Stable spontaneously-scalarized black holes in generalized scalar-tensor theories
| Autor: | Georgios Antoniou, Caio F. B. Macedo, Ryan McManus, Thomas P. Sotiriou |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
High Energy Physics - Theory General Relativity and Quantum Cosmology High Energy Physics - Theory (hep-th) Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) Mathematics::Differential Geometry Astrophysics - High Energy Astrophysical Phenomena |
| Zdroj: | Physical Review D. 106 |
| ISSN: | 2470-0029 2470-0010 |
| DOI: | 10.1103/physrevd.106.024029 |
| Popis: | It has been shown that the synergy of a scalar field coupling with both the Ricci scalar and the Gauss-Bonnet invariant significantly affects the properties of scalarized black holes and neutron stars, including their domain of existence and the amount of scalar hair they carry. Here we study the radial stability of scalarized black-hole solutions. We demonstrate that they are stable against radial perturbations for Ricci couplings consistent with both a late-time cosmological attractor and the evasion of binary pulsar constraints. In addition, we investigate the effect of the Ricci coupling on the hyperbolicity of the equation governing linear, radial perturbations and show that it significantly reduces the region over which hyperbolicity is lost. 11 pages, 8 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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