Pattern speeds in barred spiral galaxies

Details Pattern speeds in barred spiral galaxies Pattern speeds in barred spiral galaxies

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.231p..25s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 231, March 1, 1988, p. 25P-31P.

Astronomy and Astrophysics

Astronomy

112

Barred Galaxies, Galactic Rotation, Galactic Structure, Many Body Problem, Astronomical Models, Computerized Simulation, Corotation

Scientific paper

Current theoretical ideas of the pattern speeds of the bar and spiral arms in SB galaxies appear to conflict with the observational evidence. This difficulty can be avoided if the spiral arms have a lower pattern speed than the bar. The authors present evidence of multiple pattern speeds in their N-body simulations, and show that, though the spiral continually breaks from and reconnects to the bar, the morphology of the pattern at all times resembles that of barred galaxies in the sky. They briefly discuss how the gas might respond to the multiple patterns.

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