TY - JOUR

T1 - A measurement of the Hubble constant from angular diameter distances to two gravitational lenses

AU - Jee, Inh

AU - Suyu, Sherry H.

AU - Komatsu, Eiichiro

AU - Fassnacht, Christopher D.

AU - Hilbert, Stefan

AU - Koopmans, Léon V.E.

N1 - Publisher Copyright:
© 2019 American Association for the Advancement of Science. All rights reserved.

PY - 2019/9/13

Y1 - 2019/9/13

N2 - The local expansion rate of the Universe is parametrized by the Hubble constant, H0, the ratio between recession velocity and distance. Different techniques lead to inconsistent estimates of H0. Observations of Type Ia supernovae (SNe) can be used to measure H0, but this requires an external calibrator to convert relative distances to absolute ones. We use the angular diameter distance to strong gravitational lenses as a suitable calibrator, which is only weakly sensitive to cosmological assumptions. We determine the angular diameter distances to two gravitational lenses, 810þ 160 130 and 1230þ 180 150 megaparsec, at redshifts z ¼ 0:295 and 0:6304. Using these absolute distances to calibrate 740 previously measured relative distances to SNe, we measure the Hubble constant to be H0 ¼ 82:4þ 8 8 : : 4 3 kilometers per second per megaparsec.

AB - The local expansion rate of the Universe is parametrized by the Hubble constant, H0, the ratio between recession velocity and distance. Different techniques lead to inconsistent estimates of H0. Observations of Type Ia supernovae (SNe) can be used to measure H0, but this requires an external calibrator to convert relative distances to absolute ones. We use the angular diameter distance to strong gravitational lenses as a suitable calibrator, which is only weakly sensitive to cosmological assumptions. We determine the angular diameter distances to two gravitational lenses, 810þ 160 130 and 1230þ 180 150 megaparsec, at redshifts z ¼ 0:295 and 0:6304. Using these absolute distances to calibrate 740 previously measured relative distances to SNe, we measure the Hubble constant to be H0 ¼ 82:4þ 8 8 : : 4 3 kilometers per second per megaparsec.

UR - http://www.scopus.com/inward/record.url?scp=85072148796&partnerID=8YFLogxK

U2 - 10.1126/science.aat7371

DO - 10.1126/science.aat7371

M3 - Article

C2 - 31515387

AN - SCOPUS:85072148796

SN - 0036-8075

VL - 365

SP - 1134

EP - 1138

JO - Science

JF - Science

IS - 6458

ER -