Light element and NI abundance in field disk and halo stars

Details Light element and NI abundance in field disk and halo stars Light element and NI abundance in field disk and halo stars

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...178..179g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 178, no. 1-2, May 1987, p. 179-193. CNR-supported research.

Astronomy and Astrophysics

Astrophysics

147

Abundance, Galactic Evolution, Light Elements, Milky Way Galaxy, Nickel, Stellar Composition, Aluminum, Calcium, Dwarf Stars, Giant Stars, Magnesium, Nuclear Fusion, Silicon, Sodium, Titanium

Scientific paper

The results of a new, extensive abundance survey of the elements Na, Mg, Al, Si, and K in halo and disk dwarfs and giants is reported. Abundances for metal-poor field giants agree with those derived for field dwarfs. Observed alpha elements are overabundant with respect to iron in halo stars by 0.4 + or - 0.1 dex for Si, 0.3 + or - 0.1 dex for Mg, 0.2 + or - 0.1 dex for Ca, and 0.2 + or - 0.1 dex for Ti. Na and Al are underabundant in halo stars with respect to alpha elements by about 0.5 + or - 0.1 and 0.3 + or - 0.1 dex, respectively. Na and Al abundances are correlated; Ni is slightly underabundant in halo stars.

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