Multimessenger Astrophysics and the Emerging Picture of High-Energy Neutrino Sources

Ali Kheirandish reviews how high-energy neutrinos are reshaping multimessenger astronomy and searches for new particle physics. IceCube established the astrophysical neutrino signal in 2013; a decade of observations has since revealed directional structure, with emission identified from nearby active galaxies and a smaller contribution from the Milky Way. The seminar examines these measurements, the emerging account of where cosmic neutrinos originate, and opportunities to test physics beyond the Standard Model through the neutrino sector.