@article{gutcke_simulating_2017,
	title = {Simulating a metallicity-dependent initial mass function: {Consequences} for feedback and chemical abundances},
	volume = {1710},
	shorttitle = {Simulating a metallicity-dependent initial mass function},
	url = {http://adsabs.harvard.edu/abs/2017arXiv171004222G},
	abstract = {Observational and theoretical arguments increasingly suggest that the 
initial mass function (IMF) of stars may depend systematically on
environment, yet most galaxy formation models to date assume a universal
IMF. Here we investigate simulations of the formation of Milky Way
analogues run with an empirically derived metallicity-dependent IMF and
the moving-mesh code AREPO in order to characterize the associated
uncertainties. In particular, we compare a constant Chabrier and a
varying metallicity-dependent IMF in cosmological,
magneto-hydrodynamical zoom-in simulations of Milky Way-sized halos. We
find that the non-linear effects due to IMF variations typically have a
limited impact on the morphology and the star formation histories of the
formed galaxies. Our results support the view that constraints on
stellar-to-halo mass ratios, feedback strength, metallicity evolution
and metallicity distributions are in part degenerate with the effects of
a non-universal, metallicity-dependent IMF. Interestingly, the empirical
relation we use between metallicity and the high mass slope of the IMF
does not aid in the quenching process. It actually produces up to a
factor of 2-3 more stellar mass if feedback is kept constant.
Additionally, the enrichment history and the z = 0 metallicity
distribution are significantly affected. In particular, the alpha
enhancement pattern shows a steeper dependence on iron abundance in the
metallicity-dependent model, in better agreement with observational
constraints.},
	journal = {ArXiv e-prints},
	author = {Gutcke, Thales A. and Springel, Volker},
	month = oct,
	year = {2017},
	keywords = {Astrophysics - Astrophysics of Galaxies},
	pages = {arXiv:1710.04222},
}

{"_id":"zELxGHXQ6py6xL3sd","bibbaseid":"gutcke-springel-simulatingametallicitydependentinitialmassfunctionconsequencesforfeedbackandchemicalabundances-2017","author_short":["Gutcke, T. A.","Springel, V."],"bibdata":{"bibtype":"article","type":"article","title":"Simulating a metallicity-dependent initial mass function: Consequences for feedback and chemical abundances","volume":"1710","shorttitle":"Simulating a metallicity-dependent initial mass function","url":"http://adsabs.harvard.edu/abs/2017arXiv171004222G","abstract":"Observational and theoretical arguments increasingly suggest that the initial mass function (IMF) of stars may depend systematically on environment, yet most galaxy formation models to date assume a universal IMF. Here we investigate simulations of the formation of Milky Way analogues run with an empirically derived metallicity-dependent IMF and the moving-mesh code AREPO in order to characterize the associated uncertainties. In particular, we compare a constant Chabrier and a varying metallicity-dependent IMF in cosmological, magneto-hydrodynamical zoom-in simulations of Milky Way-sized halos. We find that the non-linear effects due to IMF variations typically have a limited impact on the morphology and the star formation histories of the formed galaxies. Our results support the view that constraints on stellar-to-halo mass ratios, feedback strength, metallicity evolution and metallicity distributions are in part degenerate with the effects of a non-universal, metallicity-dependent IMF. Interestingly, the empirical relation we use between metallicity and the high mass slope of the IMF does not aid in the quenching process. It actually produces up to a factor of 2-3 more stellar mass if feedback is kept constant. Additionally, the enrichment history and the z = 0 metallicity distribution are significantly affected. In particular, the alpha enhancement pattern shows a steeper dependence on iron abundance in the metallicity-dependent model, in better agreement with observational constraints.","journal":"ArXiv e-prints","author":[{"propositions":[],"lastnames":["Gutcke"],"firstnames":["Thales","A."],"suffixes":[]},{"propositions":[],"lastnames":["Springel"],"firstnames":["Volker"],"suffixes":[]}],"month":"October","year":"2017","keywords":"Astrophysics - Astrophysics of Galaxies","pages":"arXiv:1710.04222","bibtex":"@article{gutcke_simulating_2017,\n\ttitle = {Simulating a metallicity-dependent initial mass function: {Consequences} for feedback and chemical abundances},\n\tvolume = {1710},\n\tshorttitle = {Simulating a metallicity-dependent initial mass function},\n\turl = {http://adsabs.harvard.edu/abs/2017arXiv171004222G},\n\tabstract = {Observational and theoretical arguments increasingly suggest that the \ninitial mass function (IMF) of stars may depend systematically on\nenvironment, yet most galaxy formation models to date assume a universal\nIMF. Here we investigate simulations of the formation of Milky Way\nanalogues run with an empirically derived metallicity-dependent IMF and\nthe moving-mesh code AREPO in order to characterize the associated\nuncertainties. In particular, we compare a constant Chabrier and a\nvarying metallicity-dependent IMF in cosmological,\nmagneto-hydrodynamical zoom-in simulations of Milky Way-sized halos. We\nfind that the non-linear effects due to IMF variations typically have a\nlimited impact on the morphology and the star formation histories of the\nformed galaxies. Our results support the view that constraints on\nstellar-to-halo mass ratios, feedback strength, metallicity evolution\nand metallicity distributions are in part degenerate with the effects of\na non-universal, metallicity-dependent IMF. Interestingly, the empirical\nrelation we use between metallicity and the high mass slope of the IMF\ndoes not aid in the quenching process. It actually produces up to a\nfactor of 2-3 more stellar mass if feedback is kept constant.\nAdditionally, the enrichment history and the z = 0 metallicity\ndistribution are significantly affected. In particular, the alpha\nenhancement pattern shows a steeper dependence on iron abundance in the\nmetallicity-dependent model, in better agreement with observational\nconstraints.},\n\tjournal = {ArXiv e-prints},\n\tauthor = {Gutcke, Thales A. and Springel, Volker},\n\tmonth = oct,\n\tyear = {2017},\n\tkeywords = {Astrophysics - Astrophysics of Galaxies},\n\tpages = {arXiv:1710.04222},\n}\n\n","author_short":["Gutcke, T. 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