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First measurement of the Hubble constant from a dark standard siren using the Dark Energy Survey galaxies and the LIGO/Virgo binary-black-hole merger GW170814

The DES Collaboration, The LIGO Scientific Collaboration, The Virgo Collaboration, Soares-Santos, M., Palmese, A., Hartley, W., et al. (2019). First measurement of the Hubble constant from a dark standard siren using the Dark Energy Survey galaxies and the LIGO/Virgo binary-black-hole merger GW170814. The Astrophysical Journal Letters, 876(1): L7. doi:10.3847/2041-8213/ab14f1.

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### Creators

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Creators:
The DES Collaboration, Author
The LIGO Scientific Collaboration, Author
The Virgo Collaboration, Author
Soares-Santos, M., Author
Palmese, A., Author
Hartley, W., Author
Annis, J., Author
Garcia-Bellido, J., Author
Lahav, O., Author
Doctor, Z., Author
Lin, H., Author
Fishbach, M., Author
Pereira, M. E. S., Author
Garcia, A., Author
Herner, K., Author
Kessler, R., Author
Peiris, H. V., Author
Sako, M., Author
Allam, S., Author
Brout, D., Author
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010
2Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290
3Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011
4Binary Merger Observations and Numerical Relativity, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_2461691
5Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013

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Free keywords: Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO
Abstract: We present a multi-messenger measurement of the Hubble constant H_0 using the binary-black-hole merger GW170814 as a standard siren, combined with a photometric redshift catalog from the Dark Energy Survey (DES). The luminosity distance is obtained from the gravitational wave signal detected by the LIGO/Virgo Collaboration (LVC) on 2017 August 14, and the redshift information is provided by the DES Year 3 data. Black-hole mergers such as GW170814 are expected to lack bright electromagnetic emission to uniquely identify their host galaxies and build an object-by-object Hubble diagram. However, they are suitable for a statistical measurement, provided that a galaxy catalog of adequate depth and redshift completion is available. Here we present the first Hubble parameter measurement using a black-hole merger. Our analysis results in $H_0 = 75.2^{+39.5}_{-32.4}~{\rm km~s^{-1}~Mpc^{-1}}$, which is consistent with both SN Ia and CMB measurements of the Hubble constant. The quoted 68% credible region comprises 60% of the uniform prior range [20,140] ${\rm km~s^{-1}~Mpc^{-1}}$. This result shows that even a single dark siren can provide a constraint on the Hubble constant, albeit a weak one. Future combinations of many sirens will lead to improved constraints. A multifold increase in the LVC event detection rate is expected in the coming years, and this bodes well since future combinations of many additional sirens will lead to improved constraints.

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Dates: 2019-01-062019
Publication Status: Published in print
Pages: 19 pages, 3 Figures, submitted to ApJL
Publishing info: -
Rev. Method: -
Identifiers: arXiv: 1901.01540
URI: http://arxiv.org/abs/1901.01540
DOI: 10.3847/2041-8213/ab14f1
Degree: -

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### Source 1

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Title: The Astrophysical Journal Letters
Source Genre: Journal
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Pages: - Volume / Issue: 876 (1) Sequence Number: L7 Start / End Page: - Identifier: -