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Article Contents

ABSTRACT

1.INTRODUCTORY REMARKS

2.HOW IS MORPHOLOGY RELEVANT TO SECULAR EVOLUTION?

3.HISTORICAL OVERVIEW

4.TUNING FORK CONTROVERSY

4.1.Does the continuity of galaxy morphology imply that secular evolution must be occurring?

5.Lecture 2: BARRED AND SPIRAL GALAXIES

5.1.Quantifying bar strength

5.2.Bar strength from maximum relative gravitational torques

5.3.Inner ring shapes and bar strength

5.4.Resonances in barred galaxies

5.5.Rings and pseudorings as tracers of the bar pattern speed

5.6.Are bars generally slightly skewed?

5.7.Secular evolution in barred galaxies

6.Lecture 3: THE INFRARED EXPERIENCE

6.1.Significant IR morphological surveys

6.2.The S⁴G bar fraction

6.3.Inferring stellar mass from S⁴G images

6.4.Secular evolution and the potential-density phase shift

6.5.Summary