2018AJ....156..166P

We study a gas-rich merging dwarf system KUG 0200-096. Deep optical imaging reveals an optically faint tail with a length of 20 kpc, giving a visual impression of tidal antenna similar to NGC 4038/39. The interacting dwarf galaxies have B-band absolute magnitudes of -18.06 and -16.63 mag. We identify a young stellar clump with a stellar mass of 2 x 10⁷ M_☉ at the tip of the antenna, possibly a tidal dwarf galaxy (TDG). The putative TDG candidate is quite blue with a g - r color index of -0.07 mag, whereas the interacting dwarf galaxies have g - r color indices 0.29 and 0.19 mag. The TDG is currently forming stars at the rate of 0.02 M_☉ yr^–1. We obtained H I 21 cm line data of KUG 0200-096 using the Giant Metrewave Radio Telescope to get a more detailed view of neutral hydrogen (H I) emission in interacting dwarf galaxies and its TDG. Evidence of a merger between the dwarf galaxy pair is also present in H I kinematics and morphology where we find the H I contents of the interacting pair is disturbed, forming an extended tail toward the TDG. The H I velocity field shows a strong gradient along the H I tidal tail extension. We present a comparative study between the Antennae galaxy, NGC 4038/39, and KUG 0200-096 in both optical and H I gas properties and discuss the possible origin of the KUG 0200-096 TDG.