Rokas Žemaitis

The elusive low surface brightness components of galaxies – such as stellar halos and tidal features – are crucial components for understanding the way in which galaxies grow as well as for tracing their dark matter halos. I will present results from a state-of-the-art survey designed to probe low surface brightness structures in the nearby M81 Group. Using Hyper Suprime-Cam on the Subaru Telescope, our survey maps individual red giant branch stars over more than 11 square degrees. In this poster, I will present a giant tidal stream that we have discovered from the M81 Group dwarf galaxy F8D1, discussing its characteristics and the origin of its disruption. I will also discuss how this disruption might explain the properties of F8D1 itself, which is one of the closest known examples of the ultra-diffuse galaxy population.