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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

Citation

Soares-Santos, M and Palmese, A and Siellez, K and The LIGO Scientific Collaboration and the Virgo Collaboration, 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) Article L7. ISSN 2041-8205 (2019) [Refereed Article]


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DOI: doi:10.3847/2041-8213/ab14f1

Abstract

We present a multi-messenger measurement of the Hubble constant H0 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 Laser Interferometer Gravitational-Wave Observatory (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 H0=75+40-32km s-1 Mpc-1, which is consistent with both SN Ia and cosmic microwave background measurements of the Hubble constant. The quoted 68% credible region comprises 60% of the uniform prior range [20, 140] km s-1 Mpc-1, and it depends on the assumed prior range. If we take a broader prior of [10, 220] km s-1 Mpc-1, we find H0=78+96-24km s-1 Mpc-1, (57% of the prior range). Although a weak constraint on the Hubble constant from a single event is expected using the dark siren method, a multifold increase in the LVC event rate is anticipated in the coming years and combinations of many sirens will lead to improved constraints on H0.

Item Details

Item Type:Refereed Article
Keywords:catalogs, cosmology, observations, gravitational waves, surveys
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:General relativity and gravitational waves
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Siellez, K (Dr Karelle Siellez)
ID Code:150406
Year Published:2019
Web of Science® Times Cited:91
Deposited By:Physics
Deposited On:2022-06-13
Last Modified:2022-06-13
Downloads:0

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