Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Salim, José M"'
We analyze the problem of gravitational collapse considering the matching of an exterior region described by the Vaidya's metric and an interior region described by a spherically symmetric shear-free inhomogeneous geometry sourced by a viscous fluid.
Externí odkaz:
http://arxiv.org/abs/1806.09433
Publikováno v:
JCAP 06 (2015) 013
In a previous work the authors have solved the Einstein equations of General Relativity for a class of metrics with constant spatial curvature, where it was found a non vanishing Weyl tensor in the presence of a primordial magnetic field with an anis
Externí odkaz:
http://arxiv.org/abs/1308.5178
By-now photons are the unique universal messengers. Cosmological sources like far-away galaxies or quasars are well-known light-emitters. Here we demonstrate that the nonlinear electrodynamics (NLED) description of photon propagation through the weak
Externí odkaz:
http://arxiv.org/abs/0710.5188
Publikováno v:
Europhys.Lett.77:19001,2007
The occurrence of the phenomenon known as photon acceleration is a natural prediction of nonlinear electrodynamics (NLED). This would appear as an anomalous frequency shift in any modeling of the electromagnetic field that only takes into account the
Externí odkaz:
http://arxiv.org/abs/astro-ph/0608538
Publikováno v:
Int.J.Mod.Phys.A21:43-55,2006
In 1936 Einstein predicted the phenomenon presently known as gravitational lensing (GL). A prime feature of GL is the magnification, because of the gravitational field, of the star visible surface as seen from a distant observer. We show here that no
Externí odkaz:
http://arxiv.org/abs/astro-ph/0408152
Publikováno v:
Mon.Not.Roy.Astron.Soc.354:L55-L59,2004
The idea that the nonlinear electromagnetic interaction, i. e., light propagation in vacuum, can be geometrized was developed by Novello et al. (2000) and Novello & Salim (2001). Since then a number of physical consequences for the dynamics of a vari
Externí odkaz:
http://arxiv.org/abs/astro-ph/0403045
Publikováno v:
Astrophys.J.608:925-929,2004
Currently is argued that the best method of determining the neutron star (NS) fundamental properties is by measuring the {\it gravitational redshift} ($z$) of spectral lines produced in the star photosphere. Measurement of $z$ at the star surface pro
Externí odkaz:
http://arxiv.org/abs/astro-ph/0307513
Akademický článek
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Publikováno v:
International Journal of Modern Physics A: Particles & Fields; Gravitation; Cosmology; Nuclear Physics; 1/10/2006, Vol. 21 Issue 1, p43-55, 13p, 2 Graphs
