4 research outputs found
Elemental compositions of comet 81P/Wild 2 samples collected by Stardust
We measured the elemental compositions of material from 23 particles in aerogel and from residue in seven craters in aluminum foil that was collected during passage of the Stardust spacecraft through the coma of comet 81P/Wild 2. These particles are chemically heterogeneous at the largest size scale analyzed (similar to 180 ng). The mean elemental composition of this Wild 2 material is consistent with the CI meteorite composition, which is thought to represent the bulk composition of the solar system, for the elements Mg, Si, Mn, Fe, and Ni to 35%, and for Ca and Ti to 60%. The elements Cu, Zn, and Ga appear enriched in this Wild 2 material, which suggests that the CI meteorites may not represent the solar system composition for these moderately volatile minor elements
Evidence from stable isotopes and 10Be for solar system formation triggered by a low-mass supernova
Origin of the chemical elements
This review provides the necessary background from astrophysics,
nuclear, and particle physics to understand the cosmic origin of
the chemical elements. It reflects the year 2009 state of the
art in this extremely quickly developing interdisciplinary
research direction. The discussion summarizes the
nucleosynthetic processes in the course of the evolution of the
Universe and the galaxies contained within, including primordial
nucleosynthesis, stellar evolution, and explosive
nucleosynthesis in single and binary systems