Association of the overdensity near NGC 4765

Ascertain whether the overdensity facing the eastern shell of NGC 4765 is at the same distance as NGC 4765, thereby determining if it is physically associated with the galaxy.

Background

The object NGC 4765 exhibits a shell feature and an adjacent overdensity. Establishing the distance to the overdensity is necessary to confirm whether it is a satellite, a tidal remnant, or a background/foreground source, which affects interpretation of the accretion morphology.

The authors explicitly state that it is not clear if the overdensity is at the same distance as the galaxy, leaving an object-specific association question open.