Measuring H0 with strongly lensed quasars

27.01.2023 11:50 – 12:50

Time-delay cosmography with lensed quasars is the only single-step method to measure H0. It can strengthen or alleviate the current "Hubble tension". The method has its own advantages and drawbacks that I will review, before presenting the different avenues adopted by the TDCOSMO collaboration to improve results. This includes 1- spatially resolved kinematics of lens galaxies, 2- Hierarchical Bayesian analysis of joint samples of time delay and non-time delay lenses and 3- massive time delay measurements obtained at high temporal cadence, illustrating the need for medium-size telescope(s) to complement LSST.


Bâtiment: Ecole de Physique

Room 234

Organisé par

Département de physique théorique


Frédéric Courbin, EPFL

entrée libre


Catégorie: Séminaire

Mots clés: Cosmology

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