Parts | Days | Selection | Search | Updates | Downloads | Help
GR: Fachverband Gravitation und Relativitätstheorie
GR 8: Schwarze Löcher – Bahnen
GR 8.4: Talk
Tuesday, February 28, 2012, 17:40–18:00, ZHG 002
Detailed discussion and visualization of circular orbits in the extreme Reissner-Nordstrom dihole metric — •Andreas Wünsch1, Thomas Müller2, and Günther Wunner1 — 11. Institut für Theoretische Physik, Universität Stuttgart, 70550 Stuttgart, Germany — 2Visualisierungsinstitut der Universität Stuttgart, 70569 Stuttgart, Germany
The extreme Reissner-Nordstrom dihole metric is a special case of the Majumdar-Papapetrou solution (of the Einstein-Maxwell equations), where the electromagnetic repulsion between two static, extreme Reissner-Nordstrom black holes is compensated by their gravitational attraction. We determined all circular orbits of neutral test particles (timelike and lightlike) using the effective potential formalism. The first-person view of a particle on a circular orbit, realized using four-dimensional general-relativistic ray tracing, depicts the image a virtual camera would actually produce. Here, we concentrate on the geometric distortion due to the dihole metric on the visual appearance of orbiting objects. The extreme Reissner-Nordstrom dihole metric yields a simple and instructive example of multi-black-hole system for a detailed exploration of the geodesic structure and the visual appearance of orbiting objects.