Evidence for a Late Supernova Injection of 60 Fe into the Protoplanetary Disk

Autor:	James N. Connelly, Martin Bizzarro, Kristine Thrane, David Ulfbeck, Bradley S. Meyer, Anne Trinquier
Rok vydání:	2007
Předmět:	Physics Solar System Supernova Planetesimal Stars Multidisciplinary Meteorite Chondrite Astronomy Astrophysics Formation and evolution of the Solar System Protoplanetary disk
Zdroj:	Science. 316:1178-1181
ISSN:	1095-9203 0036-8075
DOI:	10.1126/science.1141040
Popis:	High-precision 60 Fe- 60 Ni isotope data show that most meteorites originating from differentiated planetesimals that accreted within 1 million years of the solar system's formation have 60 Ni/ 58 Ni ratios that are ∼25 parts per million lower than samples from Earth, Mars, and chondrite parent bodies. This difference indicates that the oldest solar system planetesimals formed in the absence of 60 Fe. Evidence for live 60 Fe in younger objects suggests that 60 Fe was injected into the protoplanetary disk ∼1 million years after solar system formation, when 26 Al was already homogeneously distributed. Decoupling the first appearance of 26 Al and 60 Fe constrains the environment where the Sun's formation could have taken place, indicating that it occurred in a dense stellar cluster in association with numerous massive stars.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40572a97585d175f66753ba8d34cdb57 https://doi.org/10.1126/science.1141040 Zobrazit plný text záznamu Plný text ve formátu PDF