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- W2052491570 abstract "We analyze the enrichment histories of chemical elements in the Galactic halo stars with use of large abundance data compiled in the Stellar Abundances for Galactic Archaeology (SAGA) database [4]. We find four different populations represented by stars divided at [Fe/H] ≃ −1.8, ≃ −2.2 and ≃ −3.3 across which mean enrichments of C, Mg, Si, Ca, Ni, Co and Zn decrease by ∼ 0.1 or ∼ 0.1-0.3 dex toward higher metallicity. The first one is common to both α-elements (C, Mg, Si and Ca) and iron-group elements (Ni and Zn). And the second one is seen for C, Co and Zn, but not for other α-elements and Ni, while the third one is only seen for Co and Zn. We also investigate the correlation of Zn enrichment with the spatial distribution of stars. The difference near [Fe/H] ≃ −1.8 is detected for stars with the vertical distance from the disk less than 500pc and unclear for stars greater than it. The offset near [Fe/H] ≃ −2.2 is detected for stars greater than 500pc, but does not exist for stars less than it." @default.
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- W2052491570 date "2012-01-01" @default.
- W2052491570 modified "2023-09-23" @default.
- W2052491570 title "Enrichment history of elements in the galactic stars based on the SAGA database" @default.
- W2052491570 doi "https://doi.org/10.1063/1.4754415" @default.
- W2052491570 hasPublicationYear "2012" @default.
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