Café-Club, Mohammad Taher SAFARZADEH: “How to use LISA to constrain Hubble expansion rate at high redshifts”.

Mohammad Taher SAFARZADEH (NASA Goddard Space Flight Center): “How to use LISA to constrain Hubble expansion rate at high redshifts”.

You can find the schedule of upcoming café-clubs and the video of old ones here.

Take care,
Carlo, Meriam, Mathilde

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ABSTRACT

Our understanding of the formation channels of stellar mass compact objects have been challenged by the discovery of massive binary black holes in the third observing run of LIGO/Virgo Collaboration. It is imaginable that our theories of supermassive black hole formation should be revisited by the launch of LISA that targets gravitational wave observations of supermassive black holes at high redshifts. I will talk about how we can leverage LISA observations to constrain models of supermassive black hole formation together with the expansion rate of the universe at high redshift. The proposed approach is simple and yet powerful and will help us to also gain a better understanding of seed formation in the early universe.