Computer Science
Scientific paper
Aug 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1269...42k&link_type=abstract
THE 10TH INTERNATIONAL SYMPOSIUM ON ORIGIN OF MATTER AND EVOLUTION OF GALAXIES: OMEG-2010. AIP Conference Proceedings, Volume 1
Computer Science
Galaxies, Star Formation, Interstellar Matter, Supernovae, Element Relative Abundance, Galactic Center, Bar, Circumnuclear Matter, And Bulge, Star Formation, Atomic, Molecular, Chemical, And Grain Processes, Supernovae, Abundances, Chemical Composition
Scientific paper
We predict the frequency distribution of elemental abundance ratios from Carbon to Zinc as a functions of time location, which can be directly compared with the next generation of the galactic archeology project such as the HERMES. We perform the chemodynamical simulations of a Milky Way-type galaxy from a CDM initial condition, using a self-consistent hydrodynamical code with supernova feedback chemical enrichment. In the simulated galaxy, the kinematical and chemical properties of the bulge, disk, halo are consistent with the observations. The bulge have formed from the assembly of subgalaxies at z>~2, and have higher [α/Fe] ratios because of the lack of contribution of Type Ia Supernovae. The disk have formed with a constant star formation over 13 Gyr shows a decreasing trend of [α/Fe] and increasing trends of [(Na, Al, Cu, Mn)/Fe]. However, the thick disk stars tend to have higher [α/Fe] lower [Mn/Fe] than thin disk stars. 60% of the thick disk stars have formed in the satellite galaxies before they accrete on the disk in this CDM-based simulation.
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