Thorium in G-dwarf stars as a chronometer for the Galaxy

Details Thorium in G-dwarf stars as a chronometer for the Galaxy Thorium in G-dwarf stars as a chronometer for the Galaxy

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.328..127b&link_type=abstract

Nature (ISSN 0028-0836), vol. 328, July 9, 1987, p. 127-131.

Computer Science

104

Dwarf Stars, G Stars, Metallicity, Milky Way Galaxy, Radioactive Isotopes, Stellar Composition, Thorium Isotopes, Abundance, Galactic Evolution, Stellar Evolution, Stellar Spectra

Scientific paper

Observation of the radioactive nuclide 232Th (half life 14 Gyr) in stars of various ages offers the possibility of directly relating the timescale for nucleosynthesis to that for stellar and galactic evolution. An initial set of such observations reveals no detectable evolution of the thorium abundance with respect to a stable element. This result is seen as evidence for a short timescale for galactic evolution and also for a problem with the stellar age scale.

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