0 Assigned ID: 965 ----- Attempting Submission 1 (Fri Apr 08 23:00:25 GMT 2016) ----- The characterization of the multiphase circumgalactic medium (CGM) around low-redshift galaxies has been a key development enabled by COS. Yet we still have a poor understanding of the spatial relationships between the various phases of the CGM, which limits our grasp of the mechanisms by which gas is expelled from and accretes (back) onto galaxies. To address this fundamental limitation, we propose an archival program to develop new, more robust, tools for extracting the information encoded in the kinematic profiles of low-ion and high-ion absorption in the COS CGM dataset. These profiles contain a wealth of information on the dynamics and sub-structure of the CGM, yet their vast potential remains untapped. We propose to apply our unique approach of statistically comparing absorption line profiles in the vast COS/FUV data contained in the newly-released Hubble Spectroscopic Legacy Archive (HSLA). With our complementary MISTY project, which generates synthetic spectra from hydrodynamic simulations, we will for the first time be able to apply our technique to carefully-simulated data. This joint approach will provide a deeper understanding of the basic structure of the CGM and its role in the baryon cycle. Intergalactic Medium and Cosmology 0 Regular false true false SUPPORTED