Galactic Archaeology with WFMOS and chemodynamical simulations

Chiaki Kobayashi (ANU)

Elemental abundances are fossils to tell the star formation and galaxy  
formation histories in the Universe. We will predict the time  
evolution of kinematics and elemental abundance of stars with our  
chemodynamical simulations that includes the relevant baryon physics  
such as star formation, supernova, and nucleosynthesis.
In order to untangle the formation and evolutionary history of  
galaxies from the observations, the following elements are necessary;  
(1) Zinc is produced only by hypernovae, which are connected with  
gamma-ray bursts. (2) Manganese is more produced by Type Ia  
Supernovae, and the metallicity effect is important for the supernova  
cosmology. (3) Oxygen and Magnesium are mainly produced by core- collapse
supernovae, and (4) Iron is produced by Type Ia Supernovae and hypernovae.
High-resolution multi-object spectrograph WFMOS will provide a  
homogeneous data set, and we predict the frequency distribution of the  
elemental abundance rations in the Milky Way Galaxy.