Chemodynamical simulations of the MILKY WAY galaxy

Chiaki Kobayashi*, Naohito Nakasato

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    181 Citations (Scopus)

    Abstract

    We present chemodynamical simulations of a Milky-Way-type galaxy using a self-consistent hydrodynamical code that includes supernova feedback and chemical enrichment, and predict the spatial distribution of elements from oxygen to zinc. In the simulated galaxy, the kinematical and chemical properties of the bulge, disk, and halo are consistent with the observations. The bulge formed from the assembly of subgalaxies at z ≳ 3, and has higher [α/Fe] ratios because of the small contribution from Type Ia supernovae. The disk formed with a constant star formation over 13Gyr, and shows a decreasing trend of [α/Fe] and increasing trends of [(Na,Al,Cu,Mn)/Fe] against [Fe/H]. However, the thick disk stars tend to have higher [α/Fe] and lower [Mn/Fe] than thin disk stars. We also predict the frequency distribution of elemental abundance ratios as functions of time and location, which can be directly compared with galactic archeology projects such as HERMES.

    Original languageEnglish
    Article number16
    JournalAstrophysical Journal
    Volume729
    Issue number1
    DOIs
    Publication statusPublished - 1 Mar 2011

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