Black holes and relativitic gravity theories
Abstract
All presently known relativistic gravitation theories were considered which have a Riemannian background geometry and possess exact static, spherically symmetric solutions which are asymptotically flat. Each theory predicts the existence of trapped surfaces (black holes). For a general static isotropic metric, MACSYMA was used to compute the NewmanPenrose equations, the black hole radius, the impact parameter, and capture radius for photon accretion. These results were then applied to several of the better known gravitation theories.
 Publication:

In NASA. Langley Res. Center Proc. of the 1977 MACSYMA Users' Conf. (NASA) p 97107 (SEE N7728750 1959
 Pub Date:
 1977
 Bibcode:
 1977macs.conf...97F
 Keywords:

 Black Holes (Astronomy);
 Gravitation;
 Relativity;
 Computer Programs;
 Riemann Manifold;
 Symmetry;
 Astronomy