Hernandez-Jimenez, Jose
Brasil – UNIVAP
Inflow Motions in Interacting Pairs of Galaxies
Within λCDM framework, the interactions/mergers between galaxies play an important role to shape the morphology, the stellar and chemical content of the individual galaxies. In particular, one of the main drivers of these changes is the loss of angular momentum of the gas in the disks due to the gravitational torque exerted by its companion. This results in a significant amount of gas flowing into the inner regions of the disk. In consequence, the star-forming/AGN activities turn on and the metallicity distribution and gradients are affected. However, the observational kinematical evidence of the falling gas is still poorly constrained, restricted only to individual studies. In this work, we will present a systematic kinematical study on a sample of 60 interacting galaxies selected from MaNGA DR15. We have modelled their velocity fields in order to search for inflow motions and calculated the inflow rates. We investigated whether there is a correlation between the latter kinematical parameters and star-forming/AGN activity, merger stage and the metallicity distribution of the studied galaxies.