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arXiv · 1905.09338

H0LiCOW XII. Lens mass model of WFI2033-4723 and blind measurement of its time-delay distance and $H_0$

Cristian E. Rusu·Kenneth C. Wong·Vivien Bonvin·Dominique Sluse·Sherry H. Suyu·Christopher D. Fassnacht·James H. H. Chan·Stefan Hilbert·Matthew W. Auger·Alessandro Sonnenfeld·Simon Birrer·Frederic Courbin·Tommaso Treu·Geoff C. -F. Chen·Aleksi Halkola·Leon V. E. Koopmans·Philip J. Marshall·Anowar J. Shajib
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Abstract

We present the lens mass model of the quadruply-imaged gravitationally lensed quasar WFI2033-4723, and perform a blind cosmographical analysis based on this system. Our analysis combines (1) time-delay measurements from 14 years of data obtained by the COSmological MOnitoring of GRAvItational Lenses (COSMOGRAIL) collaboration, (2) high-resolution $\textit{Hubble Space Telescope}$ imaging, (3) a measurement of the velocity dispersion of the lens galaxy based on ESO-MUSE data, and (4) multi-band, wide-field imaging and spectroscopy characterizing the lens environment. We account for all known sources of systematics, including the influence of nearby perturbers and complex line-of-sight structure, as well as the parametrization of the light and mass profiles of the lensing galaxy. After unblinding, we determine the effective time-delay distance to be $4784_{-248}^{+399}~\mathrm{Mpc}$, an average precision of $6.6\%$. This translates to a Hubble constant $H_{0} = 71.6_{-4.9}^{+3.8}~\mathrm{km~s^{-1}~Mpc^{-1}}$, assuming a flat $Λ$CDM cosmology with a uniform prior on $Ω_\mathrm{m}$ in the range [0.05, 0.5]. This work is part of the $H_0$ Lenses in COSMOGRAIL's Wellspring (H0LiCOW) collaboration, and the full time-delay cosmography results from a total of six strongly lensed systems are presented in a companion paper (H0LiCOW XIII).

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Cristian E. Rusu, Kenneth C. Wong, Vivien Bonvin, Dominique Sluse, Sherry H. Suyu, Christopher D. Fassnacht, James H. H. Chan, Stefan Hilbert, Matthew W. Auger, Alessandro Sonnenfeld, Simon Birrer, Frederic Courbin, Tommaso Treu, Geoff C. -F. Chen, Aleksi Halkola, Leon V. E. Koopmans, Philip J. Marshall, Anowar J. Shajib. 2019-12-08. H0LiCOW XII. Lens mass model of WFI2033-4723 and blind measurement of its time-delay distance and $H_0$. https://doi.org/10.1093/mnras%2Fstz3451

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