Speaker
Prof.
Leon Koopmans
(Kapteyn Astronomical Institute)
Description
Time-delay cosmography with lensed quasars is the only single-step method to measure H0. It has its own advantages and drawbacks that I will review, before presenting the different avenues adopted by the TDCOSMO collaboration to improve results. Part of this effort resides in time delay measurements obtained at high temporal cadence for 50 lensed quasars, illustrating the need for medium-size telescope(s) to complement LSST.
