Published in "Galactic and Extragalactic Radio Astronomy", 1974, eds. G.L. Verschuur and K.I. Kellerman.

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Chapter 11

MAPPING NEUTRAL HYDROGEN IN EXTERNAL GALAXIES

Melvyn C. H. Wright


Table of Contents

INTRODUCTION
Hydrogen Distribution and Kinematics
Classification Systems

INTEGRAL PROPERTIES OF GALAXIES
The Data
Correlations

MAPPING HI IN GALAXIES
Density Distribution
Velocity Distribution

OBSERVATIONS WITH A SINGLE DISH
Observing Procedure
Magellanic Clouds
Nearby Spiral Galaxies
Galaxies with Smaller Angular Diameters
Model Fitting

INTERFEROMETRIC OBSERVATIONS
Position Profiles
Observations of External Galaxies
Interpretation of the Data

APERTURE SYNTHESIS OBSERVATIONS
Observational Requirements
Correlation Receivers
Data Reduction

HIGH-RESOLUTION MAPS
Observations of M33 with the Cambridge Half-Mile Telescope
Observations at the Owens Valley Radio Observatory
Comparison of the HI Distributions of Late-Type Galaxies
Central Hydrogen Depressions
Rate of Star Formation

CONCLUSIONS

REFERENCES

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