Location of the centers of Giant Anticyclons

Location of the centers of *Giant Anticyclons* relative to spiral arms,
as it depends on the sign of kappa^2 (square of the epicyclic frequency) and
on which force is predominant in the gaseous disk:
hydrodynamic pressure, self-gravity or external forces
Character of description of the gaseous disk	kappa^2>0	kappa^2<0
Hydrodynamics	In Spiral	Between spiral
Self-gravitation	Between spiral	In Spiral
Boundary of gravitational stability	Between spiral
External non-axially symmetric gravitational potential	Center of vortices may be shifted relative to density exterema	Center of vortices may be shifted relative to density exterema

References: Lyakhovich V.V., Fridman A.M., Khoruzhii O.V., Astronomy Reports, Vol.40, No.1,pp.18-28. Translation from Astronomicheskii Zhurnal, Vol.73, No.1,pp.24-35, 1996.