![Image illustrating the comparison between an active spiral galaxy (orange box) and its non-active twin (blue box). Credit: Gabriel Pérez Díaz, SMM (IAC). Image illustrating the comparison between an active spiral galaxy (orange box) and its non-active twin (blue box). Credit: Gabriel Pérez Díaz, SMM (IAC).](/sites/default/files/styles/crop_square_2_2_to_320px/public/images/news/Comparativa%20galaxias%20espirales%20activa%20y%20no%20activa.jpg?h=95aa77d3&itok=9a4xuqC3)
A study led by researchers at the Instituto de Astrofísica de Canarias (IAC), making comparison between the discs of several pairs of spiral galaxies, active and non-active, concludes that in the discs of the former the rotational motion of the stars is of greater importance. This study, just accepted for publication in Astronomy & Astrophysics Letters, is the first evidence for large scale dynamical differences between active and non-active galaxies in the local universe. The astronomers participating are from the Instituto de Astrofísica de Canarias (IAC) and the University of La Laguna
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