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Achieving convergence in galaxy formation models by augmenting N-body merger trees.

Benson, A. J. and Cannella, C. and Cole, S. (2016) 'Achieving convergence in galaxy formation models by augmenting N-body merger trees.', Computational astrophysics and cosmology., 3 . p. 3.

Abstract

Accurate modeling of galaxy formation in a hierarchical, cold dark matter universe requires the use of sufficiently high-resolution merger trees to obtain convergence in the predicted properties of galaxies. When semi-analytic galaxy formation models are applied to cosmological N-body simulation merger trees, it is often the case that those trees have insufficient resolution to give converged galaxy properties. We demonstrate a method to augment the resolution of N-body merger trees by grafting in branches of Monte Carlo merger trees with higher resolution, but which are consistent with the pre-existing branches in the N-body tree. We show that this approach leads to converged galaxy properties.

Item Type:Article
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Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1186/s40668-016-0016-3
Publisher statement:© 2016 Benson et al. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Date accepted:17 August 2016
Date deposited:06 October 2016
Date of first online publication:22 August 2016
Date first made open access:No date available

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