Effects of the s-process on Fe-group elements in meteorites
Abstract
In the present paper we investigate the possible connection between s-process nucleosynthesis occurring during the asymptotic giant branch (AGB) phase of low-mass stars (LMS) and the isotopic anomalies of the "Fe-group" elements observed in several macroscopic samples of meteorites or in grains formed as circumstellar condensates (hereafter CIRCONs). The available measurements of chromium, iron, and nickel are well reproduced by stellar models, which account for the largest shifts in the heaviest isotopes of each element: in particular ^(54)Cr, ^(58)Fe, and ^(64)Ni. Moreover, many circumstellar condensates reflect ^(50)Ti excesses and some production of ^(46, 47, 49)Ti, as predicted by slow-neutron captures in AGB stars. Nevertheless, some difficulties are found in comparing theoretical calculations of s-process nucleosynthesis with calcium, silicon, and zinc isotopic anomalies.
Additional Information
© 2017 Published under licence by IOP Publishing Ltd. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. This research was supported by the Department of Physics and Geology of the University of Perugia (through the grant named "From Rocks to Stars") and the INFN, Section of Perugia through the funds of its Group III.Attached Files
Published - Trippella_2016_J._Phys.__Conf._Ser._703_012027.pdf
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Additional details
- Eprint ID
- 73254
- Resolver ID
- CaltechAUTHORS:20170105-083356029
- University of Perugia
- Istituto Nazionale di Fisica Nucleare (INFN)
- Created
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2017-01-05Created from EPrint's datestamp field
- Updated
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2021-11-11Created from EPrint's last_modified field