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Small-scale galaxy clustering in the eagle simulation

Artale, M. Celeste; Pedrosa, Susana E.; Trayford, James W.; Theuns, Tom; Farrow, Daniel J.; Norberg, Peder; Zehavi, Idit; Bower, Richard G.; Schaller, Matthieu

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Authors

M. Celeste Artale

Susana E. Pedrosa

James W. Trayford

Daniel J. Farrow

Idit Zehavi

Richard G. Bower



Abstract

We study present-day galaxy clustering in the EAGLE cosmological hydrodynamical simulation. EAGLE’s galaxy formation parameters were calibrated to reproduce the redshift z = 0.1 galaxy stellar mass function, and the simulation also reproduces galaxy colours well. The simulation volume is too small to correctly sample large-scale fluctuations and we therefore concentrate on scales smaller than a few mega parsecs. We find very good agreement with observed clustering measurements from the Galaxy And Mass Assembly (GAMA) survey, when galaxies are binned by stellar mass, colour or luminosity. However, low-mass red galaxies are clustered too strongly, which is at least partly due to limited numerical resolution. Apart from this limitation, we conclude that EAGLE galaxies inhabit similar dark matter haloes as observed GAMA galaxies, and that the radial distribution of satellite galaxies, as a function of stellar mass and colour, is similar to that observed as well.

Citation

Artale, M. C., Pedrosa, S. E., Trayford, J. W., Theuns, T., Farrow, D. J., Norberg, P., …Schaller, M. (2017). Small-scale galaxy clustering in the eagle simulation. Monthly Notices of the Royal Astronomical Society, 470(2), 1771-1787. https://doi.org/10.1093/mnras/stx1263

Journal Article Type Article
Acceptance Date May 19, 2017
Online Publication Date May 23, 2017
Publication Date Sep 11, 2017
Deposit Date Aug 18, 2017
Publicly Available Date Mar 29, 2024
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 470
Issue 2
Pages 1771-1787
DOI https://doi.org/10.1093/mnras/stx1263

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Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.





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