Tuning the Clock: Uranium and Thorium Chronometers Applied to CS 31082-001

Details Tuning the Clock: Uranium and Thorium Chronometers Applied to CS 31082-001 Tuning the Clock: Uranium and Thorium Chronometers Applied to CS 31082-001

2001-04-20

arxiv.org/abs/astro-ph/0104335v1

Astrophys.J.579:626-638,2002

Astronomy and Astrophysics

Astrophysics

5 pages incl. 1 figure, a shorter 3 page version will be published in the proceedings of the "Astrophysical Ages and Timescale

Scientific paper

10.1086/342939

We obtain age estimates for the progenitor(s) of the extremely metal-poor ([Fe/H = -2.9) halo star CS 31082-001, based on the recently reported first observation of a Uranium abundance in this (or any other) star. Age estimates are derived by application of the classical r-process model with updated nuclear physics inputs. The [U/Th] ratio yields an age of 13+-4 Gyr or 8+-4 Gyr, based on the use of the ETFSI-Q or the new HFBCS-1 nuclear mass models, respectively. Implications for Thorium chronometers are discussed.

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