Results 21 to 30 of about 1,592 (93)

Inercia con fuentes materiales en la dinámica de partículas

open access: yesCiencia e Ingeniería Neogranadina, 2007
Durante los años de gestación de la Teoría General de la Relatividad (TGR) y de la subsiguiente cosmología relativista, Albert Einstein esperaba que su teoría de gravitación satisficiera las ideas de Mach sobre la inercia.
Favio Ernesto Cala Vitery   +1 more
doaj   +1 more source

La gravitación cubana de la estrella de David

open access: yesComparative Cultural Studies, 2021
The development of the Jewish community in Cuba is link by the international context of the contemporary history that stimulates the mobility of the Abraham people to the biggest Caribbean island.
Luis Edel Abreu Veranes   +1 more
doaj   +1 more source

Gravitación Universal [PDF]

open access: yes, 2020
Este recurso tiene como finalidad realizar un recorrido histórico y estudiar los aportes de Kepler y Newton y otras aplicaciones relacionadas con el estudio de la gravitación ...
Irizaga, Florencia   +2 more
core  

Agujeros negros en teorías de gravitación con altas derivadas [PDF]

open access: yes, 2021
El objetivo principal de este trabajo consiste en analizar la existencia o no desingularidades en las soluciones de diversas teorías de gravitación con más derivadasque la teoría de Einstein.
Pardina García, Miguel   +1 more
core  

Interacting Ricci-Type Holographic Dark Energy and Dark Sector Couplings

open access: yesPhysics
We investigate cosmological scenarios in a spatially flat Friedmann–Lemaître–Robertson–Walker (FLRW) universe containing Ricci-type holographic dark energy within the framework of general relativity.
Carlos Rodriguez-Benites   +10 more
doaj   +1 more source

Gravitational-Wave Instabilities in Rotating Compact Stars

open access: yesGalaxies, 2022
It is generally accepted that the limit on the stable rotation of neutron stars is set by gravitational-radiation reaction (GRR) driven instabilities, which cause the stars to emit gravitational waves that carry angular momentum away from them.
Eric L. Bratton   +5 more
doaj   +1 more source

Quantum fields during black hole formation: how good an approximation is the Unruh state?

open access: yesJournal of High Energy Physics, 2018
We study the quantum effects of a test Klein-Gordon field in a Vaidya space-time consisting of a collapsing null shell that forms a Schwazschild black hole, by explicitly obtaining, in a (1 + 1)-dimensional model, the Wightman function, the renormalised ...
Benito A. Juárez-Aubry, Jorma Louko
doaj   +1 more source

Dinámica del sistema solar y sus posibles efectos en eventos meteorológicos extremos en México

open access: yesTecnología y ciencias del agua
La rotación de la Tierra es inconstante, el eje de dirección y la velocidad cambian con el tiempo, por lo que la duración del día (LOD) experimenta cambios de milisegundos; dicha velocidad influye en el clima terrestre.
Daniel Mendoza-Cariño   +2 more
doaj   +1 more source

Phases of Hadron-Quark Matter in (Proto) Neutron Stars

open access: yesUniverse, 2019
In the first part of this paper, we investigate the possible existence of a structured hadron-quark mixed phase in the cores of neutron stars. This phase, referred to as the hadron-quark pasta phase, consists of spherical blob, rod, and slab rare phase ...
Fridolin Weber   +6 more
doaj   +1 more source

Pfaffian Systems, Cartan Connections, and the Null Surface Formulation of General Relativity

open access: yesUniverse
This review examines the role of differential forms, Pfaffian systems, and hypersurfaces in general relativity. These mathematical constructions provide the essential tools for general relativity, in which the curvature of spacetime—described by the ...
Emanuel Gallo, Carlos Kozameh
doaj   +1 more source

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