TY - JOUR
T1 - Chemodynamical simulations of the MILKY WAY galaxy
AU - Kobayashi, Chiaki
AU - Nakasato, Naohito
PY - 2011/3/1
Y1 - 2011/3/1
N2 - 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.
AB - 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.
KW - Galaxy: abundances
KW - Galaxy: evolution
KW - Galaxy: formation
KW - methods: numerical
KW - supernovae: general
UR - http://www.scopus.com/inward/record.url?scp=79952137161&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/729/1/16
DO - 10.1088/0004-637X/729/1/16
M3 - Article
SN - 0004-637X
VL - 729
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 16
ER -