A dynamical model of the Galaxy

  title={A dynamical model of the Galaxy},
  author={Alexander V. Khoperskov and N. V. Tyurina},
  journal={Astronomy Reports},
A series of dynamical models of the Galaxy is constructed assuming that the entire disk is near the gravitational-stability limit. This imposes constraints on the dynamical and kinematic parameters of the main subsystems (the disk, bulge, and halo). The disk surface density in the solar neighborhood should not exceed 58 M⊙/pc2. Further, we find that the observed local decrease in the rotational velocity at 6 kpc ≲ r ≲ 10 kpc is not associated with details of the radial distribution of matter in… 
Numerical modelling of the vertical structure and dark halo parameters in disc galaxies
The non-linear dynamics of bending instability and vertical structure of a galactic stellar disc embedded into a spherical halo are studied with N-body numerical modelling. Development of the bending
Modeling of Spiral Structure in a Multi-Component Milky~Way-Like Galaxy
The maximum value in the rotation curve of the disk of the Milky Way galaxy, as found in its central regions, is explained by non-circular motion due to the presence of a bar and its orientation relative to an observer.
Galactic masers: Kinematics, spiral structure and the disk dynamic state
We applied the currently most comprehensive version of the statistical-parallax technique to derive the kinematical parameters of the maser sample with 136 sources. Our kinematic model comprises the
Dynamics of gaseous disks in a non-axisymmetric dark halo
The dynamics of a galactic disk in a non-axisymmetric (triaxial) dark halo is studied in detail using high-resolution, numerical, hydrodynamical models. A long-lived, two-armed spiral pattern is
The simulation of molecular clouds formation in the Milky Way
Using 3D hydrodynamic calculations we simulate formation of molecular clouds in the Galaxy. The simulations take into account molecular hydrogen chemical kinetics, cooling and heating processes.
Modeling stellar-gaseous disks: rows in spiral patterns of galaxies
The work is aimed at studying the formation mechanisms of straightened segments (rows) in spiral galactic arms, which are found in approximately 5% of S-galaxies. We use the Smoothed Particles
Dark matter in galaxies
Dark matter in galaxies, its abundance, and its distribution remain a subject of long-standing discussion, especially in view of the fact that neither dark matter particles nor dark matter bodies
Galactic chemical evolution: stellar yields and the initial mass function
We present a set of 144 galactic chemical evolution models applied to a Milky Way analogue, computed using four sets of low+intermediate star nucleosynthetic yields, six massive sta r yield


Estimating the masses of the spherical and disk components of galaxies via numerical simulations
A series of numerical N-body simulations is performed in order to dynamically model the properties of four galaxies (NGC 5603, NGC 3198, NGC 891, and NGC 1566) with known rotation curves, radial disk
A realistic model of the galaxy
A three-component mass model of the Galaxy consisting of a modified exponential disk, a spherical inner bulge and a massive outer corona has been derived that attempts to give a valid description of
A COBE Model of the Galactic Bar and Disk
A model of the bar and old stellar disk of the Galaxy has been derived from the survey of the Diffuse Infrared Background Experiment (DIRBE) of the Cosmic Background Explorer at wavelengths of 1.25,
The evolution of stellar exponential discs
Models of disc galaxies which invoke viscosity-driven radial flows have long been known to provide a natural explanation for the origin of stellar exponential discs, under the assumption that the
The Most Completely Sampled Rotation Curves for Galaxies
We have compiled high-resolution position-velocity diagrams observed along the major axes of nearby spiral galaxies in the CO-line emission, and derived rotation curves for the inner regions of the
The photometric structure of the inner Galaxy
The light distribution in the inner few kiloparsecs of the Milky Way is recovered non­ parametrically from a dust-corrected near-infrared COBEIDIRBE surface brightness map of the inner Galaxy. The
COBE's Galactic Bar and Disk
A model of the bar and old stellar disk of the Galaxy has been derived from the survey of the Diffuse Infrared Background Experiment (DIRBE) of the Cosmic Background Explorer at wavelengths of 1.25,
The galactic disk surface mass density and the Galactic force K(z) at z = 1. 1 kiloparsecs
A set of distance and velocity data previously obtained and analyzed is rediscussed to determine the surface mass density of the Galactic disk. These data reliably determine the integral surface mass
Kinematics and Chemical Properties of the Old Disk of the Galaxy
Late type spiral galaxies such as the Milky Way have two major luminous components, the disk and the bulge. In this paper, we discuss the kinematics and chemical properties of the disk component of
The Properties of the Galactic Bar Implied by Gas Kinematics in the Inner Milky Way
Longitude-velocity (l-V) diagrams of H I and CO gas in the inner Milky Way have long been known to be inconsistent with circular motion in an axisymmetric potential. Several lines of evidence suggest