Showing papers by "José Natário published in 2022"
TL;DR: In a recent paper as mentioned in this paper , the American Physical Society (PhySH) defined the subject headings of physics subject topics as:Fluids & classical fields in curved spacetimeGeneral relativityGravitation, Cosmology & Astrophysics
Abstract: Received 2 June 2022DOI:https://doi.org/10.1103/PhysRevD.105.129903© 2022 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasFluids & classical fields in curved spacetimeGeneral relativityGravitation, Cosmology & Astrophysics
2 citations
TL;DR: In this paper , the authors investigate whether mergers of black holes and neutron stars may probe the strong-curvature regime of general relativity, and find that the Kretschmann scalar can dynamically increase by orders of magnitude, during the gravitational collapse of scalar fields, and that the normalized peak curvature does not correspond to that of the critical solution.
Abstract: Stationary compact astrophysical objects such as black holes and neutron stars behave as classical systems from the gravitational point of view. Their (observable) curvature is everywhere ‘small’. Here we investigate whether mergers of such objects, or other strongly dynamical spacetimes such as collapsing configurations, may probe the strong-curvature regime of general relativity. Our results indicate that dynamical black hole spacetimes always result in a modest increase ∼3 in the Kretschmann scalar, relative to the stationary state. In contrast, we find that the Kretschmann scalar can dynamically increase by orders of magnitude, during the gravitational collapse of scalar fields, and that the (normalized) peak curvature does not correspond to that of the critical solution. Nevertheless, without fine tuning of initial data, this increase lies far below that needed to render quantum-gravity corrections important.