Stardust in the Laboratory

Publications of the Astronomical Society of Australia

Ernst Zinner¹ 

关键词: nuclear reactions;    nucleosynthesis;    abundances;    stars: AGB and post-AGB;    stars: supernovae: general;    dust;    extinction;   

DOI  :  10.1071/AS07039

学科分类：天文学(综合)

来源: CSIRO

【 摘 要 】

Primitive meteorites and interplanetary dust particles contain small grains that originated in stellar outflows and supernova explosions. These μm- and sub-μm-sized presolar grains can be isolated and studied for their isotopic compositions in the laboratory. They are recognised as stardust by their isotopic compositions, which are completely different from those of the Solar System. They provide new information on stellar evolution, nucleosynthesis, mixing processes in asymptotic giant branch (AGB) stars and supernovae, and Galactic chemical evolution. Red giants, AGB stars, Type II supernovae and possibly novae have been identified as stellar sources of the grains. Of the eight nuclear processes proposed by Burbidge et al. (1957), signatures of all except the r-process can be found in presolar dust grains.

【 授权许可】

Unknown