13 citations · 34 across the 5 of their papers we have counts for
5 papers
Equilibrium models of radially anisotropic spherical stellar systems with softened central potentials
E. V. Polyachenko, V. L. Polyachenko, I. G. Shukhman
We study a new class of equilibrium two-parametric distribution functions of spherical stellar systems with radially anisotropic velocity distribution of stars. The models are less…
Notes on the stability threshold for radially anisotropic polytrope
E. V. Polyachenko, V. L. Polyachenko, I. G. Shukhman
We discuss some contradictions found in the literature concerning the problem of stability of collisionless spherical stellar systems which are the simplest anisotropic generalizat…
Effect of angular momentum distribution on gravitational loss-cone instability in stellar clusters around massive BH
Evgeny V. Polyachenko, Valery L. Polyachenko, Ilia G. Shukhman
Small perturbations in spherical and thin disk stellar clusters surrounding massive a black hole are studied. Due to the black hole, stars with sufficiently low angular momentum es…
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…