First measurement of the Hubble constant from gravitational wave-galaxy cross-correlations
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arXiv
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| Format: | Preprint |
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2025
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| author | de Matos, Isabela Santiago Dalang, Charles Baker, Tessa Abramo, Raul Ferri, João Quartin, Miguel |
| author_facet | de Matos, Isabela Santiago Dalang, Charles Baker, Tessa Abramo, Raul Ferri, João Quartin, Miguel |
| contents | We measure for the first time the Hubble constant ($H_0$) from the cross-correlation of galaxies and gravitational waves (GW), by applying the $\textit{Peak Sirens}$ method. This method consists of finding the peak of the 3D angular cross-spectrum $C_{\ell}(z,D_L)$ between the galaxy redshifts ($z$) and the GW luminosity distances ($D_L$). Using two GW events from the GWTC-3.0 catalog and the GLADE+ galaxy catalog, we make the first detection of the cross-correlation peak at $5.9σ$ confidence. This signal comes mostly from the best localized event in the catalog, GW190814, which alone provides a $3.4σ$ significance. Adding also the multimessenger event GW170817, but without using its known redshift, we find $H_0 = 67^{+18}_{-15}$ km s$^{-1}$Mpc$^{-1}$ and the first observational constraint on the GW bias, $b_{\rm gw} < 4.3$ at 95% CI. These measurements set the stage for future novel cosmological constraints with this technique. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_15380 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | First measurement of the Hubble constant from gravitational wave-galaxy cross-correlations de Matos, Isabela Santiago Dalang, Charles Baker, Tessa Abramo, Raul Ferri, João Quartin, Miguel Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology We measure for the first time the Hubble constant ($H_0$) from the cross-correlation of galaxies and gravitational waves (GW), by applying the $\textit{Peak Sirens}$ method. This method consists of finding the peak of the 3D angular cross-spectrum $C_{\ell}(z,D_L)$ between the galaxy redshifts ($z$) and the GW luminosity distances ($D_L$). Using two GW events from the GWTC-3.0 catalog and the GLADE+ galaxy catalog, we make the first detection of the cross-correlation peak at $5.9σ$ confidence. This signal comes mostly from the best localized event in the catalog, GW190814, which alone provides a $3.4σ$ significance. Adding also the multimessenger event GW170817, but without using its known redshift, we find $H_0 = 67^{+18}_{-15}$ km s$^{-1}$Mpc$^{-1}$ and the first observational constraint on the GW bias, $b_{\rm gw} < 4.3$ at 95% CI. These measurements set the stage for future novel cosmological constraints with this technique. |
| title | First measurement of the Hubble constant from gravitational wave-galaxy cross-correlations |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2512.15380 |