SEMINAR 2022

Abstract

Gravitational wave sources can be used as “standard sirens” to probe the rate of expansion of the Universe. The Laser Interferometer Space Antenna, LISA, is expected to deliver unprecedented information on the gravitational wave sources emitting in the mHz frequency band. Extreme mass-ratio inspirals and massive black hole binaries are amongst the main LISA sources and their parameters will be measured with great precision, making them perfect dark and bright standard sirens, respectively.

In this talk, after a quick review of recent LVK cosmology results from LIGO-Virgo gravitational wave observations, I will focus on the problem of using LISA dark and bright sirens to constrain cosmological parameters, such as the Hubble constant, discussing how different detection rates and the duration of the LISA mission may impact the results. I will also comment on the potential of combining observations from different LISA sources to jointly map both the late and distant Universe at an unprecedented level.