A SHARP view of H0LiCOW: H0 from three time-delay gravitational lens systems with adaptive optics imaging

By G. Chen, C. Fassnacht, Sherry H. Suyu, C. Rusu, J. Chan, Kenneth C. Wong, M. Auger, Stefan Hilbert, Vivien Bonvin, Simon Birrer and 13 more. Monthly notices of the Royal Astronomical Society, 2019

177 citations recorded by the source corpus.

We present the measurement of the Hubble constant, H0, with three strong gravitational lens systems. We describe a blind analysis of both PG 1115+080 and HE 0435−1223 as well as an extension of our previous analysis of RXJ 1131−1231. For each lens, we combine new adaptive optics (AO) imaging from the Keck Telescope, obtained as part of the SHARP (Strong-lensing High Angular Resolution Programme) AO effort, with Hubble Space Telescope (HST) imaging, velocity dispersion measurements, and a description of the line-of-sight mass distribution to build an accurate and precise lens mass model. This mass model is then combined with the COSMOGRAIL-measured time delays in these systems to determine H0. We do both an AO-only and an AO + HST analysis of the systems and find that AO and HST results are consistent. After unblinding, the AO-only analysis gives $H_{0}=82.8^{+9.4}_{-8.3}~\rm km\, s^{-1}\, Mpc^{-1}$ for PG 1115+080, $H_{0}=70.1^{+5.3}_{-4.5}~\rm km\, s^{-1}\, Mpc^{-1}$ for HE 0435−1223, and $H_{0}=77.0^{+4.0}_{-4.6}~\rm km\, s^{-1}\, Mpc^{-1}$ for RXJ 1131−1231. The joint AO-only result for the three lenses is $H_{0}=75.6^{+3.2}_{-3.3}~\rm km\, s^{-1}\, Mpc^{-1}$. The joint result of the AO + HST analysis for the three lenses is $H_{0}=76.8^{+2.6}_{-2.6}~\rm km\, s^{-1}\, Mpc^{-1}$. All of these results assume a flat Λ cold dark matter cosmology with a uniform prior on Ωm in [0.05, 0.5] and H0 in [0, 150] $\rm km\, s^{-1}\, Mpc^{-1}$. This work is a collaboration of the SHARP and H0LiCOW teams, and shows that AO data can be used as the high-resolution imaging component in lens-based measurements of H0. The full time-delay cosmography results from a total of six strongly lensed systems are presented in a companion paper.

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics

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Citations in the corpus

TDCOSMO IV: Hierarchical time-delay cosmography -- joint inference of the Hubble constant and galaxy density profiles (2020, methodology): “The timedelay measurement is presented by Bonvin et al. (2018), while the line-of-sight analysis by Chen et al. (2019).”
H0LiCOW – XIII. A 2.4 per cent measurement of H0 from lensed quasars: 5.3σ tension between early- and late-Universe probes (2019, methodology): “Two of the four lenses analysed previously, HE 0435−1223 (Wong et al. 2017, hereafter H0LiCOW IV) and RXJ1131−1231 (Suyu et al. 2014), are reanalysed using new AO data (Chen et al. 2019).”
TDCOSMO. I. An exploration of systematic uncertainties in the inference of $H_0$ from time-delay cosmography (2019, methodology): “This is consistent with the findings of the H0LiCOW, SHARP, and STRIDES collaborations so far (Suyu et al. 2014; Wong et al. 2017; Birrer et al. 2019; Chen et al. 2019; Rusu et al. 2020; Shajib et al. 2020).”
A buyer’s guide to the Hubble constant (2021, background): “Some other choices must be made, such as which of the galaxies along the line of sight will be modelled and which will be absorbed into the line of sight mass average (Chen et al. 2019).”
Mining for Dark Matter Substructure: Inferring Subhalo Population Properties from Strong Lenses with Machine Learning (2019, background): “…lens sample can be used to perform cosmological parameter estimation while accounting for substructure eﬀects and in particular to independently constrain the Hubble constant (Chen et al. 2019; Wong et al. 2019) through its dependence on the angular diameter distance scales in lensing systems.”