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Status: Unchecked ×Keyword: lensed quasars ×Clear all

2 claims from 1 paper

1. Physics and Astronomy › Cosmology and Gravitation Theories

   H0LiCOW – XIII. A 2.4 per cent measurement of H0 from lensed quasars: 5.3σ tension between early- and late-Universe probes

   Wong, Suyu, Chen et al. · Monthly Notices of the Royal Astronomical Society · 2019

   The paper combines six gravitationally lensed quasars with measured time delays to measure the Hubble constant and other cosmological parameters, and compares the result with other probes.

   Unchecked2 claims
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   1. UncheckedSix lensed quasars give a Hubble constant of 73.3 (+1.7/−1.8) in flat ΛCDM, matching supernova ladder values but in 3.1σ tension with Planck.“In a flat $Λ$CDM cosmology, we find $H_{0} = 73.3_{-1.8}^{+1.7}$, a 2.4% precision measurement, in agreement with local measurements of $H_{0}$ from type Ia supernovae calibrated by the distance ladder, but in $3.1σ$ tension with $Planck$ observations of the cosmic microwave background (CMB).”
   2. UncheckedLetting the Universe's spatial geometry be curved, rather than flat, does not remove the mismatch between lensed-quasar and Planck values of the Hubble constant.“Allowing for spatial curvature does not resolve the tension with $Planck$.”