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Does the cosmological constant imply the existence of a minimum mass?
C. G. Boehmer, T. Harko
We show that in the framework of the classical general relativity the presence of a positive cosmological constant implies the existence of a minimal mass and of a minimal density…
Chaplygin gas dominated anisotropic brane world cosmological models
M. K. Mak, T. Harko
We present exact solutions of the gravitational field equations in the generalized Randall-Sundrum model for an anisotropic brane with Bianchi type I geometry, with a generalized C…
Relativistic Compact Objects in Isotropic Coordinates
M. K. Mak, T. Harko
We present a matrix method for obtaining new classes of exact solutions for Einstein's equations representing static perfect fluid spheres. By means of a matrix transformation, we…
Conformally symmetric vacuum solutions of the gravitational field equations in the brane-world models
T. Harko, M. K. Mak
A class of exact solutions of the gravitational field equations in the vacuum on the brane are obtained by assuming the existence of a conformal Killing vector field, with non-stat…
Dynamical instability of fluid spheres in the presence of a cosmological constant
C. G. Boehmer, T. Harko
The equations describing the adiabatic, small radial oscillations of general relativistic stars are generalized to include the effects of a cosmological constant. The generalized e…