Antipodal Identification in the Schwarzschild Spacetime

"Through a Möbius transformation, we study aspects like topology, ligth cones, horizons, curvature singularity, lines of constant Schwarzschild coordinates r and t, null geodesics, and transformed metric, of the spacetime (SKS/2)^' that results from: i) the antipode identification in the Schwarzschild-Kruskal-Szekeres (SKS) spacetime, and ii) the suppression of the consequent conical singularity. In particular, one obtains a non simply-connected topology: (SKS/2)^' = R^2* ×S^2 and, as expected, bending light cones."

Studi Eksperimental Kuat Lentur Baja Ringan Profil C Sebagai Komponen Rangka Atap

Cold frame is one of the alternatives to address the problem of the durability of the wood, but cold frame has a number of drawbacks, namely the high gravity, not easy in the manufacture of large span and require extra supervision strictly in its implementation and to make it. The purpose of this study is to analyze how big the power supple of profile C75.75.0,75 mild steel from three different products. Expect in this research, profile C-steel light can be used as a replacement of the roof frame of timber and concrete without overriding the power of the light steel profile C. From the results obtained as a result of the strong bending light steel C profile of each product. Powerful bending light steel profile C75.75.0,75 product Chi-Chi with span 1 m produced deflection of 14.7833 mm, the maximum load amounted to 86.8000 Kg and elastic tension of 1.0914 Kg/mm2, whereas in the span of 1.5 m with the same products and specifications the resulting deflection of 52.9533 mm, the maximum load of 80.0000 Kg and elastic tension of 1.0508 Kg/mm2. Powerful bending light steel profile C75.75.0,75 1 m span Truss with products generated deflection of 20.7600 mm, the maximum load amounted to 151.3333 Kg and elastic tension of 1.9512 Kg/mm2, whereas in the span of 1.5 m with the same products and specifications the resulting deflection of 43.6767 mm, the maximum load amounted to 126.3333 Kg and elastic tension of 1.4567 Kg/mm2. Powerful bending light steel profile C75.75.0 .75 product Kaso with span 1 m produced deflection of 21.0133 mm, the maximum load amounted to 164.0000 Kg and elastic tension of 2.1129 Kg/mm2, whereas in the span of 1.5 m with the same products and specifications the resulting deflection of maximum load 43.3333 mm amounted to 110.3333 Kg and elastic tension of 1.4379 Kg/mm2.

Gravitational Lensing of Charged Ayon-Beato-Garcia Black Holes and Nonlinear Effects of Maxwell Fields

Nonsingular Ayon-Beato-Garcia (ABG) spherically symmetric static black hole (BH) with charge to mass ratio q=g/2m is metric solution of Born Infeld nonlinear Maxwell-Einstein theory. Central region of the BH behaves as (anti-)de Sitter for (|q|>1) |q|<1. In the case where |q|=1, the BH central region behaves as Minkowski flat metric. Nonlinear Electromagnetic (NEM) fields counterpart causes deviation of light geodesics and so light rays will be forced to move on from effective metric. In this paper we study weak and strong gravitational lensing of light rays by seeking effects of NEM fields counterpart on image locations and corresponding magnification. We set our calculations to experimentally observed Sgr A⁎ BH. In short we obtained the following: for large distances, the NEM counterpart is negligible and it reduces to linear Maxwell fields. The NEM field enlarges radius of the BH photon sphere linearly by raising |q|>1 but decreases by raising |q|≤1. Sign of deflection angle of bending light rays is changed in presence of NEM effects with respect to ones obtained in absence of NEM fields. Absolute value of deflection angle rises by increasing |q|→1. Image locations in weak deflection limit (WDL) decrease (increases) by raising 0<|q|<1 in presence (absence) of NEM fields. By raising the closest distance of the bending light rays image locations in WDL change from left (right) to right (left) in absence (presence) of NEM fields. In WDL, radius of Einstein rings and corresponding magnification centroid become larger (smaller) in presence (absence) of NEM fields. Angular separation called s between the innermost and outermost relativistic images increases (decreases) by increasing 0<|q|<1 in absence (presence) of NEM fields. Corresponding magnification r decreases (increases) by raising 0<|q|<1 in absence (presence) of NEM fields.

No direct coupling between bending of galaxy disc stellar age and light profiles as seen from CALIFA

Recent theoretical and observational works claim the existence of galaxies with a characteristic age profile consisting on a negative radial trend followed by a smooth age upturn in its outskirts (“U-shape”). This shape has been generally related to down-bending light distributions; however, the existence of a real link between observed Surface Brightness (SB) profiles and changes in stellar properties such as age is still unclear.