Article

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

Kenneth C. WongKavli IPMU (WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, JapanS. H. SuyuAcademia Sinica Institute of Astronomy and Astrophysics (ASIAA), 11F of ASMAB, No. 1, Section 4, Roosevelt Road, Taipei 10617, TaiwanGeoff C.-F. ChenDepartment of Physics, University of California, Davis, CA 95616, USACristian E. RusuDepartment of Physics, University of California, Davis, CA 95616, USAMartin MillonInstitute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, CH-1290 Versoix, SwitzerlandDominique SluseV. BonvinInstitute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, CH-1290 Versoix, SwitzerlandC. D. FassnachtDepartment of Physics, University of California, Davis, CA 95616, USAS. TaubenbergerMax-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str 1, D-85748 Garching, GermanyMatthew W. AugerInstitute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UKSimon BirrerDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAJ. H. H. ChanInstitute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, CH-1290 Versoix, SwitzerlandF. CourbinInstitute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, CH-1290 Versoix, SwitzerlandStefan HilbertExzellenzcluster Universe, Boltzmannstr 2, D-85748 Garching, GermanyO. TihhonovaInstitute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, CH-1290 Versoix, SwitzerlandTommaso TreuDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAAdriano AgnelloXuheng DingDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAInh JeeMax-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str 1, D-85748 Garching, GermanyEiichiro KomatsuKavli IPMU (WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, JapanAnowar J. ShajibDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAAlessandro SonnenfeldLeiden Observatory, Leiden University, Niels Bohrweg 2, NL-2333 CA Leiden, the NetherlandsR. D. BlandfordKavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, CA 94035, USAL. V. E. KoopmansKapteyn Astronomical Institute, University of Groningen, PO Box 800, NL-9700 AV Groningen, the NetherlandsPhilip J. MarshallKavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, CA 94035, USAGeorges MeylanInstitute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, CH-1290 Versoix, Switzerland

2019en

ABI

Abstract

ABSTRACT We present a measurement of the Hubble constant (H0) and other cosmological parameters from a joint analysis of six gravitationally lensed quasars with measured time delays. All lenses except the first are analysed blindly with respect to the cosmological parameters. In a flat Λ cold dark matter (ΛCDM) cosmology, we find $H_{0} = 73.3_{-1.8}^{+1.7}~\mathrm{km~s^{-1}~Mpc^{-1}}$, a $2.4{{\ \rm per\ cent}}$ precision measurement, in agreement with local measurements of H0 from type Ia supernovae calibrated by the distance ladder, but in 3.1σ tension with Planck observations of the cosmic microwave background (CMB). This method is completely independent of both the supernovae and CMB analyses. A combination of time-delay cosmography and the distance ladder results is in 5.3σ tension with Planck CMB determinations of H0 in flat ΛCDM. We compute Bayes factors to verify that all lenses give statistically consistent results, showing that we are not underestimating our uncertainties and are able to control our systematics. We explore extensions to flat ΛCDM using constraints from time-delay cosmography alone, as well as combinations with other cosmological probes, including CMB observations from Planck, baryon acoustic oscillations, and type Ia supernovae. Time-delay cosmography improves the precision of the other probes, demonstrating the strong complementarity. Allowing for spatial curvature does not resolve the tension with Planck. Using the distance constraints from time-delay cosmography to anchor the type Ia supernova distance scale, we reduce the sensitivity of our H0 inference to cosmological model assumptions. For six different cosmological models, our combined inference on H0 ranges from ∼73 to 78 km s−1 Mpc−1, which is consistent with the local distance ladder constraints.

Identifiers

DOI: 10.1093/mnras/stz3094

Citations and references

Cited by 40 references

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