Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Maia, M. R. de Garcia"'
The cosmic no hair conjecture is tested for a large class of inhomogeneous cosmologies with a positive cosmological constant. Firstly, we derive a new class of exact inhomogeneous cosmological solutions whose matter content of the models is formed by
Externí odkaz:
http://arxiv.org/abs/0903.3449
Publikováno v:
Phys.Rev. D69 (2004) 123504
The possibility to avoid the cosmic initial singularity as a consequence of nonlinear effects on the Maxwell eletromagnetic theory is discussed. For a flat FRW geometry we derive the general nonsingular solution supported by a magnetic field plus a c
Externí odkaz:
http://arxiv.org/abs/astro-ph/0402311
Some cosmological consequences of first order quantum corrections to Maxwell electrodynamics are investigated in the context of a spatially flat homogeneous and isotropic universe driven by a magnetic field plus a cosmological term $\Lambda$. For a v
Externí odkaz:
http://arxiv.org/abs/astro-ph/9902380
Publikováno v:
Phys.Rev. D60 (1999) 123510
Extending previous results [Phys. Rev.D {\bf 56}, 6351 (1997)], we estimate the back reaction of cosmological gravitons in the expansion dynamics, during the matter age. Tensor perturbations with scales larger than the Hubble radius are created due t
Externí odkaz:
http://arxiv.org/abs/astro-ph/9902338
Autor:
Maia, M. R. de Garcia, Lima, J. A. S.
Publikováno v:
Phys.Rev. D54 (1996) 6111-6121
The problem of cosmological graviton creation for homogeneous and isotropic universes with elliptical ($\vae =+1$) and hyperbolical ($\vae =-1$) geometries is addressed. The gravitational wave equation is established for a self-gravitating fluid sati
Externí odkaz:
http://arxiv.org/abs/gr-qc/9606032