  

Gravitational instantons

open access: yesClassical and Quantum Gravity, 1997
Gravitational instantons are solutions of the Einstein field equations with Euclidean signature and anti-selfdual curvature. In this letter, the authors try to add a little bit more to our knowledge of instantons by presenting new instanton solutions of the Einstein field equations, which they obtain by means of a reduction of the complex Monge-Ampère ...
Nutku, Y, Sheftel, MB, Malykh, AA
openaire   +3 more sources

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