Morphological study of a sample of dwarf tidal galaxies using the C-A plane

Abstract

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.

12 pages, 8 figures

References in corpus (7)

• The Fundamental Properties of Galaxies and a New Galaxy Classification System
• A robust morphological classification of high-redshift galaxies using support vector machines on seeing limited images. I Method description
• Holmberg Ix: The Nearest Young Galaxy
• NGC 4656UV: A UV-selected Tidal Dwarf Galaxy Candidate
• HI in the Arp 202 system and its tidal dwarf candidate
• Interacting galaxy NGC4656 and its unusual dwarf companion
• Arp 202: a TDG formed in a parent's extended dark matter halo?

Cited by in corpus (1)

• The Next Generation Virgo Cluster Survey (NGVS). XL. The Morphological Classification of Virgo Cluster Galaxies