Implements full-Stokes SGWB map-making for ground-based networks, applies to LVK O3 data, and constrains polarized angular spectra while showing intensity-only models can be biased.
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Detection methods for stochastic gravitational-wave backgrounds: a unified treatment
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abstract
We review detection methods that are currently in use or have been proposed to search for a stochastic background of gravitational radiation. We consider both Bayesian and frequentist searches using ground-based and space-based laser interferometers, spacecraft Doppler tracking, and pulsar timing arrays; and we allow for anisotropy, non-Gaussianity, and non-standard polarization states. Our focus is on relevant data analysis issues, and not on the particular astrophysical or early Universe sources that might give rise to such backgrounds. We provide a unified treatment of these searches at the level of detector response functions, detection sensitivity curves, and, more generally, at the level of the likelihood function, since the choice of signal and noise models and prior probability distributions are actually what define the search. Pedagogical examples are given whenever possible to compare and contrast different approaches. We have tried to make the article as self-contained and comprehensive as possible, targeting graduate students and new researchers looking to enter this field.
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representative citing papers
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Detecting Chiral Gravitational Wave Background with a Dipole Pulsar Timing Array
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Population statistics of nanohertz gravitational wave sources
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A thorough investigation of cross-correlation estimators for stochastic gravitational-wave background searches in ground-based detector data
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Entanglement, Discord, and Residual Coherence in Scalar-Induced Gravitational Waves
Residual anomalous coherence in scalar perturbations imprints on scalar-induced tensor modes, producing a correlated gravitational-wave background with nontrivial covariance and phase structure instead of a simple spectral shift.
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Constraints on primordial black holes from the first part of LIGO-Virgo-KAGRA fourth observing run
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Are PTA measurements sensitive to gravitational wave non-Gaussianities?
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Photon counting readout for detection and inference of gravitational waves from neutron star merger remnants
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Isotropy, anisotropies and non-Gaussianity in the scalar-induced gravitational-wave background: diagrammatic approach for primordial non-Gaussianity up to arbitrary order
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Exploring the statistical anisotropy of primordial curvature perturbations with pulsar timing arrays
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Inflaton Accretion onto Primordial Black Holes During Reheating
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Primary gravitational waves at high frequencies I: Origin of suppression in the power spectrum
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Sensitivity forecasts for gravitational-wave detectors to dark matter decaying into gravitons
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Impact of facility timing and coordination for next-generation gravitational-wave detectors
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Precision Solar System Dynamics for Ultralight Dark Matter Search
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Synergies Between Pulsar Timing Array and Astrometry
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The impact of waveform systematics and Gaussian noise on the interpretation of GW231123
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Not too close! Evaluating the impact of the baseline on the localization of binary black holes by next-generation gravitational-wave detectors
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