A Hubble constant measurement from superluminal motion of the jet in GW170817

@article{Hotokezaka2019AHC,
  title={A Hubble constant measurement from superluminal motion of the jet in GW170817},
  author={Kenta Hotokezaka and Ehud Nakar and Ore Gottlieb and Samaya M. Nissanke and Kento Masuda and Gregg W. Hallinan and Kunal P. Mooley and Adam T. Deller},
  journal={Nature Astronomy},
  year={2019},
  pages={1-5}
}
The Hubble constant (H0) measures the current expansion rate of the Universe, and plays a fundamental role in cosmology. Tremendous effort has been dedicated over the past decades to measure H0 (refs. 1–10). Gravitational wave (GW) sources accompanied by electromagnetic (EM) counterparts offer an independent standard siren measurement of H0 (refs. 11–13), as demonstrated following the discovery of the neutron star merger, GW170817 (refs. 14–16). This measurement does not assume a cosmological… 

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