A commonly held view is that presolar grains could not survive the high temperatures of the protoplanetary disk close to the Sun, where calcium–aluminium-rich inclusions (CAI) formed. Yet a detailed noble gas isotopic composition analysis of a CAI shows evidence of presolar SiC incorporated in it that could withstand high-temperature processing.
- O. Pravdivtseva
- F. L. H. Tissot
- S. Amari
