Search and Study of Ring Galaxies of Accretion Nature

The formation of ring in galaxy disks via accretion of external matter used to seem rather exotic. However, in recent years, more examples of similar objects of an accretion nature are being discovered. We use data from the SDSS/MaNGA survey obtained with IFU spectroscopy to conduct a statistical study of that phenomenon. From a sample of 10 197 MaNGA galaxies, 259 ring galaxies of all types were selected. This paper examines the distribution of rings on the mass-metallicity and luminosity-metallicity diagrams for ionised gas. The focus is on the rings with lower metallicity, which may be related to the recent accretion of low-metal gas.