Phase Diagrams of Charged Compact Boson Stars

Understand

Compact boson stars, whose scalar field vanishes identically in the exterior region, arise in a theory involving a {\it massless} complex scalar field with a conical potential, when coupled to gravity.

• Their charged compact generalizations, obtained in the presence of a U(1) gauge field, exhibit further interesting features.
• On the one hand, charged compact boson shells can arise, whose scalar field vanishes also in the central region, while on the other hand, the domain of existence of charged compact boson stars exhibits bifurcation points.
• First 2D phase diagrams have been studied before.