Measurement of the current expansion rate of the Universe using standard sirens is in tension with their estimation from the cosmic microwave background. The recent accelerated expansion of the Universe is attributed to vacuum energy that is in tension with what's expected for the magnitude of vacuum energy in quantum field theory. Additionally, more than five decades after the first hints of dark matter we still don't understand their origin or nature. Gravitational wave observations have the unique potential to address these problems. I will discuss the prospect of resolving these tensions with standard sirens of black hole and neutron star binaries over the next decade and how it will soon be possible to make even more precise measurements of cosmological parameters.
Zoom link: https://icts-res-in.zoom.us/j/92005508396?pwd=eVFMVlM2cUdrNDB0bk9LRUlRVTYxZz09
Meeting ID: 920 0550 8396
Passcode: 281532