Dust from 'Recent' Supernovae, Just Around the Corner

摘要

The successful searches for radioactive material expelled by one or several close supernovae and deposited on Earth and Moon are reviewed. A surplus of ~(60)Fe has been found at eight locations in terrestrial oceans as well as in Lunar samples. This surplus is attributed to supernova activity within 300 light years from the sun about 1.5 to 3.0 Ma ago. The mechanism of core-collapse SNe is described as well as the extremely sensitive detection method of accelerator mass spectrometry (AMS).