Zobrazeno 1 - 10
of 251
pro vyhledávání: '"Letelier, P. S."'
Publikováno v:
Int. J. Mod. Phys. D 20, 2291 (2011)
Relativistic thick ring models are constructed using previously found analytical Newtonian potential-density pairs for flat rings and toroidal structures obtained from Kuzmin-Toomre family of discs. In particular, we present systems with one ring, tw
Externí odkaz:
http://arxiv.org/abs/1401.7884
Publikováno v:
Gen. Relativ. Gravit. (2014) 46:1641
We construct a class of static, axially symmetric solutions representing razor-thin disks of matter in an Integrable Weyl-Dirac theory proposed in Found. Phys. 29, 1303 (1999). The main differences between these solutions and the corresponding genera
Externí odkaz:
http://arxiv.org/abs/1305.2662
Autor:
Pitelli, J. P. M., Letelier, P. S.
Publikováno v:
General Relativity and Gravitation, 2013
It is well known that the canonical quantization of the Friedmann-Lema\^itre-Robertson-Walker (FLRW) filled with a perfect fluid leads to nonsingular universes which, for later times, behave as their classical counterpart. This means that the expecta
Externí odkaz:
http://arxiv.org/abs/1107.5802
Autor:
Letelier, Patricio. S.
We study a noncovariant theory of gravitation based on the Lagrangian density $\sqrt{-g})^\omega R$, where $\omega$ is a constant. In particular, we study solutions that for $\omega=1$ reduces to the de Sitter, Kasner and LFRW (with perfect fluid wit
Externí odkaz:
http://arxiv.org/abs/1105.3208
Publikováno v:
Mon.Not.Roy.Astron.Soc. 414, 3105-3116 (2011)
We study the motion of test particles around a center of attraction represented by a monopole (with and without spheroidal deformation) surrounded by a ring, given as a superposition of Morgan & Morgan discs. We deal with two kinds of bounded orbits:
Externí odkaz:
http://arxiv.org/abs/1103.4616
Publikováno v:
Astrophysics and Space Science 332, 325-329 (2011)
We look for particular solutions to the restricted three-body problem where the bodies are allowed to either lose or gain mass to or from a static atmosphere. In the case that all the masses are proportional to the same function of time,we find analo
Externí odkaz:
http://arxiv.org/abs/1103.3193
We review our contribution to infrared Renormalization Group (RG) effects to General Relativity in the context of galaxies. Considering the effective action approach to Quantum Field Theory in curved background, we argued that the proper RG energy sc
Externí odkaz:
http://arxiv.org/abs/1102.2188
Autor:
Vogt, D., Letelier, P. S.
Publikováno v:
MNRAS, 411, 2371 (2011)
A method is presented to bend a thin massive line when the curvature is small. The procedure is applied to a homogeneous thin bar with two types of curvatures. One of them mimics a galactic bar with two spiral arms at its tips. It is showed that if t
Externí odkaz:
http://arxiv.org/abs/1012.5576
Autor:
Letelier, P. S., Pitelli, J. P. M.
Publikováno v:
Phys.Rev.D82:104046,2010
We introduce the formalism of quantum cosmology in a Friedmann-Lema\^itre-Robertson-Walker (FLRW) universe of arbitrary dimension filled with a perfect fluid with $p=\alpha\rho$ equation of state. First we show that the Schutz formalism, developed in
Externí odkaz:
http://arxiv.org/abs/1010.3054
Autor:
Pitelli, J. P. M., Letelier, P. S.
Publikováno v:
Int.J.Mod.Phys.D20:729-743,2011
We review the mathematical framework necessary to understand the physical content of quantum singularities in static spacetimes. We present many examples of classical singular spacetimes and study their singularities by using wave packets satisfying
Externí odkaz:
http://arxiv.org/abs/1010.3052