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Séminaire Univers /
Seminar Universe

« Measuring the Hubble constant with strong gravitational lensing time delays - the latest update from TDCOSMO »

Simon Birrer
Kavli Inst. Particle Astrophysics Cosmology (KIPC), Univ. Stanford (Standford, California, Etats-Unis d'Amérique)

Strong gravitational lensing time delays can provide a precise measurement of the Hubble constant, both fully independent of the local distance ladder and the CMB. I highlight the technique and the assumptions that go into this measurement and present the recent update of the TDCOSMO collaboration and put those in context with previous measurements. I will then look in the near future and highlight the prospects of this technique with increasing sample size, analysis techniques and advances in instrumentation.

mardi 22 septembre 2020 - 17:00
Institut d'Astrophysique de Paris
Pages web du séminaire / Seminar's webpage