0 Assigned ID: 4601 ----- Attempting Submission 1 (Wed May 24 20:29:10 GMT 2023) ----- The circumgalactic medium (CGM) of a galaxy is baryon and metal rich and extends out to its virial radius. Satellite galaxies must move through this halo medium as they orbit the galaxy, and can be quenched as their gas is stripped by the host's CGM. We have identified a sample of 25 spiral galaxies within 15 Mpc for which the properties of the gaseous baryons in their dark matter halos can be measured. 26 G130M and 17 G160M COS archival spectra pass through the virial radii of the halos and cover the entire range of impact radii. The COS observations will be combined to create a generic z=0 spiral galaxy CGM profile to compare to the Milky Way, M31 and other samples. This will help us understand what dictates the CGM properties and the deficit of CGM baryons found for the Milky Way. This local spiral galaxy sample was selected so that 60% of the spirals have their satellite population quantified and the rest will have their satellite population surveyed during the proposal period. The relationship of the CGM to the satellite population will inform galaxy evolution models of galaxy quenching via ram pressure stripping. Prof. Mary Putman is an expert on the circumgalactic medium in the local universe and gaseous dwarf galaxies in the Local Group. She has worked extensively with HI survey data and COS data. Putman is a member of the WALLABY team and has immediate access to the data. Prof. Yong Zheng specializes in studies of the circumgalactic medium and its link to the main body of the galaxy. She has abundant experience comparing observations to simulations and is an expert in COS and HI data reduction. Dr. Zheng has previously proposed for and analyzed FAST data. Jingyao Zhu is a third year graduate student at Columbia University whose thesis work will feature these data. She has experience working with HI survey data and also does simulations of ram pressure stripping of galaxies with Greg Bryan and Stephanie Tonnesen. Dr. Yakov Faerman is a postdoctoral fellow at the University of Washington who specializes in analytical models of the circumgalactic medium. He has recently published his paper outlining the model we will use for this project. Galaxies Intergalactic Medium and the Circumgalactic Medium 0 Regular false false true false false false SUPPORTED