0 Assigned ID: 349 ----- Attempting Submission 1 (Fri Mar 06 00:03:31 GMT 2020) ----- HST Phase I Proposal 349 successfully submitted. Receipt: # 349-1 ----- Attempting Submission 2 (Fri Mar 06 23:12:39 GMT 2020) ----- HST Phase I Proposal 349 successfully submitted. Receipt: # 349-2 ----- Attempting Submission 3 (Fri Mar 06 23:58:58 GMT 2020) ----- Galaxies form in a complex ecosystem, with metal-rich and metal-poor gas cycling in, out, and around galaxies on rapid timescales. Resolved views of the metallicities of galaxies offer an intimate view into this cycle. The Hubble Space Telescope has enabled rapid progress on this front, but a direct bridge between these observations and theoretical predictions is missing. We propose to investigate the rapid evolution of the spatially-resolved gas metallicities of high-redshift star-forming galaxies using a suite of state-of-the-art hydrodynamical galaxy formation simulations. We will quantify the distinct roles that star-formation, accretion, merging, and radial migration play in (re-)distributing metals within and around galaxies. We will measure the timescales over which these mechanisms act, and search for unique signatures they impart on the metallicity profiles of the simulated galaxies. Critically, we will create synthetic Hubble grism spectroscopy to test predictions from the simulations against real observations. All software, simulation meta-data, and synthetic observations generated from this proposal will be packaged as navigable products and publicly released. The PI and Co-Is have a cross-section of experience that is uniquely suited to the goals of this proposal. PI Simons and Co-I Snyder have expertise in generating and analyzing simulated Hubble data from galaxy formation simulations using SUNRISE (Simons+ 19, Snyder et al. 15ab, 19). They have also demonstrated experience in publicly releasing and advertising the associated synthetic data products, see e.g., https://archive.stsci.edu/prepds/illustris/ https://archive.stsci.edu/prepds/vela/ Co-Is Peeples, Tumlinson, Lochhaas, Augustin, along with PI Simons, are core members of the FOGGIE collaboration and have significant experience analyzing the simulations. Co-Is Momcheva, Papovich, and Matharu, along with PI Simons, are core members of the HST/CLEAR collaboration and have significant experience analyzing and interpreting grism observations. They are also intimately familiar with the observational software relevant for this proposal. Galaxies 0 Regular false false false true false SUPPORTED