Lecture:- Radioactive Iron Rain: Evidence of a Nearby Supernova Explosion
A very close supernova explosion could have caused a mass extinction of life in Earth. In 1996, Brian Fields, the late Dave Schramm and the speaker proposed looking for unstable isotopes such as Iron-60 that could have been deposited by a recent nearby supernova explosion. A group from the Technical University of Munich has discovered Iron-60 in deep-ocean sediments and ferromanganese crusts due to one or more supernovae that exploded O(100) parsecs away about 2.5 million years ago. These results have recently been confirmed by a group from the Australian National University, and the Munich group has also discovered supernova Iron-60 in lunar rock samples. This talk will discuss the interpretation of these results in terms of supernova models, and the possible implications for life on Earth.
時間：2016.06.08(三) 16:00 ~ 17:30
地點：香港科技大學 李兆基校園 盧家驄薈萃樓 賽馬會高等研究院 4042室
講者：Prof. John Ellis (Clerk Maxwell Professor of Theoretical Physics, King's College London; Physicist, European Organization for Nuclear Research．CERN; Visiting Professor of HKUST Jockey Club IAS)