Short-lived Extinct Radioactivities and the Birth of the Sun

Details Short-lived Extinct Radioactivities and the Birth of the Sun Short-lived Extinct Radioactivities and the Birth of the Sun

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..ses.da003m&link_type=abstract

American Physical Society, The 69th Annual Meeting of the Southeastern , abstract #DA.003

Astronomy and Astrophysics

Astrophysics

Scientific paper

Extinct radioactivities are isotopes that were extant at the time of formation of the solar system but that have since decayed. Their abundances may be inferred from isotopic anomalies in the daughter isotopes, and these data provide valuable constraints on the circumstance of the birth of our Sun. Remarkably, among ten or so isotopes we are convinced were alive in the early solar nebula, only two or three agree with expectations from Galactic nucleosynthesis. The r-process isotopes tend to be lower in the meteorites than a naive Galactic nucleosynthesis would imply, and the short-lived species seem to have had extra production from either a nearby star or from energetic particles from the early Sun. This talk will review the data available and then will attempt to reconcile the abundances of the short-lived radioactivities with appropriate models for Galactic chemical evolution and the astrophysical setting of the Sun's birth.

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