Perturbed black holes in Einstein-dilaton-Gauss-Bonnet gravity: Stability, ringdown, and gravitational-wave emission
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- PhysRevD.94.104024
Final published version, 421 KB, PDF document
Gravitational waves emitted by distorted black holes-such as those arising from the coalescence of two neutron stars or black holes-carry not only information about the corresponding spacetime but also about the underlying theory of gravity. Although general relativity remains the simplest, most elegant, and viable theory of gravitation, there are generic and robust arguments indicating that it is not the ultimate description of the gravitational universe. Here, we focus on a particularly appealing extension of general relativity, which corrects Einstein's theory through the addition of terms which are second order in curvature: the topological Gauss-Bonnet invariant coupled to a dilaton. We study gravitational-wave emission from black holes in this theory and (i) find strong evidence that black holes are linearly (mode) stable against both axial and polar perturbations, (ii) discuss how the quasinormal modes of black holes can be excited during collisions involving black holes, and finally (iii) show that future ringdown detections with a large signal-to-noise ratio would improve current constraints on the coupling parameter of the theory.
Original language | English |
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Article number | 104024 |
Journal | Physical Review D |
Volume | 94 |
Issue number | 10 |
Number of pages | 15 |
ISSN | 2470-0010 |
DOIs | |
Publication status | Published - 10 Nov 2016 |
Externally published | Yes |
- QUASI-NORMAL MODES, RADIATION, SYSTEMS
Research areas
ID: 299820239