Extraction of gravitational radiation and global physical quantities at finite distances in numerical generated spacetimes.

EMANUEL GALLO; MORESCHI OSVALDO

Córdoba

Conferencia; Grav O7; 2007

We study the difficulties found in numerical representations of spacetimes, where the gravitational radiation and total momentum is estimated at finite distances. We point out several possible problems arising from gauge and tetrad ambiguities. We indicate how to remove these freedom.