2016/04/07 by Andrew J. Benson, Benson, Andrew J., Chris Cannella +3
Decision Sciences · Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics of Galaxies (astro-ph.GA) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Stellar, planetary, and galactic studies #astro-ph.GA #demographic modeling and climate adaptation
paper · pdf · doi:10.48550/arxiv.1604.02147
Accepted for publication in Computational Astrophysics and Cosmology. Version with full resolution figures available at https://users.obs.carnegiescience.edu/abenson/galacticus/augment.pdf
openalex publication_date 2016/04/07 · arxiv created 2016/08/16 · arxiv updated 2016/08/17 · openalex created_date 2022/10/04 · openalex updated_date 2026/07/28
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.