Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pazh....4..500m&link_type=abstract
(Pis'ma v Astronomicheskii Zhurnal, vol. 4, Nov. 1978, p. 500-504.) Soviet Astronomy Letters, vol. 4, Nov.-Dec. 1978, p. 269-272
Astronomy and Astrophysics
Astronomy
Cosmology, Galactic Evolution, Metallic Stars, Milky Way Galaxy, Star Distribution, Abundance, Disks, Halos, Iron, Stellar Evolution
Scientific paper
The distribution of disk-population stars with respect to metallicity (Fe/H) exhibits a dip separating the population into two groups. A sum of two normal curves, centered at (Fe/H) = -0.22 and +0.08, adequately fits the distribution. The curves may be interpreted as random-error distributions for the metallicity of the sample stars. All stars within each group therefore have practically the same metal abundance. The origin of the galactic subsystems is discussed. The division of the Galaxy into halo, disk, and flat population I subsystems evidently resulted from a suppression of star formation during periods when the collapsing Galaxy was being enriched with heavy elements.
Marsakov V. A.
Suchkov Anatoly A.
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