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The properties of the first continuous gravitational waves: Optimizing pulsar timing observations for supermassive black hole binary detection
Blaze Houlden, Eric Thrane, Katie Auchettl
Several pulsar timing arrays have reported evidence for a nanohertz gravitational-wave background. This background is thought to arise from the superposition of signals from a popu…
Revealing Four Subpopulations of Binary Black-Hole Mergers with the Fifth Gravitational-Wave Transient Catalog
Nir Guttman, Paul D. Lasky, Eric Thrane
Gravitational-wave data are beginning to reveal a structured landscape of black-hole masses and spins, suggesting multiple formation processes are now being resolved observationall…
Fortifying gravitational-wave population inference with normalizing flows
Christian Adamcewicz, Hugh McDougall, Paul D. Lasky +1
As the LIGO-Virgo-KAGRA collaboration's (LVK's) gravitational-wave transient catalog grows, we are learning a wealth of information from the population properties of binary black h…
Licence to Bin: Accurate and Scalable Inference for Binary Neutron Stars in Next-Generation Gravitational-Wave Detectors
Nir Guttman, A. Makai Baker, Paul D. Lasky +1
Next-generation gravitational-wave observatories will observe binary neutron-star mergers with much higher signal-to-noise ratios, over much longer durations and across broader fre…
A universal framework to identify eccentric binary mergers: GW200105 case study
Teagan A. Clarke, Isobel M. Romero-Shaw, Charlie Hoy +3
Orbital eccentricity in gravitational-wave signals from merging compact object binaries is a powerful indicator of their formation channel. Several binary black hole mergers and a…
A comprehensive framework for phase-coherent mapping of the gravitational-wave sky with pulsar timing arrays
Małgorzata Curyło, Eric Thrane, Paul D. Lasky +1
We present a practical implementation of a phase-coherent mapping technique for pulsar timing arrays that resolves the full complex polarisation state of the gravitational-wave sky…
Searching for gravitational waves from compact binary mergers powering long gamma-ray bursts during LIGO-Virgo-KAGRA's O3 run
Mallika R. Sinha, Teagan A. Clarke, Qifang Zhang +3
Neutron star binary mergers are often associated with short gamma-ray bursts (GRBs), but the recent detection of kilonovae coincident with long GRBs suggest that some mergers may p…
Frequency- and phase-resolved polarimetry of millisecond pulsars and its application to timing
Małgorzata Curyło, Andrew Zic, Shuangqiang Wang +16
Pulsar timing is used for a variety of applications including tests of fundamental physics, probing the structure of neutron stars, and detecting nanohertz gravitational waves. Dev…
A subpopulation of low-mass, spinning black holes: signatures of dynamical assembly
Hui Tong, Thomas A. Callister, Maya Fishbach +5
Gravitational-wave observations of massive, rapidly spinning binary black holes mergers provide increasing evidence for the dynamical origin of some mergers. Previous studies have…
Is GW231123 a hierarchical merger?
Lachlan Passenger, Sharan Banagiri, Eric Thrane +4
The binary black hole merger GW231123 is both the most massive gravitational-wave event observed and has the highest component spins measured to date. The dimensionless spins of th…
Trends in the Population of Binary Black Holes Following the Fourth Gravitational-Wave Transient Catalog: a Data-Driven Analysis
Nir Guttman, Ethan Payne, Paul D. Lasky +1
Current population models of binary black hole distributions are difficult to interpret because standard population inferences hinge on modeling choices, which can mask or mimic re…
Do both black holes spin in merging binaries? Evidence from GWTC-4 and astrophysical implications
Christian Adamcewicz, Nir Guttman, Paul D. Lasky +1
Angular momentum transport in high-mass stars is commonly modeled by extrapolating the behavior of better-observed low-mass stars. According to the conventional picture, the cores…
Evidence for Three Subpopulations of Merging Binary Black Holes at Different Primary Masses
Sharan Banagiri, Eric Thrane, Paul D. Lasky
With the release of the fourth LIGO--Virgo--KAGRA gravitational-wave catalog (GWTC-4), we are starting to gain a detailed view of the population of merging binary black holes. The…
Evidence of the pair instability gap from black hole masses
Hui Tong, Maya Fishbach, Eric Thrane +13
Stellar theory predicts a forbidden range of black-hole masses between -- due to pair-instability supernovae, but evidence for such a gap in the mass distri…
The MeerKAT Pulsar Timing Array: Maps of the gravitational-wave sky with the 4.5 year data release
Kathrin Grunthal, Rowina S. Nathan, Eric Thrane +16
In an accompanying publication, the MeerKAT Pulsar Timing Array (MPTA) collaboration reports tentative evidence for the presence of a stochastic gravitational-wave background, foll…
The MeerKAT Pulsar Timing Array: The first search for gravitational waves with the MeerKAT radio telescope
Matthew T. Miles, Ryan M. Shannon, Daniel J. Reardon +22
Pulsar Timing Arrays search for nanohertz-frequency gravitational waves by regularly observing ensembles of millisecond pulsars over many years to look for correlated timing residu…
Model-independent dark matter detection with the Cherenkov Telescope Array Observatory
Liam Pinchbeck, Csaba Balazs, Eric Thrane
Searches for annihilating dark matter are often designed with a specific dark matter candidate in mind. However, the space of potential dark matter models is vast, which raises the…
The birth mass function of neutron stars
Zhi-Qiang You, Xingjiang Zhu, Xiaojin Liu +12
The birth mass function of neutron stars encodes rich information about supernova explosions, double star evolution, and properties of matter under extreme conditions. To date, it…
Inferring jet physics from neutron star - black hole mergers with gravitational waves
Teagan A. Clarke, Paul D. Lasky, Eric Thrane
Neutron star - black hole (NSBH) mergers that undergo tidal disruption may launch jets that could power a gamma-ray burst. We use a population of simulated NSBH systems to measure…
Quantifying the coincidence between gravitational waves and fast radio bursts from neutron star - black hole mergers
Teagan A. Clarke, Nikhil Sarin, Eric J. Howell +2
Fast radio bursts (FRBs) are mysterious astrophysical transients whose origin and mechanism remain unclear. Compact object mergers may be a promising channel to produce some FRBs.…
No evidence for a dip in the binary black hole mass spectrum
Christian Adamcewicz, Paul D. Lasky, Eric Thrane +1
Stellar models indicate that the core compactness of a star, which is a common proxy for its explodability in a supernova, does not increase monotonically with the star's mass. Rat…
Are all models wrong? Falsifying binary formation models in gravitational-wave astronomy
Lachlan Passenger, Eric Thrane, Paul D. Lasky +3
As the catalogue of gravitational-wave transients grows, several entries appear "exceptional" within the population. Tipping the scales with a total mass of ,…
Systematic errors in searches for nanohertz gravitational waves
Valentina Di Marco, Andrew Zic, Ryan M. Shannon +1
A number of pulsar timing arrays have recently reported preliminary evidence for the existence of a nanohertz frequency gravitational-wave background. These analyses rely on detail…
Precision constraints on the neutron star equation of state with third-generation gravitational-wave observatories
Kris Walker, Rory Smith, Eric Thrane +1
It is currently unknown how matter behaves at the extreme densities found within the cores of neutron stars. Measurements of the neutron star equation of state probe nuclear physic…