The solitary star cluster of the Andromeda XXV dwarf spheroidal
We present Hubble Space Telescope Advanced Camera for Surveys observations of Gep I, a globular cluster (GC) candidate in the low-mass (M⋆ ~ 6.5 × 105 M⊙) M31 dwarf spheroidal (dSph) satellite Andromeda XXV (And XXV). We confirm the nature of this object and provide the first detailed characterisation of its resolved...