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Proposing Institution

Institut für Astrophysik, ZAH, Universität Heidelberg
Project Manager

Dr. Daniel Ceverino
Albert-Ueberele-Str. 2
69120 Heidelberg
I propose the creation of a large database of numerical models of galaxy formation that will mimic a galaxy survey of the high-redshift Universe, before and after the Reionization Epoch (redshift z=8). This will be the largest sample of zoom simulations of galaxy formation with a spatial resolution better than 10 pc. This database will revolutionize our understanding of cosmic dawn. It will shed light on the distribution of gas, stars, metals and dust in the first galaxies.The comparison with current galaxy surveys will trigger the development of novel feedback models. Ultimately, this mock survey will make predictions about the galaxy population that will be first observed with future facilities, such as the James Webb Space Telescope and the next generation of large telescopes.The simulations will be performed with the N-body+gas-dynamics code, ART. This code uses a zoom approach plus the Adaptive-Mesh-Refinement (AMR) technique to solve the gasdynamics equations with a spatial dynamic range of 6-7 orders of magnitude. ART is a hybrid MPI+OpenMP code that uses domain decomposition of the whole cosmological volume. Each computer node makes refinement of the grid around the distinct region where a single galaxy forms and evolves. This decomposition minimizes the communication between nodes, because only the base grid is common between the nodes. The parallelization within a node is done using OpenMP. Visualizations of the data will be done using Ifrit and yt packages. This project is part of the StarLight project, funded by an ERC advanced grant, led by Prof. Ralf Klessen, Institut für Theoretische Astrophysik.

Impressum, Conny Wendler