University of Hertfordshire

By the same authors

Chemodynamical Simulations with Variable IMF

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


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Original languageEnglish
Title of host publicationHunting for the Dark
Subtitle of host publicationthe Hidden Side of Galaxy Formation
EditorsV P Debattista, C C Popescu
Place of PublicationMELVILLE
PublisherAmerican Institute of Physics
Number of pages4
ISBN (Print)978-0-7354-0786-2
Publication statusPublished - 2010
EventInternational Conference on Hunting for the Dark: The Hidden Side of Galaxy Formation - Qawra
Duration: 19 Oct 200923 Oct 2009

Publication series

NameAIP Conf Procs
PublisherAmerican Institute of Physics


ConferenceInternational Conference on Hunting for the Dark: The Hidden Side of Galaxy Formation


Using self-consistent chemodynamical simulations including star formation, supernova feedback, and chemical enrichment, I show the dependence of the initial mass function (IMF) on cosmic star formation and chemical enrichment histories. The effects of Pop-III IMF can be only seen in the elemental abundance ratios at z greater than or similar to 4 or [Fe/H] less than or similar to - 2. The preferable IMF has a flatter slope in the case of high star formation rate (SFR) and smaller upper-mass (similar to 20M(circle dot)) in the case of low SFR, which is consistent with the observed elemental abundances of dwarf spheroidal galaxies. However, the [alpha/Fe] problem of elliptical galaxies may require other solutions.

ID: 494084