Quasar Emission Lines - Intuition, Mathematics and Hubble Constant Determination

Explore the physics of quasar emission lines and their application to cosmological measurements in this 59-minute seminar lecture. Begin with a historical overview of quasar discovery and development, then delve into the qualitative aspects of the FRADO (Failed Radiatively Accelerated Dusty Outflow) physical model for emission-line formation. Learn how this innovative model enables the use of continuum time delay measurements in quasars as a tool for determining the Hubble constant, providing an independent method for measuring the expansion rate of the universe. Examine the mathematical foundations supporting the FRADO model through recent quantitative research, gaining insight into both the theoretical framework and practical applications of quasar spectroscopy in modern cosmology.