Dynamical Formation of Scalarized Black Holes and Neutron Stars through Stellar Core Collapse
- 15 October 2021
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 127 (16), 161103
- https://doi.org/10.1103/physrevlett.127.161103
Abstract
In a certain class of scalar-Gauss-Bonnet gravity, the black holes and the neutron stars can undergo spontaneous scalarization—a strong gravity phase transition triggered by a tachyonic instability due to the nonminimal coupling between the scalar field and the spacetime curvature. Studies of this phenomenon have, so far, been restricted mainly to the study of the tachyonic instability and stationary scalarized black holes and neutron stars. To date, no realistic physical mechanism for the formation of isolated scalarized black holes and neutron stars has been proposed. We study, for the first time, the spherically symmetric fully nonlinear stellar core collapse to a black hole and a neutron star in scalar-Gauss-Bonnet theories allowing for a spontaneous scalarization. We show that the core collapse can produce scalarized black holes and scalarized neutron stars starting with a nonscalarized progenitor star. The possible paths to reach the end (non)scalarized state are quite rich leading to interesting possibilities for observational manifestations.Funding Information
- Deutsche Forschungsgemeinschaft (DO 1771/1-1)
- Eberhard Karls Universität Tübingen
- Bulgarian National Science Fund (KP-06-H28/7)
- European Cooperation in Science and Technology (CA16104, CA16214)
- Deutscher Akademischer Austauschdienst (109-2927-I-007-503)
- Ministry of Science and Technology, Taiwan
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