2001/04/23 by M. Arnould, S. Goriely, Arnould, M. +1
Physics and Astronomy · #Solar and Space Plasma Dynamics #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0104359
9 pages, no figures; ASP Conference Series: "Astrophysical Ages and Time Scales"
arxiv created 2001/04/23 · arxiv updated 2009/12/01
Critical views are presented on some nucleo-cosmochronological questions. Progress has been made recently in the development of the 187Re-187Os cosmochronometry. From this, there is good hope for this clock to become of the highest quality for the nuclear dating of the Universe. The simultaneous observation of Th and U in ultra-metal-poor stars would also be a most interesting prospect. In contrast, a serious inquietude is expressed about the reliability of the chronometric attempts based on the classical 232Th-238U and 235U-238U pairs, as well as on the Th (without U) abundance determinations in ultra-metal poor stars.