
%0 Journal Article
%A Amari, Sachiko 
%T Presolar Graphite: Noble Gases and their Origins
%J Publications of the Astronomical Society of Australia
%D 2003/12/24
%V 20
%N 4
%P 378-381
%K meteorites &#8212; presolar grains &#8212; Ne-E(L) &#8212; isotopic anomalies &#8212; nucleosynthesis
%R https://doi.org/10.1071/AS03044
%U https://www.publish.csiro.au/paper/AS03044 
%X Presolar graphite contains a 22Ne-rich component called Ne-E(L). Noble gas studies on graphite aggregates and single grains have shown that although a dominant source of the 22Ne is 22Na, 22Ne in the He-shell of asymptotic giant branch stars have also contributed to the Ne-E(L). In addition to novae that have been considered to be a possible source of 22Na, supernovae are a likely source as well. Krypton isotopic ratios of the separates indicate that part of graphite formed in low-mass (&#8804;3 M&odot;) asymptotic giant branch stars of low metallicity (Z &#8804; 0.006). 
