Charged polytropic compact stars (2004)
Ray, S, Malheiro, M, Lemos, J P S, Zanchin, V T
In this work, we analyze the effect of charge in compact stars considering the limit of the maximum amount of charge they can hold. We find that the global balance of the forces allows a huge charge...
Supersymmetry of the extreme rotating toroidal black hole (2000)
We study the supersymmetry of the charged rotating toroidal black hole solutions found by Lemos and Zanchin, and show that the only configurations that are supersymmetric are: (i) the non-rotating...
Equiangular Spiral Modes of Power Law Disks (1999)
Lynden-Bell, D., Lemos, J. P. S.
The stability of self-similar power-law disks to non-axially symmetrical disturbances of zero frequency (omega = 0) is discussed. It is established that marginally unstable modes either have (omega =...
Stationary Black Holes in a Generalized Three-Dimensional Theory of Gravity (1996)
We consider a generalized three-dimensional theory of gravity which is specified by two fields, the graviton and the dilaton, and one parameter. This theory contains, as particular cases,...