Recent advances in the determination of some Galactic constants in the Milky Way

Abstract

Here we statistically evaluate recent advances in determining the Sun-Galactic Center distance (Rsun) as well as recent measures of the orbital velocity around the Galactic Center (Vlsr), and the angular rotation parameters of various objects. Recent statistical results point to Rsun = 8.0 +- 0.2 kpc, Vlsr= 230 +- 3 km/s, and angular rotation at the Sun (ω) near 29 +- 1 km/s/kpc for the gas and stars at the Local Standard of Rest, and near 23 +- 2 km/s/kpc for the spiral pattern itself. This angular difference is similar to what had been predicted by density wave models, along with the observation that the galactic longitude of each spiral arm tracer (dust, cold CO) for each spiral arm becomes reversed across the Galactic Meridian (Vallee 2016b).

6 pages 4 figures, 2 tables

References in corpus (16)

• The mass distribution and gravitational potential of the Milky Way
• The Milky Way's circular velocity curve between 4 and 14 kpc from APOGEE data
• An Improved Distance and Mass Estimate for Sgr A* from a Multistar Orbit Analysis
• The old nuclear star cluster in the Milky Way: dynamics, mass, statistical parallax, and black hole mass
• Globular Cluster Streams as Galactic High-Precision Scales - The Poster Child Palomar 5
• Gas flow models in the Milky Way embedded bars
• Kinematic modelling of the Milky Way using the RAVE and GCS stellar surveys
• Clustering of Local Group distances: publication bias or correlated measurements? IV. The Galactic Center
• Staying away from the bar: the local dynamical signature of slow and fast bars in the Milky Way
• A new method for estimating the pattern speed of spiral structure in the Milky Way
• Analysis of Determinations of the Distance between the Sun and the Galactic Center
• On the Rotation Speed of the Milky Way Determined from HI Emission
• Detection of periodic variations in vertical velocities of Galactic masers
• Estimation of the SolarGalactocentric Distance and Rotation Velocity from Near-Solar-Circle Objects
• Galactic Kinematics from Data on Open Star Clusters from the MWSC Catalogue
• Vertical Distribution and Kinematics of Protoplanetary Nebulae in the Galaxy

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