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Article Contents

ABSTRACT

1.HISTORICAL INTRODUCTION

2.THE DATA
2.1.Halpha and Optical Measurements
2.2.HI line
2.3.CO Line
2.4.Maser Lines
2.5.Planetary Nebulae, Fabry-Perot, and Integral Field Spectrometers

3.MEASURING ROTATION VELOCITIES
3.1.Intensity-Weighted-Velocity Method
3.2.Centroid-Velocity and Peak-Intensity-Velocity Methods
3.3.Envelope-Tracing Method
3.4.Iteration Method
3.5.Absorption Line Velocities
3.6.Dependence on Observational Methods

4.CENTRAL ROTATION CURVES
4.1.High Resolution and Dynamic Range
4.2.The Milky Way Center
4.3.Rapidly Rotating Central Components and Massive Cores
4.4.Massive Black Holes and Circum-nuclear Rotation
4.5.Activity and Rotation Curves
4.6.Resonance Rings
4.7.Nuclear Warp
4.8.Nuclear Counterrotation
4.9.Non-circular Motion in Nuclear Molecular Bar

5.DISK ROTATION CURVES
5.1.Statistical Properties of Rotation Curves
5.2.Environmental Effects in Clusters
5.3.Lopsided Position-Velocity Diagrams
5.4.Counterrotating Disks and Other Kinematic Curiosities
5.5.Rotation of High Redshift Galaxies
5.6.Rotation Velocity as a Fundamental Parameter of Galaxy Dynamics and Evolution

6.HALO ROTATION CURVES AND DARK MATTER: A Brief Mention
6.1.Flat Rotation Curve in the Halo
6.2.Massive Dark Halo
6.3.The Extent of the Milky Way Halo
6.4.Declining Rotation Curves

7.GALAXY TYPES AND ROTATION CHARACTERISTICS
7.1.Sa, Sb, Sc Galaxies
7.2.Barred Galaxies
7.3.Low Surface Brightness Galaxies; Dwarf Galaxies
7.4.Large Magellanic Cloud
7.5.Irregular Galaxies: Interacting and Merging
7.6.Polar Ring Galaxies

8.THE FUTURE

REFERENCES