Median statistics estimate of the galactic rotational velocity
Abstract
We compile a complete collection of 18 recent (from 2000 to 2017) measurements of Θ_{0}, the rotational velocity of the Milky Way at R_{0} (the radial distance of the Sun from the Galactic center). These measurements use tracers that are believed to more accurately reflect the systematic rotation of the Milky Way. Unlike other recent compilations of Θ_{0}, our collection includes only independent measurements. We find that these 18 measurements are distributed in a mildly nonGaussian fashion and a median statistics estimate indicates Θ_{0} = 220 ± 10 km s^{1} (2σ error) as the most reliable summary, at R_{0} = 8.0 ±0.3 kpc (2σ error).
 Publication:

Astrophysics and Space Science
 Pub Date:
 December 2018
 DOI:
 10.1007/s1050901834868
 arXiv:
 arXiv:1805.01917
 Bibcode:
 2018Ap&SS.363..268C
 Keywords:

 (Cosmology:) cosmological parameters;
 Galaxy: fundamental parameters;
 Galaxy: kinematics and dynamics;
 Galaxy: structure;
 Methods: data analysis;
 Methods: statistical;
 Astrophysics  Astrophysics of Galaxies;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Phenomenology;
 High Energy Physics  Theory
 EPrint:
 doi:10.1007/s1050901834868