H0LiCOW IV. Lens mass model of HE 0435-1223 and blind measurement of its time-delay distance for cosmology

19 Dec 2016 Wong Kenneth C. Suyu Sherry H. Auger Matthew W. Bonvin Vivien Courbin Frederic Fassnacht Christopher D. Halkola Aleksi Rusu Cristian E. Sluse Dominique Sonnenfeld Alessandro Treu Tommaso Collett Thomas E. Hilbert Stefan Koopmans Leon V. E. Marshall Philip J. Rumbaugh Nicholas

Strong gravitational lenses with measured time delays between the multiple images allow a direct measurement of the time-delay distance to the lens, and thus a measure of cosmological parameters, particularly the Hubble constant, $H_{0}$. We present a blind lens model analysis of the quadruply-imaged quasar lens HE 0435-1223 using deep Hubble Space Telescope imaging, updated time-delay measurements from the COSmological MOnitoring of GRAvItational Lenses (COSMOGRAIL), a measurement of the velocity dispersion of the lens galaxy based on Keck data, and a characterization of the mass distribution along the line of sight... (read more)

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  • COSMOLOGY AND NONGALACTIC ASTROPHYSICS