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

TL;DR

This paper introduces a practical method to determine the Galactic constants R_0 and V_0 using measurements of objects near the solar circle, improving upon previous techniques.

Contribution

It presents a modified solar-circle method that utilizes observational data to accurately estimate the Galactic constants R_0 and V_0.

Findings

Estimated R_0 as 7.54 +/- 0.77 kpc

Method improves accuracy of Galactic constant measurements

Applicable to existing observational data

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.