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10 papers · 1 filter
The Three-Dimensional BTZ Black Hole as a Cylindrical System in Four-Dimensional General Relativity
José P. S. Lemos, Vilson T. Zanchin
It is shown how to transform the three dimensional BTZ black hole into a four dimensional cylindrical black hole (i.e., black string) in general relativity. This process is identic…
A Tolman Surface Brightness Test for Universal Expansion, and the Evolution of Elliptical Galaxies in Distant Clusters
M. A. Pahre, S. G. Djorgovski, R. R. de Carvalho
We use the intercept of the elliptical galaxy radius--surface brightness (SB) relation at a fixed metric radius as the standard condition for the Tolman SB test of the universal ex…
Rotating Charged Black Strings in General Relativity
José P. S. Lemos, Vilson T. Zanchin
Einstein-Maxwell equations with a cosmological constant are analyzed in a four dimensional stationary spacetime admitting in addition a two dimensional group of spatial isome…
The Near-Infrared Fundamental Plane of Elliptical Galaxies
M. A. Pahre, S. G. Djorgovski, R. R. de Carvalho
We present results from a near-infrared -band imaging survey of 59 elliptical galaxies in five nearby clusters. We measure photometric parameters for each galaxy using surface p…
Dynamic wormholes and Energy Conditions
Anzhong Wang, Patricio S. Letelier
A class of exact solutions of the Einstein field equations representing non-static wormholes that obey the {\em weak and dominant energy conditions } is presented. Hence, in princi…
On the Geometry of Planar Domain Walls
F. M. Paiva, Anzhong Wang
The Geometry of planar domain walls is studied. It is argued that the planar walls indeed have plane symmetry. In the Minkowski coordinates the walls are mapped into revolution par…