A new galaxy near the Local Group in Draco
/ Authors
/ Abstract
. We present HST WFPC2 and ground-based images of the low surface brightness dwarf Irr/Sph galaxy KKR 25 in Draco. Its colour-magnitude diagram shows red giant branch stars with the tip at I = 22 . m 32, and the presence of some blue stars. The derived true distance modulus, 26 . m 35 ± 0 . m 14, corresponds to linear distances of KKR 25 from the Milky Way and from the Local Group centroid of 1.86 and 1.79 Mpc, respectively. The absolute magnitude of the galaxy, M V = − 10 . 48, its linear diameter ( 0.54 Kpc) and central surface brightness (Σ 0 ,V = 24 . m 0 ± 0 . m 2 / ⊓⊔ ′′ ) are typical of other dIrr/dSphs in the Local Group. Being situated just beyond the radius of the zero-velocity surface of the Local Group, KKR 25 moves away from the LG centroid at a velocity of V LG = +72 km/s.