Three Models of the Gravitational Potential of the Milky Way

Abstract

The parameters of an axisymmetric model for the gravitational potential of the Galaxy have been refined. The basic curve of the Galaxy's rotation in a distance interval of $R:0-190$ kpc was constructed using the velocities of masers, classical Cepheids, Red Clump stars, Blue Horizontal Branch stars, halo stars, globular clusters, and dwarf satellite galaxies of the Milky Way. The rotation curve was selected in such a way that there would be no dominant burst of circular velocities in the central ($R<2$ kpc) region of the Galaxy. As a result, we constructed two two-component models of the galactic potential, which include contributions from the disk and the halo of invisible matter, as well as a three-component model with a small-mass bulge added in advance. These models can be useful in studying the long-term orbital evolution of stars and open and globular star clusters in the central ($R<4$ kpc) region of the Galaxy. The constructed models were tested for self-consistency by comparing their rotation curves with a set of model curves generated with the Illustris TNG50 software package.

23 pages, 5 figures, 3 tables

References in corpus (23)

• Gaia Data Release 3: Summary of the content and survey properties
• The mass distribution and gravitational potential of the Milky Way
• Trigonometric Parallaxes Of High-Mass Star Forming Regions: Our View Of The Milky Way
• Dynamical modelling of the Galactic bulge and bar: the Milky Way's bar pattern speed, stellar, and dark matter mass distribution
• Tango for three: Sagittarius, LMC, and the Milky Way
• Made-to-Measure models of the Galactic Box/Peanut bulge: stellar and total mass in the bulge region
• $S^5$: Probing the Milky Way and Magellanic Clouds potentials with the 6-D map of the Orphan-Chenab stream
• Detection of the Keplerian decline in the Milky Way rotation curve
• The Circular Velocity Curve of the Milky Way from 5 to 25 kpc using luminous red giant branch star
• Equilibrium models of the Milky Way mass are biased high by the LMC
• Gas Dynamics in the Galaxy: Total Mass Distribution and the Bar Pattern Speed
• The Rotation Curve, Mass Distribution and Dark Matter Content of the Milky Way from Classical Cepheids
• The incorrect rotation curve of the Milky Way
• A Study of the Effect of Bulges on Bar Formation in Disk galaxies
• Testing kinematic distances under a realistic Galactic potential
• A New Estimate of the Best Value for the Solar Galactocentric Distance
• A Bayesian estimation of the Milky Way's circular velocity curve using Gaia DR3
• Trigonometric Parallaxes of Four Star-forming Regions in the Distant Inner Galaxy
• Modeling of Spiral Structure in a Multi-Component Milky~Way-Like Galaxy
• On the Galactic rotation curve inferred from the Jeans equations Assessing its robustness using Gaia DR3 and cosmological simulations
• The parallax and 3D kinematics of water masers in the massive star-forming region G034.43+0.24
• The distance to the Serpens South Cluster from H2O masers
• 3-D kinematics of classical Cepheids according to Gaia, EDR3 catalog