25 citations · 46 across the 4 of their papers we have counts for
4 papers
Gravitational Loss-Cone Instability in Stellar Systems with Retrograde Orbit Precession
E. V. Polyachenko, V. L. Polyachenko, I. G. Shukhman
We study spherical and disk clusters in a near-Keplerian potential of galactic centers or massive black holes. In such a potential orbit precession is commonly retrograde, i.e. dir…
Formation Mechanisms for Spirals in Barred Galaxies
Evgenii V. Polyachenko, Valerij L. Polyachenko
We consider a scenario of formation of the spiral structure in barred galaxies. This scenario includes the new non-resonant mechanism of elongation of spirals, due to the character…
Gas motions in the plane of the spiral galaxy NGC 3631
A. M. Fridman, O. V. Khoruzhii, E. V. Polyachenko +7
The velocity field of the nearly face-on galaxy NGC 3631, derived from observations in the H alpha line and the HI radio line, is analysed to study perturbations related to the spi…
Giant Cyclones in Gaseous Discs of Spiral Galaxies
A. M. Fridman, O. V. Khoruzhii, E. V. Polyachenko +5
We report detection of giant cyclonic vortices in the gaseous disc of the spiral galaxy NGC 3631 in the reference frame rotating with the spiral pattern. A presence of such structu…