H0LiCOW XII. Lens mass model of WFI2033-4723 and blind measurement of its time-delay distance and H-0

Rusu, Cristian E.; Wong, Kenneth C.; Bonvin, Vivien; Sluse, Dominique; Suyu, Sherry H.; Fassnacht, Christopher D.; Chan, James H. H.; Hilbert, Stefan; Auger, Matthew W.; Sonnenfeld, Alessandro; Birrer, Simon; Courbin, Frederic; Treu, Tommaso; Chen, Geoff C-F; Halkola, Aleksi; Koopmans, Leon V. E.; Marshall, Philip J. und Shajib, Anowar J. (2020): H0LiCOW XII. Lens mass model of WFI2033-4723 and blind measurement of its time-delay distance and H-0. In: Monthly Notices of the Royal Astronomical Society, Bd. 498, Nr. 1: S. 1440-1468

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 yr 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 per cent. This translates to a Hubble constant H-0 = 71.6(-4.9)(+3.8) km s(-1) Mpc(-1), assuming a flat Lambda CDM cosmology with a uniform prior on Omega(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).

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 0035-8711
• Sprache: Englisch