A re-examination of some bar-driven models of spiral structure

Details A re-examination of some bar-driven models of spiral structure A re-examination of some bar-driven models of spiral structure

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.212..677s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 212, Feb. 1, 1985, p. 677-686.

Astronomy and Astrophysics

Astronomy

48

Barred Galaxies, Galactic Structure, Gas Dynamics, Rotating Matter, Spiral Galaxies, Morphology, Particle Theory, Ring Structures

Scientific paper

Some numerical experiments by Schempp of gas response to a rotating bar potential are repeated using a particle scheme to simulate the gas dynamics. Schempp's results are shown to be dependent on the disruptive way he turns on the bar. Quasi-static models unaffected by transients are computed. The shocks which develop are in significantly different positions from those of Schempp, and the bar rotation rate is shown to have no effect on whether the morphology is ringed or spiral. Furthermore the spiral structure is not confined to inside corotation, but extends outward past the outer Lindblad resonance. It is shown that inner rings and straight dust lanes require different sorts of bar field for their formation.

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