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How general relativity stacks up: Testing gravity by coherently combining gravitational-wave observations
Lachlan Passenger, Nir Guttman, Paul D. Lasky +1
A core mission of gravitational-wave astronomy is to test general relativity (GR) in the high-curvature, high-velocity regime. The field has already seen significant progress in th…
Joint inference for gravitational-wave signal and noise glitch: Method and application
Shun Yin Cheung, Rhiannon Udall, Derek Davis +2
Non-Gaussian noise transients ("glitches") in gravitational-wave observatories degrade our ability to accurately perform astrophysical inference. We present the analysis pipeline b…
GW231123: extreme spins or microglitches?
Anarya Ray, Sharan Banagiri, Eric Thrane +1
The recently reported binary black hole merger, GW231123, has unusual properties that make it hard to explain astrophysically. Parameter estimation studies are consistent with maxi…
A search for extra polarisations using a Gaussian process in Gravitational-Wave Transient Catalogue 3
Shun Yin Cheung, Lachlan Passenger, Paul D. Lasky +1
General relativity predicts that gravitational waves are described by two polarisation states: the plus state and cross state. However, alternate theories of gravity a…
A Gaussian process framework for testing general relativity with gravitational waves
Lachlan Passenger, Shun Yin Cheung, Nir Guttman +3
Gravitational-wave astronomy provides a promising avenue for the discovery of new physics beyond general relativity as it probes extreme curvature and ultra-relativistic dynamics.…
Progress toward the detection of the gravitational-wave background from stellar-mass binary black holes: a mock data challenge
Xiao-Xiao Kou, Muhammed Saleem, Vuk Mandic +2
While the third LIGO--Virgo gravitational-wave transient catalog includes 90 signals, it is believed that binary black holes merge somewhere in the Universe every…
Significant challenges for astrophysical inference with next-generation gravitational-wave observatories
A. Makai Baker, Paul D. Lasky, Eric Thrane +1
The next generation of gravitational-wave observatories will achieve unprecedented strain sensitivities with an expanded observing band. They will detect binary ne…
Choosing suitable noise models for nanohertz gravitational-wave astrophysics
Valentina Di Marco, Andrew Zic, Ryan M. Shannon +2
Accurately estimating the parameters of the nanohertz gravitational-wave background is essential for understanding its origin. The background is typically modeled with a power-law…
Does spacetime have memories? Searching for gravitational-wave memory in the third LIGO-Virgo-KAGRA gravitational-wave transient catalogue
Shun Yin Cheung, Paul D. Lasky, Eric Thrane
Gravitational-wave memory is a non-linear effect predicted by general relativity that remains undetected. We apply a Bayesian analysis framework to search for gravitational-wave me…
Transdimensional inference for gravitational-wave astronomy with Bilby
Hui Tong, Nir Guttman, Teagan A. Clarke +8
It has become increasingly useful to answer questions in gravitational-wave astronomy using transdimensional models where the number of free parameters can be varied depending on t…
Striking the right tone: toward a self-consistent framework for measuring black hole ringdowns
Teagan A. Clarke, Maximiliano Isi, Paul D. Lasky +9
The ringdown portion of a binary black hole merger consists of a sum of modes, each containing an infinite number of tones that are exponentially damped sinusoids. In principle, th…
Multi-messenger astronomy with a Southern-Hemisphere gravitational-wave observatory
James W. Gardner, Ling Sun, Ssohrab Borhanian +4
Joint observations of gravitational waves and electromagnetic counterparts will answer questions about cosmology, gamma-ray bursts, and the behaviour of matter at supranuclear dens…
Nuclear physics with gravitational waves from neutron stars disrupted by black holes
Teagan A. Clarke, Lani Chastain, Paul D. Lasky +1
Gravitational waves from neutron star-black hole (NSBH) mergers that undergo tidal disruption provide a potential avenue to study the equation of state of neutron stars and hence t…
A Rosetta Stone for eccentric gravitational waveform models
Alan M. Knee, Isobel M. Romero-Shaw, Paul D. Lasky +2
Orbital eccentricity is a key signature of dynamical binary black hole formation. The gravitational waves from a coalescing binary contain information about its orbital eccentricit…
Consistency of the Parkes Pulsar Timing Array Signal with a Nanohertz Gravitational-wave Background
Boris Goncharov, Eric Thrane, Ryan M. Shannon +9
Pulsar timing array experiments have recently reported strong evidence for a common-spectrum stochastic process with a strain spectral index consistent with that expected of a nano…
Gravitational-wave inference for eccentric binaries: the argument of periapsis
Teagan A. Clarke, Isobel M. Romero-Shaw, Paul D. Lasky +1
Gravitational waves from binary black hole mergers have allowed us to directly observe stellar-mass black hole binaries for the first time, and therefore explore their formation ch…
GWCloud: a searchable repository for the creation and curation of gravitational-wave inference results
A. Makai Baker, Paul D. Lasky, Eric Thrane +6
There are at present gravitational-wave candidates from compact binary mergers reported in the astronomical literature. As detector sensitivities are improved, the…
Did Goryachev et al. detect megahertz gravitational waves?
Paul D. Lasky, Eric Thrane
Goryachev et al. [1] recently announced the detection of "two strongly significant events" in their Bulk Acoustic Wave High Frequency Gravitational Wave Antenna. They claim many po…
The Next Generation Global Gravitational Wave Observatory: The Science Book
Vicky Kalogera, B. S. Sathyaprakash, Matthew Bailes +88
The next generation of ground-based gravitational-wave detectors will observe coalescences of black holes and neutron stars throughout the cosmos, thousands of them with exceptiona…
Measuring the properties of active galactic nuclei disks with gravitational waves
Avi Vajpeyi, Eric Thrane, Rory Smith +2
Active galactic nuclei (AGN) are promising environments for the assembly of merging binary black hole (BBH) systems. Interest in AGNs as nurseries for merging BBH is rising followi…
Building better spin models for merging binary black holes: Evidence for non-spinning and rapidly spinning nearly aligned sub-populations
Shanika Galaudage, Colm Talbot, Tushar Nagar +3
Recent work paints a conflicting portrait of the distribution of black hole spins in merging binaries measured with gravitational waves. Some analyses find that a significant fract…
The imprint of superradiance on hierarchical black hole mergers
Ethan Payne, Ling Sun, Kyle Kremer +2
Ultralight bosons are a proposed solution to outstanding problems in cosmology and particle physics: they provide a dark-matter candidate while potentially explaining the strong ch…
A follow-up on intermediate-mass black hole candidates in the second LIGO-Virgo observing run with the Bayes Coherence Ratio
Avi Vajpeyi, Rory Smith, Eric Thrane +7
The detection of an intermediate-mass black hole population ( ) will provide clues to their formation environments (e.g., disks of active galactic nuclei, glo…
The Memory Remains (Undetected): Updates from the Second LIGO/Virgo Gravitational-Wave Transient Catalog
Moritz Hübner, Paul Lasky, Eric Thrane
The LIGO and Virgo observatories have reported 39 new gravitational-wave detections during the first part of the third observation run, bringing the total to 50. Most of these new…