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Initial Model Catalogue for Galaxy Evolution

Published online by Cambridge University Press:  05 March 2013

Naohito Nakasato
Naohito Nakasato*
Affiliation:
Department of Astronomy, University of Tokyo, Hongo 7-3-1, Bunkyo-ku Tokyo, 113-0033, Japan
*
2E-mail: nakasato@astron.s.u-tokyo.ac.jp
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Abstract

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We have computed full hydrochemodynamical evolution for 150 initial models of protogalaxies with our chemodynamical SPH code named GENSO. Various parameters for all models are identical except for a seed for a random number generator. In other words, all models have similar global properties but have the different merging history that leads to a different evolution in each model. Results of the series of computations have two main applications. Firstly, we have an initial model catalogue for subsequent modelling of galaxy evolution. Since the resulting evolution depends strongly on the initial phase of the particle distribution, it is crucial to find a suitable initial model when we model a specific real galaxy in the Universe, notably the Milky Way in our case. We will make a precise chemical and dynamical model of the Milky Way out of 150 models in our initial model catalogue. Secondly, we can obtain a large variety of global histories of physical values such as star formation, metallicity in the ISM and stellar components, and Type II and Ia supernova rates. For example, the resulting total star formation history shows the peak at a high redshift z ∼ 6 and the peak value is ∼280 M⊙ yr–1 Mpc–3. Also, the Type Ia rate obtained has a peak at z ∼ 3.5. All of our results and model catalogue are publicly available from our website for those who wish to model galaxy evolution.

Keywords

ISM: cloudsGalaxy: kinematics and dynamicsmethods: N-body simulations
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 21 , Issue 2: The Fifth Workshop on Galactic Chemodynamics , 2004 , pp. 171 - 174
Copyright
Copyright © Astronomical Society of Australia 2004

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