Constraints on the Cosmic Expansion History from GWTC–3

書誌事項

公開日
2023-06-01
資源種別
journal article
権利情報
  • http://creativecommons.org/licenses/by/4.0/
  • https://iopscience.iop.org/info/page/text-and-data-mining
DOI
  • 10.3847/1538-4357/ac74bb
  • 10.48550/arxiv.2111.03604
公開者
American Astronomical Society

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説明

<jats:title>Abstract</jats:title> <jats:p>We use 47 gravitational wave sources from the Third LIGO–Virgo–Kamioka Gravitational Wave Detector Gravitational Wave Transient Catalog (GWTC–3) to estimate the Hubble parameter <jats:italic>H</jats:italic>(<jats:italic>z</jats:italic>), including its current value, the Hubble constant <jats:italic>H</jats:italic> <jats:sub>0</jats:sub>. Each gravitational wave (GW) signal provides the luminosity distance to the source, and we estimate the corresponding redshift using two methods: the redshifted masses and a galaxy catalog. Using the binary black hole (BBH) redshifted masses, we simultaneously infer the source mass distribution and <jats:italic>H</jats:italic>(<jats:italic>z</jats:italic>). The source mass distribution displays a peak around 34 <jats:italic>M</jats:italic> <jats:sub>⊙</jats:sub>, followed by a drop-off. Assuming this mass scale does not evolve with the redshift results in a <jats:italic>H</jats:italic>(<jats:italic>z</jats:italic>) measurement, yielding <jats:inline-formula> <jats:tex-math> </jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>H</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>0</mml:mn> </mml:mrow> </mml:msub> <mml:mo>=</mml:mo> <mml:msubsup> <mml:mrow> <mml:mn>68</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>8</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>12</mml:mn> </mml:mrow> </mml:msubsup> <mml:mspace width="0.50em"/> <mml:mi>km</mml:mi> <mml:mspace width="0.33em"/> <mml:mspace width="0.25em"/> <mml:mspace width="0.33em"/> <mml:msup> <mml:mrow> <mml:mi mathvariant="normal">s</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:msup> <mml:mspace width="0.25em"/> <mml:msup> <mml:mrow> <mml:mi>Mpc</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:msup> </mml:math> </jats:inline-formula> (68% credible interval) when combined with the <jats:italic>H</jats:italic> <jats:sub>0</jats:sub> measurement from GW170817 and its electromagnetic counterpart. This represents an improvement of 17% with respect to the <jats:italic>H</jats:italic> <jats:sub>0</jats:sub> estimate from GWTC–1. The second method associates each GW event with its probable host galaxy in the catalog <jats:monospace>GLADE+</jats:monospace>, statistically marginalizing over the redshifts of each event’s potential hosts. Assuming a fixed BBH population, we estimate a value of <jats:inline-formula> <jats:tex-math> </jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>H</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>0</mml:mn> </mml:mrow> </mml:msub> <mml:mo>=</mml:mo> <mml:msubsup> <mml:mrow> <mml:mn>68</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>6</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>8</mml:mn> </mml:mrow> </m ...

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