The Link Between the Local Bubble and Radioisotopic Signatures on Earth

Abstract

Traces of 2-3 Myr old 60Fe were recently discovered in a manganese crust and in lunar samples. We have found that this signal is extended in time and is present in globally distributed deep-sea archives. A second 6.5-8.7 Myr old signature was revealed in a manganese crust. The existence of the Local Bubble hints to a recent nearby supernova-activity starting 13 Myr ago. With analytical and numerical models generating the Local Bubble, we explain the younger 60Fe-signature and thus link the evolution of the solar neighborhood to terrestrial anomalies.

4 pages, 3 figures, accepted for publication in JPS Conf. Proc

References in corpus (4)

• The search for the origin of the Local Bubble redivivus
• Time resolved 2 million year old supernova activity discovered in Earth's microfossil record
• Search for supernova-produced 60Fe in a marine sediment
• Astrophysical Shrapnel: Discriminating Among Near-Earth Stellar Explosion Sources of Live Radioactive Isotopes

Cited by in corpus (1)

• On the shape of the local bubble