We run a three-dimensional Galactic chemical evolution (GCE) model to follow the propagation of Mn-53 from supernovae of type Ia (SNIa), Fe-60 from core-collapse supernovae (CCSNe), Hf-182 from intermediate mass stars (IMSs), and Pu-244 from neutron star mergers (NSMs) in the Galaxy. We compare the GCE of these short-lived radioactive isotopes (SLRs) to recent detections on the deep-sea floor. We find that although these SLRs originate from different sites, they often arrive conjointly on Earth.
@article{arxiv.2510.13070,
title = {Galactic chemical evolution with the short-lived isotopes Mn-53, Fe-60, Hf-182, and Pu-244},
author = {Benjamin Wehmeyer and Andrés Yagüe López and Benoit Côté and Maria K. Pető and Chiaki Kobayashi and Maria Lugaro},
journal= {arXiv preprint arXiv:2510.13070},
year = {2025}
}