Star formation and feedback in smoothed particle hydrodynamic simulations – I. Isolated galaxies

2006/02/28 by Greg Stinson, Anil Seth, Neal Katz +3 · 22 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy formation and evolution #Gamma-ray bursts and supernovae #Milky Way #Normalization (sociology) #Smoothed-particle hydrodynamics #Star formation #Supernova #astro-ph

paper · pdf · doi:10.1111/j.1365-2966.2006.11097.x

published as Mon.Not.Roy.Astron.Soc.373:1074-1090,2006 · 18 pages, 22 figures, accepted to MNRAS, full resolution figures, more data, and movies at http://hpcc.astro.washington.edu/starformation

arxiv created 2006/09/26 · openalex publication_date 2006/11/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We present an analysis of star formation and feedback recipes appropriate for galactic smoothed particle hydrodynamics simulations. Using an isolated Milky Way-like galaxy, we constrain these recipes based on well-established observational results. Our star formation recipe is based on that of Katz with the additional inclusion of physically motivated supernova feedback recipes. We propose a new feedback recipe in which Type II supernovae are modelled using an analytical treatment of blastwaves. With this feedback mechanism and a tuning of other star formation parameters, the star formation in our isolated Milky Way-like galaxy follows the slope and normalization of the observed Schmidt law. In addition, we reproduce the low-density cut-off and filamentary structure of star formation observed in disc galaxies. Our final recipe will enable better comparison of N-body simulations with observations.

Citations

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