Potential nucleosynthetic sources of the titanium isotope variations in solar system materials

Williams, N. H.; Fehr, M. A.; Akram, W. M.; Parkinson, I. J. and Schönbächler, M. (2012). Potential nucleosynthetic sources of the titanium isotope variations in solar system materials. In: 75th Annual Meeting of the Meteoritical Society, 12-17 Aug 2012, Cairns, Australia, p. 5209.

URL: http://www.lpi.usra.edu/meetings/metsoc2012/pdf/52...

Abstract

Different neutron rich isotopes (50Ti, 54Cr, 62Ni and 96Zr) display well documented isotopic heterogeneities be-tween various meteorite groups and the Earth-Moon system. The origin of these variations is not well understood. It has been suggested that the observed Ti isotope pattern in bulk solar system materials was generated by thermal events during solar system formation. An alternative explanation is that these anomalies are due to distinct presolar carrier phases, which were heterogeneously distributed within the solar system. In order to evaluate the nucleosynthetic site(s) responsible for the observed Ti isotope signatures, a comprehensive sample suite of solar sys-tem materials were analyzed to complement previous studies. Nucleosynthetic models for (i) Ia supernovae, (ii) supernovae II and (iii) TP-AGB stars are evaluated to establish the nucleosynthetic source of isotopic correlations observed in Iron group elements and Zr.

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