TY - JOUR

T1 - Simulations of slow bars in anisotropic disk systems

AU - Сотникова, Наталья Яковлевна

AU - Смирнов, Антон Александрович

AU - Кошкин, А. А.

PY - 2017

Y1 - 2017

N2 - The instability of anisotropic disk systems with elongated stellar orbits has been investigated. N-body generalized polytropic models of stellar disks have been constructed. They are shown to be unstable with respect to the bar formation at any degree of anisotropy. This result differs from the results of the studies of such models by other authors. The bar pattern speed and amplitude have been found. The initial distribution of precession rates and the adiabatic invariants of stellar orbits have been calculated. A bar is shown to be formed in such systems due to the radial orbit instability.

AB - The instability of anisotropic disk systems with elongated stellar orbits has been investigated. N-body generalized polytropic models of stellar disks have been constructed. They are shown to be unstable with respect to the bar formation at any degree of anisotropy. This result differs from the results of the studies of such models by other authors. The bar pattern speed and amplitude have been found. The initial distribution of precession rates and the adiabatic invariants of stellar orbits have been calculated. A bar is shown to be formed in such systems due to the radial orbit instability.

KW - galaxies, instability, stellar dynamics, simulations

U2 - 10.1134/S1063773717020062

DO - 10.1134/S1063773717020062

M3 - Article

VL - 43

SP - 61

EP - 74

JO - Astronomy Letters

JF - Astronomy Letters

SN - 1063-7737

ER -