Shape and amplitude of spiral arms

Details Shape and amplitude of spiral arms Shape and amplitude of spiral arms

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasp..105..651g&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 688, p. 651-653.

Astronomy and Astrophysics

Astronomy

9

Computerized Simulation, Galactic Structure, Infrared Astronomy, Mathematical Models, Spiral Galaxies, Azimuth, Morphology

Scientific paper

The variation of the azimuthal shape of spiral arms is estimated through numerical models simulating a two-armed spiral perturbation in galactic disks. Significant changes as a function of perturbation amplitude and location relative to resonances are found. Models with radial force perturbations larger than 5 percent show significant nonlinear effects. These results are compared with observations of NGC 5247 in the K-prime filter, which indicates that its spiral perturbation is nonlinear.

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