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

DOI DOI DOI DOI DOI ほか29件をすべて表示 一部だけ表示 被引用文献16件 オープンアクセス

書誌事項

公開日
2019-04-26
権利情報
  • https://iopscience.iop.org/page/copyright
  • https://iopscience.iop.org/info/page/text-and-data-mining
DOI
  • 10.3847/2041-8213/ab14f1
  • 10.25916/sut.26250830.v1
  • 10.48550/arxiv.1901.01540
  • 10.25916/sut.26250830
  • 10.25916/sut.26250830.v2
公開者
American Astronomical Society

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説明

<jats:title>Abstract</jats:title> <jats:p>We present a multi-messenger measurement of the Hubble constant <jats:italic>H</jats:italic> <jats:sub>0</jats:sub> 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 <jats:inline-formula> <jats:tex-math> </jats:tex-math> </jats:inline-formula>, 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<jats:sup>−1</jats:sup> Mpc<jats:sup>−1</jats:sup>, and it depends on the assumed prior range. If we take a broader prior of [10, 220] km s<jats:sup>−1</jats:sup> Mpc<jats:sup>−1</jats:sup>, we find <jats:inline-formula> <jats:tex-math> </jats:tex-math> </jats:inline-formula> (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 <jats:italic>H</jats:italic> <jats:sub>0</jats:sub>.</jats:p>

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