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pro vyhledávání: '"Kling, Thomas"'
The light-rays and wave fronts in a flat class of Godel-type metric are examined to reveal the causality violating features of the space-time. Non-causal features demonstrated by the development of unusual wave front singularities are shown to be rel
Externí odkaz:
http://arxiv.org/abs/2005.03417
Publikováno v:
General Relativity and Gravitation (2019) 51:32
We examine the singularities of the wave fronts of null geodesics from point sources in the Kerr Metric. We find that the wave fronts develop a tube like structure that collapses non-symmetrically, leading to cusp features in the wave front singulari
Externí odkaz:
http://arxiv.org/abs/1903.00990
Publikováno v:
Gen Relativity Gravitation (2018) 50:7
We explore wave fronts of null geodesics in the Godel metric emitted from point sources both at, and away from, the origin. For constant time wave fronts emitted by sources away from the origin, we find cusp ridges as well as blue sky metamorphoses w
Externí odkaz:
http://arxiv.org/abs/1712.04092
Akademický článek
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Autor:
Kling, Thomas P., Aly, Aly
Using the Newman and Penrose spin coefficient (NP) formalism, we provide a derivation of the Dyer-Roeder equation for the angular diameter distance in cosmological space-times. We show that the geodesic deviation equation written in NP formalism is p
Externí odkaz:
http://arxiv.org/abs/1601.02475
Autor:
Frittelli, Simonetta, Kling, Thomas P.
The accuracy of mass estimates by gravitational lensing using the thin-lens approximation applied to Navarro-Frenk-White mass models with a soft truncation mechanism recently proposed by Baltz, Marshall and Oguri is studied. The gravitational lens sc
Externí odkaz:
http://arxiv.org/abs/1105.3783
Autor:
Kling, Thomas P., Bianchini, Louis
Publikováno v:
Gen.Rel.Grav.43:2575-2603,2011
Image distortion due to weak gravitational lensing is examined using a non-perturbative method of integrating the geodesic deviation and optical scalar equations along the null geodesics connecting the observer to a distant source. The method we deve
Externí odkaz:
http://arxiv.org/abs/1104.1687
Autor:
Kling, Thomas P., Campbell, Bryan
Publikováno v:
Phys.Rev.D77:123012,2008
Using the Newman and Penrose spin coefficient (NP) formalism, we examine the full Bianchi identities of general relativity in the context of gravitational lensing, where the matter and space-time curvature are projected into a lens plane perpendicula
Externí odkaz:
http://arxiv.org/abs/0806.2834
Autor:
Kling, Thomas P., Frittelli, Simonetta
Publikováno v:
Astrophys.J.675:115-125,2008
We examine the accuracy of strong gravitational lensing determinations of the mass of galaxy clusters by comparing the conventional approach with the numerical integration of the fully relativistic null geodesic equations in the case of weak gravitat
Externí odkaz:
http://arxiv.org/abs/0711.4977