Abstract

Invited Talk - Plenary

Thursday, 14 September 2023, 11:00   (H 0104 / virtual plenum)

The supernova link between the Local Bubble and deep sea radioisotopes

Michael Schulreich
TU Berlin

Supernova explosions responsible for the creation of the Local Bubble, our Galactic habitat, should also have left traces in the solar system. Discoveries of increased interstellar influxes of 60Fe (a radioisotope which is almost exclusively produced via stellar nucleosynthesis) into deep-sea archives from all major oceans at 1.5–3.2 million years ago and 6.5–8.7 million years ago, and onto the Moon, appear very promising in this context. I will report on our latest efforts to link these, but also measurements of the interstellar radioisotopes 26Al, 53Mn, and 244Pu, to the formation of the Local Bubble, using 3D hydrodynamic adaptive mesh refinement simulations. These calculations are based on a sophisticated selection procedure for the Local Bubble progenitor stars and take advantage of passive tracers for modelling the turbulent chemical mixing process.