University of Hertfordshire

By the same authors

Chemodynamical simulations of the Milky Way Galaxy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Original languageEnglish
Title of host publicationGalaxy Disk in Cosmological Context
EditorsJ. Andersen, J. Bland-Hawthorn, B. Nordstrom
PublisherCambridge University Press
Pages375-380
Number of pages6
ISBN (Print)978-0-521-88985-8
DOIs
Publication statusPublished - 2009
Event254th Symposium of the International-Astronomical-Union - Copenhagen
Duration: 9 Jun 200813 Jun 2008

Publication series

NameIAU Symposia
PublisherInternational Astronomical Union
Volume254

Conference

Conference254th Symposium of the International-Astronomical-Union
CityCopenhagen
Period9/06/0813/06/08

Abstract

We simulate the chemodynamical evolution of the Milky Way Galaxy, including the nucleosynthesis yields of hypernovae and a new progenitor model for Type la Supernovae (SNe la). In our nucleosynthesis yields of core-collapse supernovae, we use light curve and spectral fitting to individual supernovae to estimate the mass of the progenitor, the explosion energy and the iron mass produced. A large contribution of hypernovae is required from the observed abundance of Zn [Zn/Fe] similar to 0). In our progenitor model of SNe la, based on the single degenerate scenario, the SN Ia lifetime distribution spans a range of 0.1 - 20 Gyr with peaks at both - 0.1 and I Gyr. A metallicity effect from white dwarf winds is required from the observed trends of elemental abundance ratios (i.e., [(alpha,Mn,Zn)/Fe]-[Fe/H] relations). In our simulated Milky Way-type galaxy, the kinematical and chemical properties of the bulge, disk, and halo are broadly consistent with observations. 80% of the thick disk stars are older than similar to 8 Gyr and tend to have larger [alpha/Fe] than in the thin disk.

ID: 494163