Accuracy Diagrams for the Galactic Rotation Curve and Kinematical Distances

2011/04/30 by Yoshiaki Sofue
Earth and Planetary Sciences · Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Computational astrophysics #Galactic plane #Galaxy #Galaxy rotation curve #Geophysics and Gravity Measurements #Geophysics and Sensor Technology #Plane (geometry) #Rotation (mathematics) #astro-ph.GA

paper · pdf · doi:10.1093/pasj/63.4.813

9 pages, 12 figures, PASJ accepted

arxiv created 2011/07/03 · openalex publication_date 2011/08/25 · arxiv updated 2015/05/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We revisit methods used to determine the Galactic rotation curve and kinematical distances from radial velocities and proper motions. We construct ``accuracy diagrams'' to show the distributions in the galactic plane of expected uncertainties in the derived quantities, such as rotation velocities and kinematical distances. We discuss how to optimize the source selection for measurements of kinematical quantities based on accuracy diagrams.

Citations

• The outer rotation curve of the Milky Way
• TRIGONOMETRIC PARALLAXES OF MASSIVE STAR-FORMING REGIONS. VI. GALACTIC STRUCTURE, FUNDAMENTAL PARAMETERS, AND NONCIRCULAR MOTIONS
• Unified Rotation Curve of the Galaxy — Decomposition into de Vaucouleurs Bulge, Disk, Dark Halo, and the 9-kpc Rotation Dip —

Cited by

• Radial variations of the volume and surface star formation laws in the Galaxy