astro-ph/0406143

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DENSITY-WAVE SPIRAL THEORIES IN THE 1960s. II.

I. I. Pasha 1


Sternberg State Astronomical Institute, Moscow
Vavilov Institute for History of Science and Technology, Moscow


Table of Contents

Introduction

I. ORIGINS OF SWING AMPLIFICATION
Cambridge union
Swing amplification
Spiral regeneration, take two
Transient growth and asymptotic stability
Spiral stellar wakes
The roads part

II. THE LIN-SHU THEORY GOES ON
Neutral modes and marginally stable disk
Antispiral theorem
Spiral shock waves and induced star formation
Extremely satisfactory comparisons?

III. SHARPER FOCUS
A feel of group velocity
Group properties of tightly wrapped packets
Sources of spiral waves

IV. GATHERING IN BASEL
Astronomers' applause
Distinct cautions

AFTERWORD

REFERENCES



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