Cosmology and modified gravity with dark sirens from GWTC-3

2022/03/17 by Michele Mancarella, Mancarella, Michele, Andreas Finke +9 · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Pulsars and Gravitational Waves Research #Radio Astronomy Observations and Technology

paper · pdf · doi:10.48550/arxiv.2203.09238

openalex publication_date 2022/03/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present the latest measurements of the Hubble parameter and of the parameter Ξ₀ describing modified gravitational wave propagation, obtained from the third gravitational wave transient catalog, GWTC-3, using the correlation with galaxy catalogs and information from the source-frame mass distribution of binary black holes. The latter leads to the tightest bound on Ξ₀ so far, i.e. Ξ₀ = 1.2^+0.7_-0.7 with a flat prior on Ξ₀, and Ξ₀ = 1.0^+0.4_-0.8 with a prior uniform in logΞ₀ (Max posterior and 68% HDI). The measurement of H₀ is dominated by the single bright siren GW170817, resulting in H₀=67⁺⁹_-6 \rm km s^-1 Mpc when combined with the galaxy catalog.

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• Listening Across the Cosmic Time: Standard Sirens from Ground- and Space-Based Missions in the Next Decade

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