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Published June 20, 1998 | Published
Journal Article Open

A Test of the Supernova Trigger Hypothesis with ^(60)Fe and ^(26)Al

Abstract

It is shown that if the ^(26)Al inventory of the early solar system, taken as (^(26)Al/^(27)Al)_☉ = 5×10^(−5), is a result of injection of fresh debris from a Type II supernova (SNII), then ^(60)Fe/^(56)Fe would have to be between 3×10^(−7) and 1×10^(−5). This inferred correlation of ^(26)Al and ^(60)Fe is based on the observation that both nuclei are produced dominantly in the O/Ne zone and that for SNII ejecta ^(26)Al/^(60)Fe is between 0.6 and 23. A similar correlation applies to ^(41)Ca,^(36)Cl,^(16)O, and ^(18)O, which are also produced in the same zone or in nearby regions. The supernova trigger hypothesis may be tested by determination of ^(60)Ni excesses correlated with Fe in samples where ^(26)Al was demonstrated to be present. From available experimental data, it appears that the observed abundance of ^(60)Fe is too low to be compatible with a supernova trigger that injected the ^(26)Al into the protosolar nebula. The same is true for ^(53)Mn, a short-lived nucleus produced in the outer edge of the Ni core.

Additional Information

© 1998 American Astronomical Society. Received 1998 March 3; accepted 1998 April 24; published 1998 June 8. We thank Stan Woosley for useful discussions and R. Kavanagh and P. Vogel for help with the heat. R. G. and M. B. wish to thank Caltech and the Lunatic Asylum for hospitality during the development of this work. Research supported by NASA NAGW5-4076. Division Contribution 8509 (989).

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