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CLASS_GWB: robust modeling of the astrophysical gravitational wave background anisotropies

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arxiv 2110.15059 v1 pith:SRDLRHRK submitted 2021-10-26 gr-qc astro-ph.CO

classification gr-qcastro-ph.CO
keywords gravitationalwaveastrophysicalanisotropiessourcesbackgroundaccountingclass
verification ladder T0 review T1 audit T2 compute T3 formal
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Gravitational radiation offers a unique possibility to study the large-scale structure of the Universe, gravitational wave sources and propagation in a completely novel way. Given that gravitational wave maps contain a wealth of astrophysical and cosmological information, interpreting this signal requires a non-trivial multidisciplinary approach. In this work we present the complete computation of the signal produced by compact object mergers accounting for a detailed modelling of the astrophysical sources and for cosmological perturbations. We develop the CLASS_GWB code, which allows for the computation of the anisotropies of the astrophysical gravitational wave background, accounting for source and detector properties, as well as effects of gravitational wave propagation. We apply our numerical tools to robustly compute the angular power spectrum of the anisotropies of the gravitational wave background generated by astrophysical sources in the LIGO-Virgo frequency band. The end-to-end theoretical framework we present can be easily applied to different sources and detectors in other frequency bands. Moreover, the same numerical tools can be used to compute the anisotropies of gravitational wave maps of the sky made using resolved events.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Inferring the stochastic gravitational-wave background from eccentric stellar-mass binary black holes with spaceborne detectors

    gr-qc 2025-10 conditional novelty 6.0 of 10

    Eccentric black-hole-binary backgrounds from globular clusters and isolated evolution would look like power-law noise for TianQin/LISA/Taiji, but AGN-formed binaries produce a turnover that LISA and Taiji can distinguish.

  2. Bias from small-scale leakage in Pulsar Timing Array maps

    astro-ph.IM 2025-10 conditional novelty 6.0 of 10

    Unmodeled small-scale gravitational-wave power systematically inflates reconstructed large-scale angular power spectra in pulsar timing array anisotropy searches.

  3. Estimating the gravitational wave background anisotropy: a Bayesian approach boosted by cross-correlation angular power spectrum

    astro-ph.CO 2024-12 conditional novelty 6.0 of 10

    A new likelihood function estimates GWB anisotropy angular power spectra directly from detector data, and cross-correlation with the CMB can make the quadrupole measurable with four years of LISA data.

  4. \texttt{GWBird}: a toolkit for the characterization of the Stochastic Gravitational Wave Background for Ground, Space, and Pulsar Timing Array detectors

    astro-ph.IM 2025-07 conditional novelty 5.0 of 10

    A new, unified Python package computes overlap reduction functions, power-law integrated sensitivity curves, and angular sensitivity curves for ground, space, and pulsar timing array detectors across all gravitational...

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