Jena 2013 – scientific programme
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EP: Fachverband Extraterrestrische Physik
EP 1: Astrophysik
EP 1.7: Talk
Monday, February 25, 2013, 15:45–16:00, HS 9
Investigating the link between an iron-60 anomaly in the deep ocean’s crust and the origin of the Local Bubble — •Michael Schulreich and Dieter Breitschwerdt — Zentrum für Astronomie und Astrophysik, TU Berlin, Berlin, Germany
Supernova explosions responsible for the creation of the Local Bubble (LB) and its associated HI cavity should have caused geological isotope anomalies via deposition of debris on Earth. The discovery of a highly significant increase of 60Fe (a radionuclide that is exclusively produced in explosive nucleosynthesis) in layers of a deep sea ferromanganese crust corresponding to a time of 2.2 Myr before present, appears very promising in this context. We report on our progress in relating these measurements to the formation of the LB by means of 3D hydrodynamical adaptive mesh refinement simulations of the turbulent interstellar medium in the solar neighborhood. Our calculations are based on a sophisticated selection procedure for the LB’s progenitor stars and take advantage of passive scalars for following the chemical mixing process.