Properties of galaxies reproduced by a hydrodynamic simulation
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Author(s)
Genel, S.
Springel, V.
Torrey, P.
Sijacki, D.
Xu, D.
Snyder, G.
Bird, S.
Nelson, Dylan
Hernquist, L.
Vogelsberger, Mark
Date Issued
May 2014
Journal
Nature
Publisher
Nature Publishing Group
Citation
Vogelsberger, M., S. Genel, V. Springel, P. Torrey, D. Sijacki, D. Xu, G. Snyder, S. Bird, D. Nelson, and L. Hernquist. “Properties of galaxies reproduced by a hydrodynamic simulation.” Nature 509, no. 7499 (May 7, 2014): 177-182.
Version
Author's final manuscript
Abstract
Previous simulations of the growth of cosmic structures have broadly reproduced the ‘cosmic web’ of galaxies that we see in the Universe, but failed to create a mixed population of elliptical and spiral galaxies, because of numerical inaccuracies and incomplete physical models. Moreover, they were unable to track the small-scale evolution of gas and stars to the present epoch within a representative portion of the Universe. Here we report a simulation that starts 12 million years after the Big Bang, and traces 13 billion years of cosmic evolution with 12 billion resolution elements in a cube of 106.5 megaparsecs a side. It yields a reasonable population of ellipticals and spirals, reproduces the observed distribution of galaxies in clusters and characteristics of hydrogen on large scales, and at the same time matches the ‘metal’ and hydrogen content of galaxies on small scales.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1038/nature13316
