A new gravitational wave event reveals a binary black hole merger with total mass 190-265 solar masses, indicating black holes can form via gravitational-wave driven mergers beyond standard stellar channels.
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Reversible-jump MCMC analysis of LIGO binary black hole mergers identifies three subpopulations with distinct properties and independent redshift evolution.
No definitive lensing is detected in GW231123, though a potential microlensing feature with modulation amplitude up to 0.8 at 95% confidence is noted, limited by large waveform systematics in short signals.
Resampling cross-correlation search of LIGO O4a data sets Sco X-1 continuous-wave upper limits below torque balance (independent of inclination) for 50–200 Hz.
Derives tight Holevo CRB for realistic linear sensors showing hierarchy with standard bounds and proposes readout improving LIGO rates by 25%.
Higher-order modes reduce absorption-induced thermal deformation in high-power interferometers, cutting optimal curvature correction to 33% for LG2,2 and 24% for HG3,3 versus the fundamental mode while improving optical loss and modal purity.
A centimeter-scale dynamic optical cavity with heterodyne readout achieves sub-femtometer per square root Hertz displacement sensitivity above 8 Hz and tracks motions over ten orders of magnitude in range.
Symbolic regression on GWTC-4 posteriors yields closed-form analytic formulae for merger-rate evolution, effective-spin dependencies on mass ratio and redshift, and conditional mass-ratio distributions at specific primary mass peaks.
GWTC-4 data analysis yields a pair-instability mass gap lower edge at 44.3^{+5.9}_{-3.5} M_⊙, an S-factor of 268^{+195}_{-116} keV b for ^{12}C(α,γ)^{16}O, and two populations supporting both direct formation and hierarchical mergers.
Statistical redshifts inferred from mass spectrum features and galaxy catalogs for 142 GW events yield H0 = 76.6 km s^{-1} Mpc^{-1} and Ξ0 = 1.2, consistent with general relativity.
LG0,6 mode plus tailored central mask reduces average contrast defect by >100x and mode loss by ~5x in Fabry-Perot cavities with realistic mirror figure errors, reaching current-detector performance levels.
Pith review generated a malformed one-line summary.
Simulations show LIGO-A# constrains the peak redshift of binary black hole merger rate (tracing star formation) to ±0.1 in one year, improving to ±0.02 with next-generation detectors.
No sub-solar-mass compact-binary mergers were found in LIGO O4a data, giving 90% merger-rate upper limits of 110-10000 Gpc^-3 yr^-1 and weak new dark-matter constraints.
A neural network is trained to predict probabilities for lower mass gap components and neutron star involvement in gravitational-wave candidates, with reported mean errors of 9% and 6% on O4a events.
Applying the brightest-galaxy method to three well-localized GW events yields 1, 1, and 4 candidate host galaxies and a Hubble constant estimate of ~79 km/s/Mpc, but with 29–36% random-association probability and a selection bias.
No significant cosmological anisotropy is found in the latest GW O4a and GRBWeb datasets using angular power spectra and two-point correlation functions, consistent with the cosmological principle.
cWB XP on LIGO O3/O4 data yields near-perfect SASI identification from GWs alone at O4 sensitivity (PD=0.97 at 10 kpc for PFI=0.01) and improves joint O3 detection over prior work.
Identifies eight Fermi-GBM sGRBs similar to 170817A via hardness-ratio K-means clustering and estimates ~5 GW+sGRB events by end of O4.
GWTC-5.0 is a data release documenting over 300 gravitational-wave events from compact binary mergers observed through early 2025.
LIGO-Virgo-KAGRA releases calibrated strain time series, noise-subtraction channels, and GWOSC v5.0 analysis products covering April 2024 to January 2025.
citing papers explorer
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GW231123: a Binary Black Hole Merger with Total Mass 190-265 $M_{\odot}$
A new gravitational wave event reveals a binary black hole merger with total mass 190-265 solar masses, indicating black holes can form via gravitational-wave driven mergers beyond standard stellar channels.
-
Reversible-jump MCMC reveals binary black hole subpopulations with distinct redshift evolution
Reversible-jump MCMC analysis of LIGO binary black hole mergers identifies three subpopulations with distinct properties and independent redshift evolution.
-
The First Model-Independent Upper Bound on Micro-lensing Signature of the Highest Mass Binary Black Hole Event GW231123
No definitive lensing is detected in GW231123, though a potential microlensing feature with modulation amplitude up to 0.8 at 95% confidence is noted, limited by large waveform systematics in short signals.
-
Sub-Torque-Balance Upper Limits on Continuous Gravitational Waves from Scorpius X-1
Resampling cross-correlation search of LIGO O4a data sets Sco X-1 continuous-wave upper limits below torque balance (independent of inclination) for 50–200 Hz.
