scholarly journals On the solution of an f(r) theory of gravity motivated by gravitational waves in spherically symmetric space-time

2021 ◽  
Vol 39 (5) ◽  
pp. 137-144
Author(s):  
Aditya Mani Mishra

There are many modification of Einstein theory have been established which explain the behavior of universe realistically or hypo-theoretically. Out of those, an f(R) theory of gravity based on non-conformal invariance of gravitational waves has been developed. We attempted to find the solution of this theory for spherically symmetric spacetime in vacuum and compared its result to Einstein theory. We have concluded that solution is consistent with Newtonian limit at large distance from source. Solution predicts two horizon in the spacetime, none of them coincides with Schwarzschild counterpart. However, as this f(R) theory converges to Einstein theory, these horizons coincide.

1997 ◽  
Vol 12 (18) ◽  
pp. 3171-3180 ◽  
Author(s):  
Kamal K. Nandi ◽  
Anwarul Islam ◽  
James Evans

In the Schwarzschild field due to a mass moving with velocity v → c0, where c0 is the speed of light in vacuum, the source-induced quantum fluctuation in the light cone exhibits consistency with the Aichelburg–Sexl solution while that in the metric dynamical variable does not. At the horizon, none of the fluctuations is proportional to anything finite. However, in the nonrelativistic limit (v → 0), known expressions follow.


1992 ◽  
Vol 33 (6) ◽  
pp. 2336-2338 ◽  
Author(s):  
Subenoy Chakraborty ◽  
Ashok Kr. Chakraborty

2016 ◽  
Vol 13 (02) ◽  
pp. 1650009 ◽  
Author(s):  
Ghulam Shabbir ◽  
F. M. Mahomed ◽  
M. A. Qureshi

A study of proper projective symmetry in the most general form of non-static spherically symmetric space-time is given using direct integration and algebraic techniques. In this study, we show that when the above space-time admits proper projective symmetry it becomes a very special class of static spherically symmetric space-times.


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