Back to Search
Start Over
Nonlinearities in Black Hole Ringdowns
Nonlinearities in Black Hole Ringdowns
- Source :
- Physical Review Letters
- Publication Year :
- 2022
-
Abstract
- The gravitational wave strain emitted by a perturbed black hole (BH) ringing down is typically modeled analytically using first-order BH perturbation theory. In this Letter we show that second-order effects are necessary for modeling ringdowns from BH merger simulations. Focusing on the strain's $(\ell,m)=(4,4)$ angular harmonic, we show the presence of a quadratic effect across a range of binary BH mass ratios that agrees with theoretical expectations. We find that the quadratic $(4,4)$ mode's amplitude exhibits quadratic scaling with the fundamental $(2,2)$ mode -- its parent mode. The nonlinear mode's amplitude is comparable to or even larger than that of the linear $(4,4)$ mode. Therefore, correctly modeling the ringdown of higher harmonics -- improving mode mismatches by up to 2 orders of magnitude -- requires the inclusion of nonlinear effects.<br />6+2 pages, 4 figures, 1 table. Matches PRL version
- Subjects :
- High Energy Astrophysical Phenomena (astro-ph.HE)
High Energy Physics - Theory
High Energy Physics - Theory (hep-th)
General Physics and Astronomy
FOS: Physical sciences
General Relativity and Quantum Cosmology (gr-qc)
Astrophysics - High Energy Astrophysical Phenomena
General Relativity and Quantum Cosmology
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Physical Review Letters
- Accession number :
- edsair.doi.dedup.....3d97847464f33234574ff7323985c23d