On the Galactic Age Problem - Determination of the Th/eu Ratio in Halo Stars

Details On the Galactic Age Problem - Determination of the Th/eu Ratio in Halo Stars On the Galactic Age Problem - Determination of the Th/eu Ratio in Halo Stars

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...274..821f&link_type=abstract

Astronomy and Astrophysics, Vol. 274, NO. 3/JUL(III), P. 821, 1993

Astronomy and Astrophysics

Astrophysics

48

Stars: Abundances, Stars: Population Ii, Nuclear Reactions, Nucleosynthesis, Abundances, Galaxy: Abundances, Galaxy: Evolution

Scientific paper

In this paper, we present new measurements of the thorium and europium
abundances in metal poor stars. We found the [Th/Fe] and [Eu/Fe] ratios
to be oversolar in halo stars down to the metallicity [Fe/H] ≃
-2.3. Below this metallicity, our data seem to indicate a decrease of
the [Th/Fe] ratio which has to be confirmed by new studies.

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