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Letter to the Editor
What can we learn from the r-element distribution of CS 22892-052?
S. Goriely and
Received 20 February 1997 / Accepted 1 April 1997
The striking similarity between the solar distribution of r-element abundances in the 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 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.
Key words: nucleosynthesis nuclear reactions stars: abundances solar system: general stars: CS 22892-052
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© European Southern Observatory (ESO) 1997
Online publication: June 5, 1998