Boson stars are particle-like solutions in general relativity that model dark matter, black hole mimickers, and binary systems.
Compact Boson Stars
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abstract
We consider compact boson stars that arise for a V-shaped scalar field potential. They represent a one parameter family of solutions of the scaled Einstein-signum-Gordon equations. We analyze the physical properties of these solutions and determine their domain of existence. Along their physically relevant branch emerging from the compact Q-ball solution, their mass increases with increasing radius. Empoying arguments from catastrophe theory we argue that this branch is stable, until the maximal value of the mass is reached. There the mass and size are on the order of magnitude of the Schwarzschild limit, and thus the spiralling respectively oscillating behaviour, well-known for compact stars, sets in.
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Dynamical Boson Stars
Boson stars are particle-like solutions in general relativity that model dark matter, black hole mimickers, and binary systems.
- Timing-Window Mechanism for Chain-Like Transients in Collisions of Radially Excited Boson Stars
- Massive boson stars: Stability and GW emission in head-on mergers