Quick Search:

uzh logo
Browse by:
bullet
bullet
bullet
bullet

Zurich Open Repository and Archive 

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-41499

Agertz, O; Teyssier, R; Moore, B (2011). The formation of disc galaxies in a ΛCDM universe. Monthly Notices of the Royal Astronomical Society, 410(2):1391-1408.

[img] PDF (Verlags-PDF) - Registered users only
11MB
[img]
Preview
Accepted Version
PDF (Version 2)
1MB
[img]
Preview
Accepted Version
PDF (Version 1)
1MB

Abstract

We study the formation of disc galaxies in a fully cosmological framework using adaptive mesh refinement simulations. We perform an extensive parameter study of the main subgrid processes that control how gas is converted into stars and the coupled effect of supernovae feedback. We argue that previous attempts to form disc galaxies have been unsuccessful because of the universal adoption of strong feedback combined with high star formation efficiencies. Unless extreme amounts of energy are injected into the interstellar medium during supernovae events, these star formation parameters result in bulge-dominated S0/Sa galaxies as star formation is too efficient at z ~ 3. We show that a low efficiency of star formation more closely models the subparsec physical processes, especially at high redshift. We highlight the successful formation of extended disc galaxies with scalelengths rd = 4-5 kpc, flat rotation curves and bulge-to-disc ratios of B/D ~ 1/4. Not only do we resolve the formation of a Milky Way-like spiral galaxy, we also observe the secular evolution of the disc as it forms a pseudo-bulge. The disc properties agree well with observations and are compatible with the photometric and baryonic Tully-Fisher relations, the ΣSFR -Σgas (Kennicutt-Schmidt) relation and the observed angular momentum content of spiral galaxies. We conclude that the underlying small-scale star formation physics plays a greater role than previously considered in simulations of galaxy formation.

Other titles:The formation of disc galaxies in a LCDM universe
Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute for Computational Science
DDC:530 Physics
Language:English
Date:2011
Deposited On:02 Mar 2011 11:04
Last Modified:27 Nov 2013 22:36
Publisher:Wiley-Blackwell
ISSN:0035-8711
Additional Information:The definitive version is available at www.blackwell-synergy.com
Publisher DOI:10.1111/j.1365-2966.2010.17530.x
Related URLs:http://arxiv.org/abs/1004.0005
Citations:Web of Science®. Times Cited: 99
Google Scholar™
Scopus®. Citation Count: 98

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page