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Angular power spectrum of gravitational-wave transient sources as a probe of the large-scale structure

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arxiv 2305.02652 v2 pith:V26RTJSF submitted 2023-05-04 astro-ph.CO gr-qc

Yanyan Zheng , Nikolaos Kouvatsos , Jacob Golomb , Marco Cavaglià , Arianna I. Renzini , Mairi Sakellariadou This is my paper · ORCID
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keywords angulardistributiongravitational-wavemethodlarge-scalepowersourcesspectrum
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We present a new, simulation-based inference method to compute the angular power spectrum of the distribution of foreground gravitational-wave transient events. As a first application of this method, we use the binary black hole mergers observed during the LIGO, Virgo, and KAGRA third observation run to test the spatial distribution of these sources. We find no evidence for anisotropy in their angular distribution. We discuss further applications of this method to investigate other gravitational-wave source populations and their correlations to the cosmological large-scale structure.

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  1. Simulation-based inference on warm dark matter from HERA forecasts

    astro-ph.CO 2024-12 conditional novelty 5.0 of 10

    Using neural ratio estimation on mock HERA power spectra, the authors forecast 95% lower bounds on the thermal WDM mass that exceed the 5.3 keV Lyman-alpha limit when the galaxy threshold mass Mturn is below 1e8 M_sun.

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