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Rotation curves of high-luminosity spiral galaxies and the rotation curve of our galaxy

Published online by Cambridge University Press:  14 August 2015

Vera C. Rubin
Vera C. Rubin*
Affiliation:
Department of Terrestrial Magnetism Carnegie Institution of Washington

Abstract

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Rotation curves of high luminosity spiral galaxies are flat, to distances as great as r=49 kpc. This implies a significant mass at large r. Rotational velocities increase about 20 km/s across a spiral arm, as predicted by the density wave theory. By analogy, it is suggested that our Galaxy has a flat rotation curve out to r∼60 kpc, with V ∼ constant at near the solar rotational velocity, and m ∼7×1011 m⊙. Values of A and B imply that the sun is not located in a spiral arm.

Type
IV. GALACTIC KINEMATICS AND DISTANCES
Information
Symposium - International Astronomical Union , Volume 84: The Large-Scale Characteristics of the Galaxy , 1979 , pp. 211 - 220
Copyright
Copyright © Reidel 1979 

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