Strong lensing of gravitational waves with modified propagation
arXiv:2404.10809 · doi:10.1103/PhysRevD.110.104050
Abstract
We explore the impact of corrections to the propagation on the waveforms of gravitationally lensed gravitational waves under the geometrical optics approximation, focusing on both uniform cosmological modifications and local modifications localized around lensing objects. By adopting a model-independent phenomenological approach, we systematically investigate the effects of these modifications in strong lensing scenarios, where detection of multiple images is expected. Our analysis reveals that cosmological modifications can yield corrections to the time delay that remain to be minor compared with the effects that accumulate over the whole propagation process, which are present also in the unlensed waveform. By contrast, local modifications around lensing objects can alter the image position and also the magnification factor, which is potentially polarization-selective and frequency-dependent. In some case we can have image disappearance as well as signal amplification. Furthermore, we demonstrate that such modifications can cause degradation of waveform match with the templates based on general relativity. This study highlights the importance of considering waveform modifications to search for the signature of modified propagation or the existence of extra polarization modes, and proposes potential observational targets.
18 pages, 11 figures
References in corpus (15)
- Advanced Virgo: a 2nd generation interferometric gravitational wave detector
- Advanced LIGO
- GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run
- Model Waveform Accuracy Standards for Gravitational Wave Data Analysis
- Anisotropic stress as signature of non-standard propagation of gravitational waves
- Probing non-tensorial polarizations of stochastic gravitational-wave backgrounds with ground-based laser interferometers
- Observational signatures of microlensing in gravitational waves at LIGO/Virgo frequencies
- Black Hole Gravitational Waves in the Effective Field Theory of Gravity
- Stellar-mass microlensing of gravitational waves
- Modified dispersion relations in extra dimensions
- Pure polarization test of GW170814 and GW170817 using waveforms consistent with modified theories of gravity
- Probing lens-induced gravitational-wave birefringence as a test of general relativity
- Scalar-tensor mixed polarization search of gravitational waves
- Gravitational-wave cosmological distances in scalar-tensor theories of gravity
- Scalar polarization window in gravitational-wave signals