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We present radio observations of the galaxy merger remnant Mrk 212 with theKarl G. Jansky Very Large Array (VLA) and the upgraded Giant Meter RadioTelescope (uGMRT). Mrk 212 has two previously known radio sources associatedwith the two optical nuclei, S1 and S2, with a projected separation of ~6 kpc,making it a dual active galactic nuclei (AGN) candidate. Our new 15 GHz VLAobservations reveal that S1 is a double radio source centred around the opticalnucleus; its total extent is ~750 parsec and its average 1.4-8.5 GHz spectralindex is -0.81 +/- 0.06. S1 therefore, resembles a compact symmetric object(CSO). The 15 GHz VLA image identifies the radio source at S2 to be a compactcore. Our radio observations therefore strongly support the presence of a dualAGN in Mrk 212. The optical emission line flux ratios obtained from theHimalayan Chandra Telescope (HCT) observations however, show that S1 and S2both fall in the AGN + SF (star formation) region of the BPT diagram. Weak AGNlying in the SF or AGN + SF intermediate regions in the BPT diagram have indeedbeen reported in the literature; our sources clearly fall in the same category.We find an extended radio structure in our newly reduced 8.5 GHz VLA data, thatis offset by ~1" from the optical nucleus S2. New deep FUV and NUV observationswith the Ultraviolet Imaging Telescope (UVIT) aboard AstroSat reveal SF knotsaround S2 as well as kpc-scale tidal tails; the SF knots around S2 coincidewith the extended radio structure detected at 8.5 GHz. The radio spectralindices are consistent with SF. Any possible association with the AGN in S2 isunclear at this stage.

A Multi-wavelength Study of the Dual Nuclei in Mrk 212