{
  "id": "1903.03647",
  "version": "v1",
  "published": "2019-03-08T19:57:02.000Z",
  "updated": "2019-03-08T19:57:02.000Z",
  "title": "Variations of the stellar Initial Mass Function in Semi-Analytic Models: implications for the mass assembly of galaxies in the GAEA model",
  "authors": [
    "Fabio Fontanot"
  ],
  "comment": "4 Pages, 2 Figures, Proceedings of IAU symposium 341, \"PanModel2018: Challenges in Panchromatic Galaxy Modelling with Next Generation Facilities\", Osaka, Japan",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "A wealth of observations recently challenged the notion of a universal stellar initial mass function (IMF) by showing evidences in favour of a variability of this statistical indicator as a function of galaxy properties. I present predictions from the semi-analytic model GAEA (GAlaxy Evolution and Assembly), which features (a) a detailed treatment of chemical enrichment, (b) an improved stellar feedback scheme, and (c) implements theoretical prescriptions for IMF variations. Our variable IMF realizations predict intrinsic stellar masses and mass-to-light ratios larger than those estimated from synthetic photometry assuming a universal IMF. This provides a self-consistent interpretation for the observed mismatch between photometrically inferred stellar masses of local early-type galaxies and those derived by dynamical and spectroscopic studies. At higher redshifts, the assumption of a variable IMF has a deep impact on our ability to reconstruct the evolution of the galaxy stellar mass function and the star formation history of galaxies.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-03-08T19:57:02.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "stellar initial mass function",
      "semi-analytic model",
      "predict intrinsic stellar masses",
      "gaea model",
      "imf realizations predict intrinsic"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}