Using simulated binary black hole mergers and neutral hydrogen maps, the radio sirens method constrains H0 to 8% precision with 3000 high-SNR events, offering a 90% improvement over standard dark siren analyses.
Cosmology with the angular cross-correlation of gravitational-wave and galaxy catalogs: forecasts for next-generation interferometers and the Euclid survey
7 Pith papers cite this work. Polarity classification is still indexing.
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abstract
We study the angular power spectrum of gravitational-wave and galaxy catalogs in tomographic redshift and distance bins as a probe of late-time cosmology, focusing specifically on next-generation ground-based interferometers in combination with the Euclid photometric survey. We assess the potential of this technique to constrain the Hubble constant and the matter energy density. Our analysis incorporates realistic gravitational-wave source populations, error modelling calibrated on recent detector designs, and accounts for nuisance parameters. We show that the tomographic angular cross-correlation could determine the Hubble constant to percent or sub-percent precision depending on the binning choice, configuration and operation time of gravitational-wave observatories. This conclusion holds even when marginalising over the unknown tracer biases, primordial power-spectrum parameters and baryon density. In particular, we show that the combination of the galaxy auto-correlation spectra and the cross-correlation of gravitational waves and galaxy surveys can lead to an improvement of up to a factor ${{\sim}}10$ in constraining power over either of the two probes taken individually. However, this prospect crucially relies on the presence of multiple gravitational-wave interferometers able to yield precise sky localisation. We also discuss the use of a spectroscopic redshift catalog, as well as the detectability of the clustering bias of gravitational-wave sources.
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New simulations show that cross-correlating gravitational wave background anisotropies with galaxy distributions can enable discovery at angular scales of 4-6 degrees with next-generation observatories.
The GW-galaxy cross-correlation method, unified with spectral sirens in a harmonic framework, can measure H0 to 1% and Omega_m to 5% precision with 2 years of data from next-generation detectors like Einstein Telescope and Cosmic Explorer.
Angular auto-correlation of gravitational wave sources decreases with lensing dispersion, and joint cross-correlation with galaxies partially breaks the degeneracy with source bias.
Forecasts that cross-correlating 3G GW dark sirens with CSST photometric galaxies yields 1.04% precision on H0 and 2.04% on Omega_m while also constraining GW clustering bias.
Analysis of 236 GW events from GWTC-5.0 constrains H0 to 71.0 +9.0/-7.1 km/s/Mpc and finds no evidence for modified gravitational-wave propagation.
Methodological choices in dark siren cross-correlations can mitigate biases in H0 inference when selection effects are built into the model and samples of precise events are sufficiently large.
citing papers explorer
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Radio sirens: inferring $H_0$ with binary black holes and neutral hydrogen in the era of the Einstein Telescope and the SKA Observatory
Using simulated binary black hole mergers and neutral hydrogen maps, the radio sirens method constrains H0 to 8% precision with 3000 high-SNR events, offering a 90% improvement over standard dark siren analyses.
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Prospects for multi-messenger discovery of the gravitational-wave background anisotropies via cross-correlation with galaxies
New simulations show that cross-correlating gravitational wave background anisotropies with galaxy distributions can enable discovery at angular scales of 4-6 degrees with next-generation observatories.
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A unified harmonic framework for dark siren cosmology
The GW-galaxy cross-correlation method, unified with spectral sirens in a harmonic framework, can measure H0 to 1% and Omega_m to 5% precision with 2 years of data from next-generation detectors like Einstein Telescope and Cosmic Explorer.
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Constraining the lensing dispersion from the angular clustering of binary black hole mergers
Angular auto-correlation of gravitational wave sources decreases with lensing dispersion, and joint cross-correlation with galaxies partially breaks the degeneracy with source bias.
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Synergy between CSST and third-generation gravitational-wave detectors: Inferring cosmological parameters using cross-correlation of dark sirens and galaxies
Forecasts that cross-correlating 3G GW dark sirens with CSST photometric galaxies yields 1.04% precision on H0 and 2.04% on Omega_m while also constraining GW clustering bias.
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GWTC-5.0: Constraints on the Cosmic Expansion Rate and Modified Gravitational-wave Propagation
Analysis of 236 GW events from GWTC-5.0 constrains H0 to 71.0 +9.0/-7.1 km/s/Mpc and finds no evidence for modified gravitational-wave propagation.
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Dark siren cross-correlations and the sensitivity of $H_0$ to methodological choices
Methodological choices in dark siren cross-correlations can mitigate biases in H0 inference when selection effects are built into the model and samples of precise events are sufficiently large.