Chemo-dynamical simulations of galaxies

Date

2010

Authors

Kobayashi, Chiaki

Journal Title

Journal ISSN

Volume Title

Publisher

American Institute of Physics (AIP)

Abstract

We predict the frequency distribution of elemental abundance ratios from Carbon to Zinc as a functions of time and 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 and chemical enrichment. In the simulated galaxy, the kinematical and chemical properties of the bulge, disk, and halo are consistent with the observations. The bulge have formed from the assembly of subgalaxies at ≳2, and have higher [alpha;/Fe] ratios because of the lack of contribution of Type Ia Supernovae. The disk have formed with a constant star formation over 13 Gyr, and shows a decreasing trend of [alpha/Fe] and increasing trends of [(Na,Al,Cu,Mn)/Fe]. However, the thick disk stars tend to have higher [alpha /Fe] and 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.

Description

Keywords

Keywords: Galaxy: Abundances; Galaxy: Evolution; Stars: Supernovae

Citation

Source

AIP Conference Proceedings Volume 1269: THE 10TH INTERNATIONAL SYMPOSIUM ON ORIGIN OF MATTER AND EVOLUTION OF GALAXIES: OMEG 2010

Type

Conference paper

Book Title

Entity type

Access Statement

License Rights

DOI

10.1063/1.3485190

Restricted until

2037-12-31