Ubiquitous signs of interactions in early-type galaxies with prolate rotation

  title={Ubiquitous signs of interactions in early-type galaxies with prolate rotation},
  author={Ivana Ebrov'a and Michal B'ilek and Ana Vudragovi'c and Mustafa K. Yıldız and P.-A. Duc},
  journal={Astronomy and Astrophysics},
A small fraction of early-type galaxies (ETGs) show prolate rotation, i.e. they rotate around their long photometric axis. In simulations, certain configurations of galaxy mergers are known to produce this type of rotation. We investigate the association of prolate rotation and signs of galaxy interactions among the observed galaxies. We collected a sample of 19 nearby ETGs with distinct prolate rotation from the literature and inspected their ground-based deep optical images for interaction… 

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