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Supernova Propagation And Cloud Enrichment: A new model for the origin of $^{60}$Fe in the early solar system
- Source :
- ApJL (2008) 694 L1-L5
- Publication Year :
- 2009
-
Abstract
- The radioactive isotope $^{60}$Fe ($T_{1/2} = 1.5 $ Myr) was present in the early solar system. It is unlikely that it was injected directly into the nascent solar system by a single, nearby supernova. It is proposed instead that it was inherited during the molecular cloud stage from several supernovae belonging to previous episodes of star formation. The expected abundance of $^{60}$Fe in star forming regions is estimated taking into account the stochasticity of the star-forming process, and it is showed that many molecular clouds are expected to contain $^{60}$Fe (and possibly $^{26}$Al [$T_{1/2} = 0.74 $ Myr]) at a level compatible with that of the nascent solar system. Therefore, no special explanation is needed to account for our solar system's formation.<br />Comment: 15 pages, 3 figures
- Subjects :
- Astrophysics - Earth and Planetary Astrophysics
Subjects
Details
- Database :
- arXiv
- Journal :
- ApJL (2008) 694 L1-L5
- Publication Type :
- Report
- Accession number :
- edsarx.0904.1661
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/0004-637X/694/1/L1