Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
Type: Journal article
Title: Making galaxies in a cosmological context: the need for early stellar feedback
Author: Stinson, G.S.
Brook, C.
Macciò, A.V.
Wadsley, J.
Quinn, T.R.
Couchman, H.M.P.
Citation: Monthly Notices of the Royal Astronomical Society, 2013; 428(1):129-140
Publisher: Oxford University Press
Issue Date: 2013
ISSN: 0035-8711
Statement of
G.S. Stinson, C. Brook, A.V. Macciò, J. Wadsley, T.R. Quinn, and H.M.P. Couchman
Abstract: We introduce the Making Galaxies In a Cosmological Context (MAGICC) programme of smoothed particle hydrodynamics simulations. We describe a parameter study of galaxy formation simulations of an L* galaxy that uses early stellar feedback combined with supernova feedback to match the stellar mass–halo mass relationship. While supernova feedback alone can reduce star formation enough to match the stellar mass–halo mass relationship, the galaxy forms too many stars before z = 2 to match the evolution seen using abundance matching. Our early stellar feedback is purely thermal and thus operates like an ultraviolet ionization source as well as providing some additional pressure from the radiation of massive, young stars. The early feedback heats gas to >10⁶ K before cooling it to 10⁴ K. The pressure from this hot gas creates a more extended disc and prevents more star formation prior to z = 1 than supernova feedback alone. The resulting disc galaxy has a flat rotation curve, an exponential surface brightness profile, and matches a wide range of disc scaling relationships. The disc forms from the inside-out with an increasing exponential scale length as the galaxy evolves. Overall, early stellar feedback helps to simulate galaxies that match observational results at low and high redshifts.
Keywords: Hydrodynamics; galaxies: formation; galaxies: ISM
Rights: © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
DOI: 10.1093/mnras/sts028
Published version:
Appears in Collections:Aurora harvest 8
Physics publications

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.