Discovering gravitational waveform distortions from lensing: A deep dive into GW231123
arXiv:2512.16916 · doi:10.1103/5292-948q
Abstract
Gravitational waves (GWs) are unique messengers as they travel through the Universe without alteration except for gravitational lensing. Their long wavelengths make them susceptible to diffraction by cosmic structures, providing an unprecedented opportunity to map dark matter substructures. Identifying lensed events requires the analysis of thousands to millions of simulated events to reach high statistical significances. This is computationally prohibitive with standard GW parameter estimation methods. We exploit DINGO-lensing, a deep-learning algorithm that accelerates the inference from CPU days to minutes to thoroughly reanalyze GW231123, the most promising lensing candidate to date. By performing more than 200,000 simulations with 3 different waveform models, we find that its statistical significance is below 4 and the event cannot be claimed as lensed. We observe that 8% of GW231123-like nonlensed simulations favor lensing, which could be explained by the self-similarity of short-duration signals. Still, 58% of GW231123-like lensed simulations have larger support for lensing, showing that higher detection statistics are possible. We show that analyzing simulations with different waveform models only lowers the significance, highlighting the relevance of waveform systematics. Although GW231123 exposes the challenges of claiming the first GW lensing detection, our deep-learning methods have demonstrated to be powerful enough to enable the upcoming discovery of lensed GWs.
7 pages, 4 figures, matches PRD published version
References in corpus (51)
- Advanced Virgo: a 2nd generation interferometric gravitational wave detector
- Advanced LIGO
- GW190521: A Binary Black Hole Merger with a Total Mass of
- Bilby: A user-friendly Bayesian inference library for gravitational-wave astronomy
- Massive Black Holes as Population III Remnants
- Primordial Black Holes - Perspectives in Gravitational Wave Astronomy -
- Properties and astrophysical implications of the 150 Msun binary black hole merger GW190521
- Surrogate models for precessing binary black hole simulations with unequal masses
- Wave Effects in Gravitational Lensing of Gravitational Waves from Chirping Binaries
- GW190521: orbital eccentricity and signatures of dynamical formation in a binary black hole merger signal
- Real-time gravitational-wave science with neural posterior estimation
- GW190521 as a merger of Proca stars: a potential new vector boson of eV
- Search for gravitational lensing signatures in LIGO-Virgo binary black hole events
- Effect of gravitational lensing on the distribution of gravitational waves from distant binary black hole mergers
- Gravitational-wave parameter estimation with autoregressive neural network flows
- SEOBNRv5PHM: Next generation of accurate and efficient multipolar precessing-spin effective-one-body waveforms for binary black holes
- Precise LIGO Lensing Rate Predictions for Binary Black Holes
- GW190521 as a dynamical capture of two nonspinning black holes
- The GW190521 Mass Gap Event and the Primordial Black Hole Scenario
- Phase effects from strong gravitational lensing of gravitational waves
- GW231123: a Binary Black Hole Merger with Total Mass 190-265
- Neural Importance Sampling for Rapid and Reliable Gravitational-Wave Inference
- Observational signatures of microlensing in gravitational waves at LIGO/Virgo frequencies
- Please repeat: Strong lensing of gravitational waves as a probe of compact binary and galaxy populations
- Gravitational wave lensing beyond general relativity: birefringence, echoes and shadows
- Testing the nature of gravitational-wave polarizations using strongly lensed signals
- Gravitational wave lensing as a probe of halo properties and dark matter
- Constraints on compact dark matter from gravitational wave microlensing
- Lensing of gravitational waves as a probe of compact dark matter
- Follow-up Analyses to the O3 LIGO-Virgo-KAGRA Lensing Searches
- GWTC-4.0: An Introduction to Version 4.0 of the Gravitational-Wave Transient Catalog
- Discovering gravitationally lensed gravitational waves: predicted rates, candidate selection, and localization with the Vera Rubin Observatory
- Evidence for eccentricity in the population of binary black holes observed by LIGO-Virgo-KAGRA
- Exploring the hidden Universe: A novel phenomenological approach for recovering arbitrary gravitational-wave millilensing configurations
- Microlensing of gravitational waves by dark matter structures
- Exploring the Impact of Microlensing on Gravitational Wave Signals: Biases, Population Characteristics, and Prospects for Detection
- Probing lens-induced gravitational-wave birefringence as a test of general relativity
- Lensing of Gravitational Waves as a Novel Probe of Graviton Mass
- Adapting to noise distribution shifts in flow-based gravitational-wave inference
- Detectability of lensed gravitational waves in matched-filtering searches
- GLoW: novel methods for wave-optics phenomena in gravitational lensing
- Multi-messenger Gravitational Lensing
- Observational Signatures of Highly Magnified Gravitational Waves from Compact Binary Coalescence
- What is the nature of GW230529? An exploration of the gravitational lensing hypothesis
- False positives for gravitational lensing: the gravitational-wave perspective
- Effects of Galaxy Cluster Structure on Lensed Gravitational Waves
- Diffraction around caustics in gravitational wave lensing
- Identification and characterization of distorted gravitational waves by lensing using deep learning
- GW231123: Overlapping Gravitational Wave Signals?
- Probing Binary Lens Caustics with Gravitational Waves: A Uniform Approximation Approach
- Accelerated inference of microlensed gravitational waves with machine learning