Topological stars are solutions of Einstein-Maxwell theory in D=5. For specific choices of the parameters, the solution is capped and thus smooth and horizonless and can be reduced to D=4 along a circle. We study the energy and angular momentum radiated by a scalar particle moving on a circular orbit in the D=4 noncompact directions, extending a previous study [Phys. Rev. D 110, 084077 (2024)PRVDAQ2470-001010.1103/PhysRevD.110.084077]. We also discuss self-force effects on the motion of a spinless probe.
Scalar waves in a topological star spacetime: Self-force and radiative losses
Donato BiniMembro del Collaboration Group
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2025
Abstract
Topological stars are solutions of Einstein-Maxwell theory in D=5. For specific choices of the parameters, the solution is capped and thus smooth and horizonless and can be reduced to D=4 along a circle. We study the energy and angular momentum radiated by a scalar particle moving on a circular orbit in the D=4 noncompact directions, extending a previous study [Phys. Rev. D 110, 084077 (2024)PRVDAQ2470-001010.1103/PhysRevD.110.084077]. We also discuss self-force effects on the motion of a spinless probe.File in questo prodotto:
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