Relative abundances in metal-poor stars. I - The aluminum-to-iron ratio

Details Relative abundances in metal-poor stars. I - The aluminum-to-iron ratio Relative abundances in metal-poor stars. I - The aluminum-to-iron ratio

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...222..595p&link_type=abstract

Astrophysical Journal, Part 1, vol. 222, June 1, 1978, p. 595-599.

Astronomy and Astrophysics

Astrophysics

22

Abundance, Dwarf Stars, Giant Stars, Nuclear Fusion, Stellar Spectra, Aluminum, Carbon, Hydrogen, Iron, Stellar Spectrophotometry, Stellar Structure

Scientific paper

Motivated by specific predictions of explosive nucleosynthesis that indicate increasing over-deficiencies of aluminum at low overall metal abundances and armed with new high-quality, high-resolution echelle-Kron spectra, we have determined the aluminum-to-iron ratio in nearly a dozen high-velocity metal-poor dwarfs and subgiants with metal abundances 1/4 to 1/100 solar. We find that the relative abundance of aluminum does decrease in going from the stars of moderate metal deficiency to the most extremely metal-poor ones, a result which strongly supports explosive nucleosynthesis as the mechanism for heavy-element production in these stars.

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