On the possibility of determining the distance to the Galactic center from the geometry of spiral arm segments

I. I. Nikiforov; A. V. Veselova

doi:10.1515/astro-2017-0240

paper

On the possibility of determining the distance to the Galactic center from the geometry of spiral arm segments

arXiv:1604.05233 · doi:10.1515/astro-2017-0240

Abstract

A new approach to determining the solar galactocentric distance, $R_{0}$ , from the geometry of spiral-arm segments is proposed. Geometric aspects of the problem are analyzed and a simplified three-point method for estimating $R_{0}$ from objects in a spiral segment is developed in order to test the proposed approach. An estimate of $R_{0} = 8.44 \pm 0.45$ kpc is obtained by applying the method to masers with measured trigonometric parallaxes, and statistical properties of the $R_{0}$ estimation from spiral segments are analyzed.

8 pages, 7 figures. Published in Baltic Astronomy (BA)

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