Characterization of Bars Induced by Interactions

Inma Martinez-Valpuesta, José Aguerri, César González-García
2016 Galaxies  
Whether the formation of bars is triggered by interactions or by internal processes has been discussed for many decades. In this work, we study differences between both mechanisms by means of numerical simulations. We relate our analysis to fly-by interactions in different mass groups or clusters according to the velocity of the encounters. We find that once the bar is created, the interaction does not much affect its evolution. We also find that bars can be triggered purely by a slow
more » ... by a slow interaction. Those bars affected or triggered by interaction stay for a longer time in the slow regime, i.e., the corotation radius is more than 1.4 times the bar radius.
doi:10.3390/galaxies4020007 fatcat:ueq5liq7tfajbpkh44cirnlf4u