A candidate polar-ring galaxy in the Subaru Deep Field

作者：Finkelman Ido^*; Graur Or; Brosch Noah

来源：Monthly Notices of the Royal Astronomical Society, 2011, 412(1): 208-212.

DOI：10.1111/j.1365-2966.2010.17899.x

• galaxies: individual: SDSS J132533
• 22+272246
• 7
• galaxies: peculiar
• galaxies: photometry

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 greater than or similar to Gyr old early-type central body surrounded by a faint, narrow inner ring tilted at a similar to 25 degrees 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.

• 出版日期2011-3