Particle-like ultracompact objects in Einstein-scalar-Gauss-Bonnet theories
General Relativity and Quantum Cosmology
2020-04-22 v2 High Energy Physics - Theory
Abstract
We present a new type of ultracompact objects, featuring lightrings and echoes in the gravitational-wave spectrum. These particle-like solutions arise in Einstein-scalar-Gauss-Bonnet theories in four spacetime dimensions, representing globally regular spacetime manifolds. The scalar field diverges at the center, but the effective stress-energy tensor is free from pathologies. We determine their domain of existence and compare with wormhole solutions, black holes and the Fisher solution.
Keywords
Cite
@article{arxiv.1910.02121,
title = {Particle-like ultracompact objects in Einstein-scalar-Gauss-Bonnet theories},
author = {Burkhard Kleihaus and Jutta Kunz and Panagiota Kanti},
journal= {arXiv preprint arXiv:1910.02121},
year = {2020}
}
Comments
7 pages, 4 figures, the analysis on the observable effects was extended, a new plot, comments and references were added, version published in Physics Letters B