Interarm vortices predicted by laboratory simulation of spiral structure

Details Interarm vortices predicted by laboratory simulation of spiral structure Interarm vortices predicted by laboratory simulation of spiral structure

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pazh...12..504n&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 12, July 1986, p. 504-521) Soviet Astronomy Letters (ISSN 0360-0327), vol. 12, July-Aug

Astronomy and Astrophysics

Astronomy

8

Galactic Rotation, Spiral Galaxies, Vortices, Angular Velocity, Density Wave Model, Galactic Structure, Particle Motion, Radial Velocity, Shallow Water, Simulation

Scientific paper

A rotating, two-zone, shallow-water laboratory simulation, designed to illustrate how spiral structure might be generated in galaxies whose rotation curve shows a jump in velocity, discloses anticyclonic, banana-shaped vortices at points of minimum surface density between successive spiral arms. Fluid particles trapped in these 'whorls' will enter and flow along the arms, achieving substantial radial velocities near the corotation circle (the rotation-curve discontinuity). This behavior, interpreted theoretically, provides new insight into the relative motion of the spiral arms and the gas in a galaxy disk. A self-consistent spiral/whorl structure emerges even if the peripheral zone rotates so fast that the Rossby-Obukhov radius is an order of magntitude shorter than the arms. The model results are compared with observations of NGC 1566. In some SB galaxies the bar phenomenon may be an artifact of spiral/whorl structure in the gaseous disk. If a rotating spiral galaxy interacts with a companion orbiting in the opposite direction, spiral arms can be produced which intrinsically lead: the pattern would rotate, tips forward, opposite to the rotation in the galaxy's interior.

Affiliated with

Also associated with

No associations

Rating

Interarm vortices predicted by laboratory simulation of spiral structure does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Interarm vortices predicted by laboratory simulation of spiral structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interarm vortices predicted by laboratory simulation of spiral structure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-894479