Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.211p...1p&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 211, Nov. 1, 1984, p. 1P-5P.
Astronomy and Astrophysics
Astronomy
5
Astronomical Models, Barred Galaxies, Galactic Structure, Fourier Series, Poisson Equation, Polar Coordinates
Scientific paper
It is pointed out that current understanding of the dynamics of two-dimensional bars and oval distortions is to a large degree based on numerical work performed by various authors, including Sanders and Huntley (1976) and Contopoulos (1978, 1983). This work has been based on the employment of a simple bar potential. The considered potential is created by a bar with a surface density of similar form. The characteristics of two of the most often employed bar models in the literature are discussed. It is concluded that for an examination of the dynamics of bars which are something more than just oval distortions, higher order harmonics should be included in the potential. It is found that the simple 'bar' models often used in theoretical studies are not suited for the study of bars in galaxies.
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