Multi-Messenger Aspects of Characteristic Evolution

Explore a 46-minute lecture on multi-messenger aspects of characteristic evolution presented by Jeffrey Winicour from the University of Pittsburgh at IPAM's Workshop I: Computational Challenges in Multi-Messenger Astrophysics. Delve into a comprehensive review of characteristic evolution in coupled gravitational fields, focusing on Einstein-Klein-Gordon and Einstein-Maxwell systems. Examine the advantages of characteristic evolution for extracting radiation fields at infinity and other physical properties like energy-momentum and angular momentum. Compare the use of Bondi-Sachs coordinates versus affine-null coordinates in computing late-time radiation features, including gravitational and electromagnetic memory effects. Gain valuable insights into advanced concepts in astrophysics and computational methods for studying multi-messenger phenomena.