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An anisotropic cosmic fluid with radial heat flux which sources a time dependent Rindler geometry is investigated. Even though its energy density $\rho$ is positive, the radial and transversal pressur...
Static and spherically symmetric black holes in $f(R)$ theories     Static  spherically  symmetric  black holes  theories       font style='font-size:12px;'> 2011/10/14
We study some features of static and spherically symmetric solutions (SSS) with a horizon in $f(R)$ theories of gravitation by means of a near-horizon analysis. A necessary condition for an $f(R)$ the...
A theory has been presented previously in which the geometrical structure of a real four-dimensional space time manifold is expressed by a real orthonormal tetrad, and the group of diffeomorphisms is ...
The boundary energy - momentum tensors for a static observer in the conformally flat Rindler geometry are considered. We found the surface energy is positive far form the Planck world but the transver...
ON THE ORBITAL MOTION OF A BODY IN A SPHERICALLY SYMMETRIC FIELD IN ROSEN'S BIMETRIC GRAVITATION THEORY
ON THE POTENTIAL ENERGY OF SPHERICALLY SYMMETRIC STELLAR SYSTEMS。
ON THE ORBITS IN NONSTATIC SPHERICALLY SYMMETRIC FIELDS IN ROSEN`S BIMETRIC GRAVITATION THEORY
In this paper we shall investigate the timelike geodesics for an extremal, spherically symmetric, massless dilaton black hole, using an exact solution obtained by Gary Horowitz.

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