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- W2890838236 abstract "Abstract Merger trees harvested from cosmological N -body simulations encode the assembly histories of dark matter halos over cosmic time and are a fundamental component of semi-analytical models of galaxy formation. The ability to compare the tools used to construct merger trees, namely halo finders and tree building algorithms, in an unbiased and systematic manner is critical to assess the quality of merger trees. In this paper, we present the dendrogram, a novel method to visualise merger trees, which provides a comprehensive characterisation of a halo’s assembly history—tracking subhalo orbits, halo merger events, and the general evolution of halo properties. We show the usefulness of the dendrogram as a diagnostic tool of merger trees by comparing halo assembly simulation analysed with three different halo finders—VELOCI raptor , AHF, and R ockstar —and their associated tree builders. Based on our analysis of the resulting dendrograms, we highlight how they have been used to motivate improvements to VELOCI raptor . The dendrogram software is publicly available online, at: https://github.com/rhyspoulton/MergerTree-Dendrograms ." @default.
- W2890838236 created "2018-09-27" @default.
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- W2890838236 date "2018-01-01" @default.
- W2890838236 modified "2023-10-09" @default.
- W2890838236 title "Observing merger trees in a new light" @default.
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- W2890838236 doi "https://doi.org/10.1017/pasa.2018.34" @default.
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