Technique to determine timescales for astrophysical objects and events
Nucleocosmochronology or nuclear cosmochronology is a technique used to determine timescales for astrophysical objects and events.
To calculate the age of formation of astronomical objects, the observed ratios of abundances of heavy radioactive and stable nuclides are compared to the primordial ratios predicted by nucleosynthesis theory.[1]
Nucleocosmochronology has been employed to determine the age of the Sun (4.57±0.02 billion years) and of the Galactic thin disk (8.8±1.8 billion years),[2][3][4] among others. It has also been used to estimate the age of the Milky Way itself by studying Cayrel's Star in the Galactic halo, which due to its low metallicity, is believed to have formed early in the history of the Galaxy.[5]
Limiting factors in its precision are the quality of observations of faint stars and the uncertainty of the primordial abundances of r-process elements.
^Bland-Hawthorn, Joss; Freeman, Kenneth (2014). "Near Field Cosmology: The Origin of the Galaxy and the Local Group". The Origin of the Galaxy and Local Group. Saas-Fee Advanced Course. Vol. 37. Berlin, Heidelberg: Springer Berlin Heidelberg. pp. 1–144. Bibcode:2014SAAS...37....1B. doi:10.1007/978-3-642-41720-7_1. ISBN 978-3-642-41719-1. ISSN 1861-7980.
^del Peloso et al., "The age of the Galactic thin disk from Th/Eu nucleocosmochronology I. Determination of Th/Eu abundance ratios." Astronomy & Astrophysics, 434, (2005) 275.
^del Peloso et al., "The age of the Galactic thin disk from Th/Eu nucleocosmochronology II. Chronological analysis." Astronomy & Astrophysics, 434, (2005) 301.
^del Peloso et al., "The age of the Galactic thin disk from Th/Eu nucleocosmochronology III. Extended sample." Astronomy & Astrophysics, 440, (2005) 1153.
Nucleocosmochronology or nuclear cosmochronology is a technique used to determine timescales for astrophysical objects and events. To calculate the age...
results to estimates of their original abundance, a technique called nucleocosmochronology. These yield values of about 12.5 ± 3 billion years for CS 31082-001...
estimated using computer models of stellar evolution and through nucleocosmochronology. The result is consistent with the radiometric date of the oldest...
younger than the thick disk. Based upon the emerging science of nucleocosmochronology, the Galactic thin disk of the Milky Way is estimated to have been...
produced the elemental abundance of the early Universe. (See also nucleocosmochronology.) When the first neutral atoms formed from a sea of primordial ions...
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from the Big Bang 13.8 billion years ago. The recent science of nucleocosmochronology is extending the approaches used for carbon-14 and other radiometric...
billions of years into the future. Based upon the emerging science of nucleocosmochronology, the Galactic thin disk of the Milky Way is estimated to have been...
of interstellar and circumstellar molecules Molecules in stars Nucleocosmochronology Stellar chemistry McSween, Harry; Huss, Gary (2010). Cosmochemistry...
practical applications (those unrelated to such disciplines as nucleocosmochronology and geochronology). In other terms, 99.999999983% of the bismuth...
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sequence Hayashi track where they are nearly fully convective. Nucleocosmochronology Barnes, Sydney (March 2003). "On the rotational evolution of Solar-...