Uncovering the Ghostly Remains of an Extremely Diffuse Satellite in the Remote Halo of NGC 253

Sakurako Okamoto, Annette M. N. Ferguson, Nobuo Arimoto +12

We present the discovery of NGC253-SNFC-dw1, a new satellite galaxy in the remote stellar halo of the Sculptor Group spiral, NGC 253. The system was revealed using deep resolved st…