Rotation Curve and Mass Distribution in the Galactic Center --- From Black Hole to Entire Galaxy ---

Understand

Analyzing high-resolution longitude-velocity (LV) diagrams of the Galactic Center observed with the Nobeyama 45-m telescope in the CO and CS line emissions, we obtain a central rotation curve of the Milky Way.

• We combine it with the data for the outer disk, and construct a logarithmic rotation curve of the entire Galaxy.
• The new rotation curve covers a wide range of radius from r ~ 1 pc to several hundred kpc without a gap of data points.
• It links, for the first time, the kinematical characteristics of the Galaxy from the central black hole to the bulge, disk and dark halo.