Tuning the Clock: Uranium and Thorium Chronometers Applied to CS 31082-001
Astrophysics
2008-11-26 v1
Abstract
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.
Cite
@article{arxiv.astro-ph/0104335,
title = {Tuning the Clock: Uranium and Thorium Chronometers Applied to CS 31082-001},
author = {R. Toenjes and H. Schatz and K. -L. Kratz and B. Pfeiffer and T. C. Beers and J. Cowan and V. Hill},
journal= {arXiv preprint arXiv:astro-ph/0104335},
year = {2008}
}
Comments
5 pages incl. 1 figure, a shorter 3 page version will be published in the proceedings of the "Astrophysical Ages and Timescales" conference held in Hilo, Hawaii, Feb 5-9, 2001