0 Assigned ID: 82 ----- Attempting Submission 1 (Mon Mar 02 17:25:17 GMT 2020) ----- HST Phase I Proposal 82 successfully submitted. Receipt: # 82-1 ----- Attempting Submission 2 (Thu Mar 05 19:13:05 GMT 2020) ----- The extinction of UV-NIR photons from starlight by cosmic dust represents a significant uncertainty in the derivation of galaxy physical properties. While HST has played a foundational role in deriving dust extinction laws in the Galaxy and nearby systems, these observations have demonstrated that there is significant dispersion in the reddening law both from sightline to sightline in the Milky Way, as well as from galaxy to galaxy in the Local Group. No universal dust extinction law exists. The fundamental goal of this Theory/AR proposal is to deploy new hydrodynamic galaxy formation simulations that model the formation, growth, and destruction of dust over cosmic time to provide the first cosmologically motivated model for dust extinction laws in galaxies. This on-the-fly model includes the detailed physics of dust formation in stellar ejecta, growth in the ISM, and destruction processes. Our goal with these models is to use the simulation data products to: [1] develop an understanding for the origin of and expected dispersion amongst extinction laws in Local Group-like galaxies; and [2] develop a modern parameterization of the dust extinction law in order to facilitate the interpretation of UV-NIR HST observations toward star clusters and galaxies. Desika Narayanan (PI; University of Florida, Assistant Professor) is the PI of the dust in simba project series, an active developer of the SIMBA cosmological simulations, and advising graduate student Qi Li in the implementation and modeling of dust physics in SIMBA. Romeel Dave (Co-I; Royal Observatory, Edinburgh Professor) is the lead developer of the SIMBA cosmological simulation series. Qi Li (Co-I; University of Florida, Graduate Student) is the lead developer of the dust physics in the SIMBA cosmological simulations, and will lead the proposed analysis. The proposed analysis comprises the remainder of Qi Li's PhD thesis at the University of Florida. Paul Torrey (Co-I; University of Florida, Assistant Professor) is an expert in the implementation of dust in galaxy formation simulations, and has co-authored a number of publications investigating algorithms for dust physics in the AREPO moving mesh code. Galaxies 0 Regular false false false true false SUPPORTED