Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Jaume Carot"'
Publikováno v:
Entropy, Vol 25, Iss 9, p 1338 (2023)
We carry out a systematic study on the motion of test particles in the region inner to the naked singularity of a quasi-hyperbolically symmetric γ-metric. The geodesic equations are written and analyzed in detail. The obtained results are contrasted
Externí odkaz:
https://doaj.org/article/414145a1195c4db080ab5958ef77fd00
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
It is shown that exact spherically symmetric solutions to Einstein's field equations exist such that, over an open region of the spacetime, they are singularity free, satisfy the dominant energy condition, represent elastic matter with a well-defined
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41182041d2bf8c359311bc795523c6ea
We carry on a systematic study of the physical properties of axially symmetric fluid distributions, which appear to be geodesic, shear--free, irrotational, non--dissipative and purely electric, for the comoving congruence of observers, from the point
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::abac16cb463f78fa82c06ae973a12659
http://arxiv.org/abs/1806.01909
http://arxiv.org/abs/1806.01909
We report a study on axially and reflection symmetric dissipative fluids, just after its departure from hydrostatic and thermal equilibrium, at the smallest time scale at which the first signs of dynamic evolution appear. Such a time scale is smaller
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cee4a927140d93ff3713ba9f351850aa
Publikováno v:
General Relativity and Gravitation. 44:287-301
As pointed out right after equation (BCV-8) in [1], the symmetric energy-momentum tensor taking part in the Einstein field equations is the negative of the so-called canonical energy-momentum tensor (see also the paragraph following equation (BCV-6)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c30fe13bd8123c51e6fff2447ea74b74
https://doi.org/10.1007/s10714-011-1300-9
https://doi.org/10.1007/s10714-011-1300-9
Publikováno v:
International Journal of Theoretical Physics. 48:3537-3546
We calculate the instantaneous proper radial acceleration of test particles (as measured by a locally defined Lorentzian observer) in a Weyl spacetime, close to the horizon. As expected from the Israel theorem, there appear some bifurcations with res
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b0ef3b7a401a2233065960016e52af32
https://doi.org/10.1007/s10773-009-0159-y
https://doi.org/10.1007/s10773-009-0159-y
Publikováno v:
International Journal of Theoretical Physics
International Journal of Theoretical Physics, 2008, 47, pp.380-392. ⟨10.1007/s10773-007-9460-9⟩
International Journal of Theoretical Physics, 2008, 47, pp.380-392. ⟨10.1007/s10773-007-9460-9⟩
A study covering some aspects of the Einstein--Rosen metric is presented. The electric and magnetic parts of the Weyl tensor are calculated. It is shown that there are no purely magnetic E--R spacetimes, and also that a purely electric E--R spacetime
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1217605104bc640b8f9c04cc0d722b6c
https://doi.org/10.1007/s10773-007-9460-9
https://doi.org/10.1007/s10773-007-9460-9
Publikováno v:
Physical Review D. 91
Using a framework based on the 1+3 formalism we carry out a study on axially and reflection symmetric perfect and geodesic fluids, looking for possible models of sources radiating gravitational waves. Therefore, the fluid should be necessarily sheari
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d08a19e0c683af42c348792bf7ed1645
https://doi.org/10.1103/physrevd.91.024010
https://doi.org/10.1103/physrevd.91.024010
Using a framework based on the $1+3$ formalism we carry out a study on axially and reflection symmetric dissipative fluids, in the quasi--static regime. We first derive a set of invariantly defined "velocities", which allow for an inambiguous definit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c955b9a097d1380fda8a0083ea86819
Sobre o estado de publicação da comunicação consultar : http://www.worldscientific.com/doi/abs/10.1142/9789814623995_0113
We consider a static cylindrically symmetric spacetime with elastic matter and show that the Einstein field equations c
We consider a static cylindrically symmetric spacetime with elastic matter and show that the Einstein field equations c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1fc976e2f808be9a58e0dddfb703dc28
https://hdl.handle.net/1822/34211
https://hdl.handle.net/1822/34211