Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2006-07-19
Class.Quant.Grav. 23 (2006) 6599-6620
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
29 pages
Scientific paper
10.1088/0264-9381/23/23/002
We study the Robinson-Trautman-Maxwell Fields in two closely related coordinate systems, the original Robinson-Trautman (RT) coordinates (in a more general context, often referred to as NU coordinates) and Bondi coordinates. In particular, we identify one of the RT variables as a velocity and then from the Bondi energy-momentum 4-vector, we find kinematic expressions for the mass and momentum in terms of this velocity. From these kinematic expressions and the energy-momentum loss equation we obtain surprising equations of motion for `the center of mass' of the source where the motion takes place in the four-dimensional Poincare translation sub-group of the BMS group.
Kozameh Carlos
Newman Ezra Ted
Silva-Ortigoza Gilberto
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