Abstract
This work is based on r' and g' images and long-slit spectra obtained with the GMOS at the Gemini South Telescope. We detected a tidal tail in the main galaxy (AM 1219A) and a bridge of material connecting the galaxies. The surface brightness profile of AM 1219A was decomposed into bulge and disc components. The profile shows a light excess of ∼ 53 % due to the contribution of star-forming regions. On the other hand, the surface brightness profile of the secondary galaxy shows a lens structure in addition to the bulge and disc. The rotation curve of AM 1219A is quite asymmetric, suggesting a gas perturbed by interaction. The overall best-fitting solution for the mass distribution of AM 1219A was found with M/L for bulge and disc of Υ_{b}=2.8_{-0.4}^{+0.4} and Υ_{d}=2.4_{-0.2}^{+0.3}, respectively, and a NFW profile of M_{200}=2.0_{-0.4}^{+0.5}× 10^{12} M_{odot } and c=16.0_{-1.1}^{+1.2}.
