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Studying Galactic Chemical Properties by using Cosmological Numerical Simulations

Published online by Cambridge University Press:  05 March 2013

Patricia B. Tissera  and
Cecilia Scannapieco
Patricia B. Tissera*
Affiliation:
Institute for Astronomy and Space Physics, CONICET, Argentina
Cecilia Scannapieco
Affiliation:
Institute for Astronomy and Space Physics, CONICET, Argentina
*
2E-mail: patricia@iafe.uba.ar
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Abstract

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We developed a chemical code within gadget2 which allows the description of the enrichment of the Universe as a function of redshift, taking into account detailed metal production by supernovae Ia and II, and metal-dependent cooling. This is the first numerical code that includes both chemical production and metal-dependent cooling in a cosmological context. By analysing the cosmic star formation rate, we found that the effects of considering a metal-dependent cooling are important, principally, for z ≤ 3. In simulations where primordial cooling functions are used, the comoving star formation rate could be up to 20%; lower than those obtained in runs with metal-dependent cooling functions. Within galaxy-like objects, the presence of chemical elements changes the star-formation rates and, consequently, the chemical production and patterns of stars. However, owing to non-linear evolution of the structure, the effects depend on the evolutionary history path of each galaxy-like object.

Keywords

Galaxy: dynamical and chemical evolutionmethods: 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. 192 - 196
Copyright
Copyright © Astronomical Society of Australia 2004

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