Papers › H0LiCOW XII. Lens mass model of WFI2033-4723 and blind measurement of its time-delay...
H0LiCOW XII. Lens mass model of WFI2033-4723 and blind measurement of its time-delay distance and H₀
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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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 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 Mpc, an average precision of 6.6%. This translates to a Hubble constant H₀ = 71.6_(-4.9)^(+3.8) km s⁻¹ Mpc⁻¹, assuming a flat ΛCDM cosmology with a uniform prior on Ωₘ in the range [0.05, 0.5]. This work is part of the H₀ 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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