-
Gaussian Quantum Metrology with Realistic Linear Sensors
Derives tight Holevo CRB for realistic linear sensors showing hierarchy with standard bounds and proposes readout improving LIGO rates by 25%.
-
Thermal Deformation Reduction in High-Power Interferometry with Higher-Order Laser Modes
Higher-order modes reduce absorption-induced thermal deformation in high-power interferometers, cutting optimal curvature correction to 33% for LG2,2 and 24% for HG3,3 versus the fundamental mode while improving optical loss and modal purity.
-
Demonstration of a compact optical resonator-based displacement sensing technique with sub-femtometer precision
A centimeter-scale dynamic optical cavity with heterodyne readout achieves sub-femtometer per square root Hertz displacement sensitivity above 8 Hz and tracks motions over ten orders of magnitude in range.
-
Interpretable Analytic Formulae for GWTC-4 Binary Black Hole Population Properties via Symbolic Regression
Symbolic regression on GWTC-4 posteriors yields closed-form analytic formulae for merger-rate evolution, effective-spin dependencies on mass ratio and redshift, and conditional mass-ratio distributions at specific primary mass peaks.
-
Gravitational-wave constraints on the pair-instability mass gap and nuclear burning in massive stars
GWTC-4 data analysis yields a pair-instability mass gap lower edge at 44.3^{+5.9}_{-3.5} M_⊙, an S-factor of 268^{+195}_{-116} keV b for ^{12}C(α,γ)^{16}O, and two populations supporting both direct formation and hierarchical mergers.
-
GWTC-4.0: Constraints on the Cosmic Expansion Rate and Modified Gravitational-wave Propagation
Statistical redshifts inferred from mass spectrum features and galaxy catalogs for 142 GW events yield H0 = 76.6 km s^{-1} Mpc^{-1} and Ξ0 = 1.2, consistent with general relativity.
-
Improving Beam Quality in Gravitational-Wave Interferometers Illuminated by Higher-Order Laguerre-Gaussian Modes
LG0,6 mode plus tailored central mask reduces average contrast defect by >100x and mode loss by ~5x in Fabry-Perot cavities with realistic mirror figure errors, reaching current-detector performance levels.
-
GWTC-4.0: Population Properties of Merging Compact Binaries
Pith review generated a malformed one-line summary.
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Mapping the star formation peak with LIGO A# and Next-Generation detectors
Simulations show LIGO-A# constrains the peak redshift of binary black hole merger rate (tracing star formation) to ±0.1 in one year, improving to ±0.02 with next-generation detectors.
-
Searches for Binary Mergers with Sub-solar Mass Components in Data from the First Part of LIGO--Virgo--KAGRA's Fourth Observing Run
No sub-solar-mass compact-binary mergers were found in LIGO O4a data, giving 90% merger-rate upper limits of 110-10000 Gpc^-3 yr^-1 and weak new dark-matter constraints.
-
Training a neural network to rapidly identify candidate gravitational-wave events in the lower mass gap
A neural network is trained to predict probabilities for lower mass gap components and neutron star involvement in gravitational-wave candidates, with reported mean errors of 9% and 6% on O4a events.
-
Identifying the host of compact binary mergers
Applying the brightest-galaxy method to three well-localized GW events yields 1, 1, and 4 candidate host galaxies and a Hubble constant estimate of ~79 km/s/Mpc, but with 29–36% random-association probability and a selection bias.
-
Testing cosmological isotropy with gravitational waves and gamma-ray bursts
No significant cosmological anisotropy is found in the latest GW O4a and GRBWeb datasets using angular power spectra and two-point correlation functions, consistent with the cosmological principle.
-
Joint Detection and Characterization of the Standing Accretion Shock Instability for Core-Collapse Supernovae with cWB XP
cWB XP on LIGO O3/O4 data yields near-perfect SASI identification from GWs alone at O4 sensitivity (PD=0.97 at 10 kpc for PFI=0.01) and improves joint O3 detection over prior work.
-
Similar Fermi-GBM sGRBs to GW/sGRB 170817A in MeV-GeV energies
Identifies eight Fermi-GBM sGRBs similar to 170817A via hardness-ratio K-means clustering and estimates ~5 GW+sGRB events by end of O4.
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GWTC-5.0: An Introduction to Version 5.0 of the Gravitational-Wave Transient Catalog
GWTC-5.0 is a data release documenting over 300 gravitational-wave events from compact binary mergers observed through early 2025.
-
Open Data from LIGO, Virgo, and KAGRA through the Second Part of the Fourth Observing Run
LIGO-Virgo-KAGRA releases calibrated strain time series, noise-subtraction channels, and GWOSC v5.0 analysis products covering April 2024 to January 2025.