Nicolas Dauphas

University of Chicago

Galactic chemical evolution and extinct/extant radiochronometers

If stellar yields are known, models of galactic chemical evolution can be used to predict what the abundances of extinct and extant radionuclides at the formation of the solar system were. These predictions can be compared with meteorite measurements to constrain some aspects of stellar nucleosynthesis and galactic chemical evolution. The questions that will be addressed are
(i) What is the radiometric age of the Galaxy?
(ii) Did X-ray binaries contribute a significant portion of p-process nuclides in the solar system?
(iii) Is there evidence in meteoritic abundances for multiple sites for the r-process?

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