Ms. Swetha Bhagawat

As the next-generation gravitational wave detectors are getting ready to be launched in a decade's time, studies are being done on the science goals that can be achieved by these detectors -- both to guide the development of the mission as well as the pipelines to analyse their data. Spectroscopy of gravitational wave ringdowns from binary black hole systems are excellent probes to test our understanding of gravity in the strong-field regime. It is one of the core mission objectives of the future Laser Interferometric Space Antenna (LISA) mission. In this talk, I will summarize the prospects and precision of black hole spectroscopy with massive binary black hole ringdowns with the LISA mission. Further, we also fold in the expectations from the astrophysical population models of supermassive binaries to give realistic estimates. Lastly, we extend this study to one of the future ground-based gravitational wave detector, the Einstein telescope (ET).