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Galaxies 2016, 4(2), 7; doi:10.3390/galaxies4020007

Characterization of Bars Induced by Interactions

1
Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerif, Spain
2
Dpto. Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Tenerife, Spain
3
Instituto de Ciencias del Patrimonio, CSIC, Santiago de Compostela 15704, A Coruña, Spain
*
Author to whom correspondence should be addressed.
Academic Editors: Enrichetta Iodice and Alexei Moiseev
Received: 15 October 2015 / Revised: 6 May 2016 / Accepted: 19 May 2016 / Published: 25 May 2016
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Abstract

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 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. View Full-Text
Keywords: interacting galaxies; cluster of galaxies; groups of galaxies interacting galaxies; cluster of galaxies; groups of galaxies
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Martinez-Valpuesta, I.; Aguerri, J.A.L.; González-García, C. Characterization of Bars Induced by Interactions. Galaxies 2016, 4, 7.

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