MORPHOLOGICAL STUDY of A SAMPLE of DWARF TIDAL GALAXIES USING the C-A PLANE

In this investigation, we determined the Concentration (C) and Asymmetry (A) parameters in a sample of tidal dwarf galaxies (TDG) or candidate galaxies. Most of the galaxies in the sample were found to be in a very precise region of the C-A plane, which clearly separates them from other galaxies. In addition, the stellar mass (M_star) and the star formation rate (SFR) in the sample were determined using optical images and GALEX observations. The main results are: the M_star and the SFR in the TDG sample do not follow a linear correlation with the C and A respectively, as observed in the rest of galaxies, and the M_star and the SFR have a linear correlation similar to that followed by galaxies at high redshift. Then, we can conclude that the C-A plane can be a useful method for the morphological identification of candidates for TDG or dwarf objects from very turbulent environments.