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GR: Fachverband Gravitation und Relativitätstheorie

GR 12: Gravitational Waves

GR 12.3: Vortrag

Mittwoch, 18. März 2015, 17:50–18:10, H 2013

Isofrequency Pairing of spinning particles in Schwarzschild-de-Sitter Spacetime — •Daniela Kunst¹, Volker Perlick¹, and Claus Lämmerzahl^1,2 — ¹ZARM, Universität Bremen, Bremen — ²Universität Oldenburg, Oldenburg

Einstein's theory of general relativity leads to the prediction of gravitational waves, i.e. oscillations in the gravitational field propagating at the speed of light. One observable feature is the frequency of a gravitational wave. These frequencies can be related to the fundamental ones of the dynamical system representing the source. It was long thought that the frequencies describe the state of a conservative dynamical system uniquely and therefore offer clear information on the underlying source. However, it has been shown that the system of a testparticle moving around a Schwarzschild or Kerr black hole contains states with degenerate frequencies. Thus, having the frequencies is not sufficient to make a distinct deduction on the state of the dynamical system evoking obstacles for the scientiests who are interpreting gravitational wave signals.

In order to make the system more astrophysically relevant we investigate the system of a spinning particle moving in a Schwarzschild geometry with a positive cosmological constant.