Measuring the metallicity and density profile of the hot CGM

We are finally entering the era of studying the hot circumgalactic medium aroundnearby spiral galaxies observationally, in the wake of several recent detectionsout to 50 kpc. This hot gas records a galaxy.s history of feedback and accretionprocesses, and therefore it holds a number of important clues for understandinggalaxy formation. Two especially important parameters are the metallicity of thegas and the density profile beyond 50 kpc, as these observables reveal theorigin of the gas and constrain its total mass. Here we propose a followupobservation of the giant spiral NGC 1961, in a mosaic pattern, in order tomeasure the metallicity of the CGM gas from 2550 kpc, and its density profilefrom 50100 kpc. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]