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GR: Fachverband Gravitation und Relativitätstheorie

GR 14: Hauptvorträge Donnerstag: Dynamik ausgedehnter Körper 1

GR 14.2: Hauptvortrag

Donnerstag, 18. März 2010, 14:45–15:30, JUR K

Spinning test particles in black-hole space-times — •Oldřich Semerák — Institute of Theoretical Physics, Faculty of Mathematics and Physics, Charles University in Prague, Czech Republic

In general relativity, the behaviour of spinning test particles is usually treated within ‘pole-dipole’ approximation, represented by Mathisson-Papapetrou equations. The system has to be closed by a ‘spin supplementary condition’ whose role is to select a representative worldline with respect to which the test body’s mass and spin are determined. We illustrate the effect of spin-curvature coupling and of the supplementary condition on numerical trajectories obtained in black-hole space-times. We also mention that non-zero spin turns the particle dynamics chaotic. What remains to be clarified is the validity of pole-dipole approximation and the relevance of spin in astrophysical situations.