2016

H0LiCOW V. New COSMOGRAIL time delays of HE0435-1223: $H_0$ to 3.8% precision from strong lensing in a flat $\Lambda$CDM model

Bonvin, V., Courbin, F., Suyu, S. H. et al.

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We present a new measurement of the Hubble Constant H0 and other cosmological parameters based on the joint analysis of three multiply-imaged quasar systems with measured gravitational time delays.

  • First, we measure the time delay of HE0435-1223 from 13-year light curves obtained as part of the COSMOGRAIL project.
  • Companion papers detail the modeling of the main deflectors and line of sight effects, and how these data are combined to determine the time-delay distance of HE 0435-1223.
  • Crucially, the measurements are carried out blindly with respect to cosmological parameters in order to avoid confirmation bias.

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