Maratus: mapping the circumgalactic medium through UV narrowband imaging

We present the experimental design of Maratus, a proposed 6U cubesat designed to map the circumgalactic medium of nearby galaxies. We leverage recent work in absorption line measurements of the gas near galaxies, improved far ultraviolet optical component performance, and the flexibility of the cubesat platform to create a pathfinding experiment at relatively low cost. We outline the key motivations behind such a mission, present the technical approach and feasibility measures, and conclude by highlighting the role Maratus can play in supporting upcoming larger scale missions, such as the Habitable Worlds Observatory.