Mathematics – Logic
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012hell.conf...21p&link_type=abstract
10th Hellenic Astronomical Conference, Proceedings of the conference held at Ioannina, Greece, 5-8 September 2011. Edited by Io
Mathematics
Logic
Scientific paper
I will review the dynamical mechanisms that have been found to shape the observed structures of disk galaxies, such as the spirals and the bars. The morphological properties of the spiral arms will be described in association with different dynamical mechanisms that have been proposed to build them. Differences are expected due to the fact that the spirals can be reinforced by stars in regular or in chaotic motion. Also in bars chaos may contribute to the observed morphologies in percentages that vary from case to case. I will also discuss the vertical structure of disk galaxies and the possible contribution of chaotic orbits to their density profiles away from the equatorial plane.
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