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

The local expansion rate of the Universe is parametrized by the Hubble constant, \(H_0\), the ratio between recession velocity and distance. Different techniques lead to inconsistent estimates of \(H_0\). Observations of Type Ia supernovae (SNe) can be used to measure \(H_0\), but this requires an e...

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Bibliographic Details
Published in:arXiv.org 2019-09
Main Authors: Jee, Inh, Suyu, Sherry, Komatsu, Eiichiro, Fassnacht, Christopher D, Hilbert, Stefan, Koopmans, Léon V E
Format: Article
Language:English
Subjects:
Big Bang theory
Calibration
Expanding universe theory
Gravitation
Gravitational lenses
Hubble constant
Recession
Supernovae
Online Access:Get full text
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Summary:The local expansion rate of the Universe is parametrized by the Hubble constant, \(H_0\), the ratio between recession velocity and distance. Different techniques lead to inconsistent estimates of \(H_0\). Observations of Type Ia supernovae (SNe) can be used to measure \(H_0\), 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, \(810^{+160}_{-130}\) and \(1230^{+180}_{-150}\)~Mpc, at redshifts of \(z=0.295\) and \(0.6304\). Using these absolute distances to calibrate 740 previously-measured relative distances to SNe, we measure the Hubble constant to be \(H_0=82.4^{+8.4}_{-8.3} ~{\rm km\,s^{-1}\,Mpc^{-1}}\).
ISSN:2331-8422
DOI:10.48550/arxiv.1909.06712