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Presolar SiC Grains of Type AB with Isotopically Light Nitrogen: Contributions from Supernovae?

  • P. HoppeEmail author
  • Marco Pignatari
  • S. Amari
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 219)

Abstract

Primitive solar system materials contain presolar grains that formed in the winds of evolved stars and in the ejecta of stellar explosions. Here, we report on NanoSIMS measurements of C-, N-, Al–Mg-, Si-, and S-isotopic compositions of 10 submicrometer-sized presolar SiC grains of Type AB from the Murchison meteorite. Except for one grain with the highest 12C/13C ratio we find good correlations between 12C/13C, 14N/15N, and 26Al/27Al. The correlations are well explained by a 25 M supernova (SN) model that considers H ingestion into the He shell. The comparison of our data with the SN model suggests that SNe might have contributed not only AB grains with heavy N, as suggested previously, but also some with light N.

Keywords

Presolar grains Silicon carbide Supernovae 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Max Planck Institute for ChemistryMainzGermany
  2. 2.E. A. Milne Centre for AstrophysicsUniversity of HullHullUK
  3. 3.McDonnell Center for the Space Sciences and Physics DepartmentWashington UniversitySt. LouisUSA
  4. 4.NuGrid CollaborationEast LansingUSA
  5. 5.JINA-CEEEast LansingUSA
  6. 6.Konkoly ObservatoryBudapestHungary

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