What can we learn from the r-element distribution of CS 22892-052?

Details What can we learn from the r-element distribution of CS 22892-052? What can we learn from the r-element distribution of CS 22892-052?

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...322l..29g&link_type=abstract

Astronomy and Astrophysics, v.322, p.L29-L32

Astronomy and Astrophysics

Astrophysics

21

Nucleosynthesis, Nuclear Reactions, Stars: Abundances, Solar System: General, Stars: Cs 22892-052

Scientific paper

The striking similarity between the solar distribution of r-element abundances in the 56<=Z<=76 range and the corresponding abundance pattern observed in the ultra-metal-poor star CS 22892-052 is analysed. It is found that such an observation does not necessarily imply that the whole A>70 distribution of r-nuclides, including Th, suspected to have been engulfed in CS 22892-052 at the same time as the detected elements is solar. Such a conclusion derives from the finding that an arbitrary superposition of r-process events that does not fit the whole solar r-process pattern can also account for the CS 22892-052 observations. The interpretation of this result and its implications are discussed.

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