The rotation curve of the Galaxy to R = 16 kiloparsecs

Details The rotation curve of the Galaxy to R = 16 kiloparsecs The rotation curve of the Galaxy to R = 16 kiloparsecs

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...231l.115b&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 231, Aug. 1, 1979, p. L115-L119.

Astronomy and Astrophysics

Astrophysics

100

Galactic Rotation, Milky Way Galaxy, Carbon Monoxide, Error Analysis, H Ii Regions, Interstellar Gas

Scientific paper

The rotation curve of the Galaxy has been measured to a galactocentric distance of 16 kpc by using CO observations of molecular complexes related to H II regions in the second and third quadrants. There is no evidence for a turnover in the velocity to the last measured point, and from R = 12 kpc to R = 16 kpc, the rotation curve appears to rise by about 30 km/s. The mass of the Galaxy interior to 16 kpc is about 300 billion solar masses, a value comparable to, but greater than, that of M31. The velocity dispersion of the complexes from the mean rotation curve is 8 km/s.

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