Near-Solar-Circle Method for Determination of the Galactic Constants

Abstract

We propose a method to determine the galactic constants R_0 (distance to the Galactic Center) and V_0 (rotation velocity of the Sun) from measurements of distances, radial velocities and proper motions of objects near the solar circle. This is a modification of the solar-circle method to a more practical observational method. We apply the method to determine R_0 using data from the literature with known distances and radial velocities, and obtain R_0 = 7.54 +/- 0.77 kpc.

5 pages, 4 figures, accepted for PASJ (Vol. 63 No. 5)

References in corpus (3)

• Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
• Astrometry of Galactic Star-Forming Region ON2N with VERA: Estimation of the Galactic Constants
• Astrometry of Galactic Star-Forming Region Onsala 1 with VERA: Estimation of Angular Velocity of Galactic Rotation at Sun

Cited by in corpus (9)

• The Galaxy in Context: Structural, Kinematic and Integrated Properties
• Rotation Curve of the Milky Way out to $\sim$ 200 kpc
• Two estimates of the distance to the Galactic centre
• Systematic uncertainties from halo asphericity in dark matter searches
• The difficulty of measuring the local dark matter density
• The local standard of rest and the well in the velocity distribution
• Estimation of the SolarGalactocentric Distance and Rotation Velocity from Near-Solar-Circle Objects
• Measuring the Sun's Motion with Stellar Streams
• Estimation of the Galactocentric Distance of the Sun from Cepheids Close to the Solar Circle