Freiburg 2008 – wissenschaftliches Programm
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GR: Fachverband Gravitation und Relativitätstheorie
GR 6: Numerische Relativitätstheorie
GR 6.1: Vortrag
Dienstag, 4. März 2008, 16:45–17:05, KGI-HS 1010
Rotating Boson Stars and Q-Balls II: Negative Parity and Ergoregions — Burkhard Kleihaus2, Jutta Kunz1, Meike List2, and •Isabell Schaffer2 — 1Institut für Physik, Universität Oldenburg, D-26111 Oldenburg — 2ZARM, Universität Bremen, Am Fallturm, D-28359
We construct axially symmetric, rotating boson stars with positive and negative parity. Their flat space limits represent spinning Q-balls. Q-balls and boson stars exist only in a limited frequency range. The coupling to gravity gives rise to a spiral-like frequency dependence of the mass and charge of boson stars. We analyze the properties of these solutions, in particular, the presence of ergoregions in boson stars, and determine their domains of existence.