Astrophysics (index)about

rotation curve

(galaxy rotation curve)
(function of orbital speed to orbital radius for a galaxy)

A rotation curve (or galaxy rotation curve) is a function of the orbital speed of stars in a particular galaxy to their distance from the center of the galaxy. Rotation curves are of interest in that they do not show the pattern expected from Keplerian orbits based upon the mass observed in the galaxy's stars and clouds. This mismatch is a primary motivation for the concept of dark matter.

The rotation curve of the Milky Way is a factor in the concept of kinematic distance.


Referenced by:
Oort constants