Rotating Boson Stars and Q-Balls II: Negative Parity and Ergoregions

Understand

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.