6 papers · 1 filter
Early-Type Disk Galaxies: Structure and Kinematics
A. V. Zasov, A. V. Moiseev, A. V. Khoperskov +1
Spectroscopic observations of three lenticular (S0) galaxies (NGC 1167, NGC 4150, and NGC 6340) and one SBa galaxy (NGC 2273) have been taken with the 6-m telescope of the Special…
Disk-to-halo mass ratio evaluations based on the numerical models of collisionless disks
A. V. Zasov, A. V. Khoperskov, N. V. Tyurina
We propose that the lower bound of the stellar radial velocity dispersion c_r of an equilibrium stellar disk is determined by the gravitational stability condition. We compared the…
Bending instability in galaxies: the stellar disk thickness and the mass of spheroidal component
N. V. Tyurina, A. V. Khoperskov, D. V. Bizyaev
We present results of numerical N-body simulations of a galactic stellar disk embedded into a spherical dark halo. The non-linear dynamics of bending instabilities developing in th…
Minimum Velocity Dispersion in Stable Stellar Disks. Numerical Simulations
A. V. Khoperskov, A. V. Zasov, N. V. Tyurina
N-body dynamical simulations are used to analyze the conditions for the gravitational stability of a three-dimensional stellar disk in the gravitational field of two rigid spherica…
Stochastic spin evolution of neutron stars
S. B. Popov, M. E. Prokhorov, A. V. Khoperskov +1
In this paper we present calculations of period distribution for old accreting isolated neutron stars (INSs). At the age about a few billions years low velocity INSs come to the st…
The determination of mass of stellar disks of galaxies from the kinematic data
A. V. Zasov, A. V. Khoperskov, N. V. Tyurina
Different ways of the determination of masses of galactic disks, based on the kinematic data, are briefly discussed. The analysis of the rotation curves which reach maximum inside…