Added a sentence to abstract. -1107104315 Assigned ID: 190 ----- Attempting Submission 1 (Thu Apr 07 04:36:03 GMT 2016) ----- HST Phase I Proposal 190 (cycle24_APT.apt) successfully submitted. Receipt: # 190-1 ----- Attempting Submission 2 (Thu Apr 07 16:23:57 GMT 2016) ----- HST Phase I Proposal 190 (cycle24_APT.pdf.apt) successfully submitted. Receipt: # 190-2 ----- Attempting Submission 3 (Fri Apr 08 17:50:28 GMT 2016) ----- Today's highest resolution cosmologically-based hydrodynamic simulations fail to resolve the fragmentation scale of cool clouds condensing out of a hot, ambient halo. These clouds are likely responsible for the majority of quasar absorption lines observed in the CGM by the COS on Hubble. We propose to develop a completely new cloud model following the condensation, propagation, and destruction of clouds surrounded by a hot halo medium. Our unique model resolves physics far below the scales of zoom hydro simulations, while its flexible and statistical implementation allows a rapid parameter exploration not possible using high-resolution idealized simulations. Three features separate our exploration of CGM physics from similar studies: 1) using robust inputs from state-of-the-art zoom simulations that reproduce key CGM observations and constrain the radial profiles of density, metallicity, and temperature, 2) using the latest cooling and ionization tables that account for non-equilibrium effects in the presence of an ionizing background, and 3) generation of mock spectra for direct comparison with the rich datasets available from COS observations. We will concentrate on the physics regulating cloud formation, transport, and dissipation under the influence of a hot, ambient halo medium in halos ranging from Milky Way to cluster scales. A central question we hope to answer is why passive, red galaxies appear to have as much cool CGM gas as active, star-forming galaxies. We will also model cloud velocities, absorption line widths, and the implications for High Velocity Clouds. We will publicly release our code to the community for wider use. Intergalactic Medium and Cosmology 0 Regular false false true SUPPORTED