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The relation between galaxy morphology and colour in the EAGLE simulation

Correa, CA and Schaye, J and Clauwens, B and Bower, RG and Crain, RA and Schaller, M and Theuns, T and Thob, ACR (2017) The relation between galaxy morphology and colour in the EAGLE simulation. Monthly Notices of the Royal Astronomical Society Letters, 472 (1). L45-L49. ISSN 1745-3933

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Abstract

We investigate the relation between kinematic morphology, intrinsic colour and stellar mass of galaxies in the EAGLE cosmological hydrodynamical simulation. We calculate the intrinsic u-r colours and measure the fraction of kinetic energy invested in ordered corotation of 3562 galaxies at z=0 with stellar masses larger than $10^{10}M_{\odot}$. We perform a visual inspection of gri-composite images and find that our kinematic morphology correlates strongly with visual morphology. EAGLE produces a galaxy population for which morphology is tightly correlated with the location in the colour- mass diagram, with the red sequence mostly populated by elliptical galaxies and the blue cloud by disc galaxies. Satellite galaxies are more likely to be on the red sequence than centrals, and for satellites the red sequence is morphologically more diverse. These results show that the connection between mass, intrinsic colour and morphology arises from galaxy formation models that reproduce the observed galaxy mass function and sizes.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society Letters ©: 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Related URLs:
Date Deposited: 18 Oct 2017 11:52
Last Modified: 18 Oct 2017 11:52
DOI or Identification number: 10.1093/mnrasl/slx133
URI: http://researchonline.ljmu.ac.uk/id/eprint/7383

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