An AAT/2dF Spectrograph Survey of low Galactic latitudes targeting the putative Canis Major dwarf galaxy , and the ( possibly ) associated tidal debris of stars known as the Monoceros Ring , covering Galactic coordinates 231.5 ^ { \circ } < l < 247.5 ^ { \circ } and -11.8 ^ { \circ } < b < -3.8 ^ { \circ } , has revealed the presence of the Monoceros Ring in the background of the Canis Major dwarf galaxy .
This detection resides at a galactocentric distance of \sim 18.9 \pm 0.3 kpc ( 13.5 \pm 0.3 kpc heliocentric ) , exhibiting a velocity of \sim 132.8 \pm 1.3 { km s ^ { -1 } } with a dispersion of \sim 22.7 \pm 1.7 { km s ^ { -1 } } ; both of these comparable with previous measurements of the Monoceros Ring in nearby fields .
This detection highlights the increasing complexity of structure being revealed in recent surveys of the Milky Way thick disk and Halo .