Median Statistics Estimate of the Galactic Rotational Velocity

Abstract

We compile a complete collection of 19 recent (since 2000) measurements of ${\Theta }_0$, 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 ${\Theta }_0$, our collection includes only independent measurements. We find that these 19 measurements are distributed in a mildly non-Gaussian fashion and a median statistics estimate indicates ${\Theta }_0=220\pm 10$ km\,s${}^{-1}$ (2$\sigma$ error) as the most reliable summary, at $R_0=8.0\pm 0.3$ kpc (2$\sigma$ error).

References in corpus (41)

• The mass distribution and gravitational potential of the Milky Way
• Detection of the gravitational redshift in the orbit of the star S2 near the Galactic centre massive black hole
• The Proper Motion of Sgr A*: II. The Mass of Sgr A*
• The Milky Way's Circular Velocity Curve to 60 kpc and an Estimate of the Dark Matter Halo Mass from Kinematics of ~2400 SDSS Blue Horizontal Branch Stars
• Planck 2015 results. XVII. Constraints on primordial non-Gaussianity
• A direct dynamical measurement of the Milky Way's disk surface density profile, disk scale length, and dark matter profile at 4 kpc < R < 9 kpc
• Constraining the Milky Way potential with a 6-D phase-space map of the GD-1 stellar stream
• Dynamical modelling of the Galactic bulge and bar: the Milky Way's bar pattern speed, stellar, and dark matter mass distribution
• Hubble parameter measurement constraints on the redshift of the deceleration-acceleration transition, dynamical dark energy, and space curvature
• Galaxia: a code to generate a synthetic survey of the Milky Way
• Median Statistics, H_0, and the Accelerating Universe
• The Milky Way's rotation curve out to 100 kpc and its constraint on the Galactic mass distribution
• Globular Cluster Streams as Galactic High-Precision Scales - The Poster Child Palomar 5
• Median statistics and the Hubble constant
• Non-Gaussian Error Distribution of Hubble Constant Measurements
• Planck 2015 constraints on the non-flat $\Lambda$CDM inflation model
• Binned Cosmic Microwave Background Anisotropy Power Spectra: Peak Location
• Binned Hubble parameter measurements and the cosmological deceleration-acceleration transition
• HST Astrometry of M4 and the Galactic Constant V_0/R_0
• Galactic masers: kinematics, spiral structure and the disk dynamic state
• Hubble parameter data constraints on dark energy
• Recent advances in the determination of some Galactic constants in the Milky Way
• The Surface Density Profile of the Galactic Disk from the Terminal Velocity Curve
• Gaussianity of Degree-Scale Cosmic Microwave Background Anisotropy Observations
• Origin of the high v_los feature in the Galactic bar
• Not Normal: the uncertainties of scientific measurements
• Median Statistics Estimate of the Distance to the Galactic Center
• The Galactic Inner Halo: Searching for White Dwarfs and Measuring the Fundamental Galactic Constant, Vo/Ro
• The rate of stellar encounters along a migrating orbit of the Sun
• Extension of the C star rotation curve of the Milky Way to 24 kpc
• Clustering of Local Group distances: publication bias or correlated measurements? V. Galactic rotation constants
• Non-Gaussian Error Distributions of LMC Distance Moduli Measurements
• Kinematic Analysis of Solar-Neighborhood Stars Based on RAVE4 Data
• Determination of the Galactic Rotation Curve from OB Stars
• Non-Gaussian Error Distribution of ${}^7\mathrm{Li}$ Abundance Measurements
• The Galaxy Kinematics from OB Stars with Proper Motions from the Gaia DR1 Catalog
• Kinematics of the Galaxy from Cepheids with proper motions from the Gaia DR1 catalogue
• The Gaia-ESO Survey: Separating disk chemical substructures with cluster models
• Galactic Kinematics from Data on Open Star Clusters from the MWSC Catalogue
• Non-Gaussian Error Distributions of Galactic Rotation Speed Measurements
• Orientation Parameters of the Cepheid System in the Galaxy

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• Dynamical effects in the observed rate of change of the orbital and the spin periods of radio pulsars: Improvement in the method of estimation and its implications
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• The stability of galaxies in an expanding universe obtained by Newtonian dynamics
• Rotation of galaxies and dark matter