Heidelberg Joint Astronomical Colloquium

Speaker Carole Mundell
Title The physics and energetics of gamma ray bursts - the early bird catches the worm
Abstract Gamma Ray Bursts (GRB) are the instantaneously most luminous objects in the Universe and represent the most significant astrophysical phenomenon since the discovery of pulsars and quasars. Originally discovered in the 1960's by US satellites monitoring violations of nuclear test ban treaties, these intense but brief flashes of high-energy gamma rays remained an enigma until the 1990's when new scientific satellites and ground-based followup observations at other wavelengths revolutionised the study of GRBs and established their cosmological origin. In this talk, I will present the current state of play in this rapidly evolving research field, concentrating on physical insight gained from real-time observations across the electromagnetic spectrum that address fundamental issues such as the properties of magnetic fields in the relativistic fireball, long-lived central engines and the prospects for using GRBs as probes of the high redshift Universe.