Bonn 2020 – scientific programme
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GR: Fachverband Gravitation und Relativitätstheorie
GR 11: Alteranative Classical Theories of Gravitation
GR 11.1: Talk
Thursday, April 2, 2020, 14:00–14:15, H-HS V
Particle-like solutions in Einstein-scalar-Gauss-Bonnet theories — •Burkhard Kleihaus1, Jutta Kunz1, and Panagiota Kanti2 — 1University of Oldenburg — 2University of Ioannina
Einstein-scalar-Gauss-Bonnet (EsGB) theories are motivated from a quantum gravity perspective and include higher-curvature contributions in the form of the quadratic Gauss-Bonnet term coupled to a scalar field. Black holes and wormholes in EsGB theories have been extensively studied in the past. Here a new type of particle-like solutions is discussed. It represents globally regular spacetime manifolds and its effective stress-energy tensor is free from pathologies. We determine the domain of existence and compare with wormhole solutions, black holes and Janis-Newman-Winicourt-Wyman solutions. We show that the particle-like solutions are ultracompact objects possessing a lightring and featuring echoes in the gravitational-wave spectrum.