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First measurement of the Hubble constant from a combined weak lensing and gravitational-wave standard siren analysis

Felipe Andrade-Oliveira, David Sanchez-Cid, Danny Laghi, Marcelle Soares-Santos

Abstract

We present a new measurement of the Hubble constant ($H_0$) resulting from the first joint analysis of standard sirens with weak gravitational lensing and galaxy clustering observables comprising three two-point correlation functions (3$\times$2pt). For the 3$\times$2pt component of the analysis, we use data from the Dark Energy Survey (DES) Year 3 release. For the standard sirens component, we use data from the Gravitational-Wave Transient Catalog 4.0 released by the LIGO-Virgo-KAGRA (LVK) Collaboration. For GW170817, the only standard siren for which extensive electromagnetic follow-up observations exist, we also use measurements of the host galaxy redshift and inclination angle estimates derived from observations of a superluminal jet from its remnant. Our joint analysis yields $H_0 = 67.9^{+4.4}_{-4.3}$~km~s$^{-1}$~Mpc$^{-1}$, a $6.4\%$ measurement, while improving the DES constraint on the total abundance of matter $Ω_m$ by $22\%$. Removing the jet information degrades the $H_0$ precision to $9.9\%$. The measurement of $H_0$ remains a central problem in cosmology with a multitude of approaches being vigorously pursued in the community aiming to reconcile significantly discrepant measurements at the percent-level. In light of the impending new data releases from DES and LVK, and anticipating much more constraining power from 3$\times$2pt observables using newly commissioned survey instruments, we demonstrate that incorporating standard sirens into the cosmology framework of large cosmic surveys is a viable route towards that goal.

First measurement of the Hubble constant from a combined weak lensing and gravitational-wave standard siren analysis

Abstract

We present a new measurement of the Hubble constant () resulting from the first joint analysis of standard sirens with weak gravitational lensing and galaxy clustering observables comprising three two-point correlation functions (32pt). For the 32pt component of the analysis, we use data from the Dark Energy Survey (DES) Year 3 release. For the standard sirens component, we use data from the Gravitational-Wave Transient Catalog 4.0 released by the LIGO-Virgo-KAGRA (LVK) Collaboration. For GW170817, the only standard siren for which extensive electromagnetic follow-up observations exist, we also use measurements of the host galaxy redshift and inclination angle estimates derived from observations of a superluminal jet from its remnant. Our joint analysis yields ~km~s~Mpc, a measurement, while improving the DES constraint on the total abundance of matter by . Removing the jet information degrades the precision to . The measurement of remains a central problem in cosmology with a multitude of approaches being vigorously pursued in the community aiming to reconcile significantly discrepant measurements at the percent-level. In light of the impending new data releases from DES and LVK, and anticipating much more constraining power from 32pt observables using newly commissioned survey instruments, we demonstrate that incorporating standard sirens into the cosmology framework of large cosmic surveys is a viable route towards that goal.
Paper Structure (12 sections, 2 equations, 2 figures, 1 table)

This paper contains 12 sections, 2 equations, 2 figures, 1 table.

Table of Contents

  1. Introduction
  2. Data
  3. DES Y3
  4. GWTC-4.0
  5. GW170817 EM counterpart information
  6. Methods
  7. Weak lensing and galaxy clustering
  8. Spectral sirens
  9. Bright siren
  10. Cosmological inference
  11. Results
  12. Conclusions

Figures (2)

  • Figure 1: Marginalised $H_0$ constraints from the $3 \times 2$pt analysis (blue), the spectral sirens plus GW170817 analysis (red), and their combination (black). Results obtained excluding the jet information are also shown (dashed lines). Orange and green bands are CMB Planck:2018vyg and SNe Ia Riess:2021jrx constraints, at 68% credible interval.
  • Figure 2: Marginalised constraints on $H_0$ and $\Omega_{\rm m}$ from the $3 \times 2$pt (blue), the standard sirens (red) and the combination (black). Results obtained without the GW170817 jet information are also shown (dashed). Contours show 1-$\sigma$ and 2-$\sigma$ credible levels.