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We discuss the properties of an object in the Subaru Deep Field (SDF) classified as a galaxy in on‐line data bases and revealed on the Subaru images as a genuine polar‐ring galaxy (PRG) candidate. We analyse available photometric data and conclude that this object consists of a ≳ Gyr old early‐type central body surrounded by a faint, narrow inner ring tilted at a  ∼25°  angle relative to the polar axis of the host galaxy. The halo surrounding the main stellar body exhibits a diversity of spatially extended stellar features of low surface brightness, including a faint asymmetric stellar cloud and two prominent loops. These faint features, together with the unperturbed morphology of the central host, are clear signs of a recent coalescence of two highly unequal mass galaxies, most likely a pre‐existing early‐type galaxy and a close‐by gas‐rich dwarf galaxy. The presumed stellar remnants observed near the edges of the ring, including possibly the surviving captured companion itself, indicate that the merger is still taking place.

A candidate polar‐ring galaxy in the Subaru Deep Field