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Article Contents

ABSTRACT

1.INTRODUCTION

2.PHYSICAL CONDITIONS

3.PROBES OF PHYSICAL CONDITIONS

3.1.Tracers of Column Density, Size, and Mass

3.2.Probes of Temperature and Density

3.3.Kinematics

3.4.Magnetic Field and Ionization

3.5.Observational and Analytical Tools

4.FORMATION OF ISOLATED LOW-MASS STARS

4.1.Theoretical Issues

4.2.Globules and Cores: Overall Properties

4.3.Globules and Cores: Internal Conditions

4.4.Classification of Sources and Evolutionary Scenarios

4.5.Detailed Theories

4.6.Tests of Evolutionary Hypotheses and Theory

4.7.Collapse

4.8.Summary of Isolated Star Formation

5.CLUSTERED STAR FORMATION AND MASSIVE STARS

5.1.Theoretical Issues

5.2.Overall Cloud and Core Properties

5.3.Evolutionary Scenarios and Detailed Theories

5.4.Filaments, Clumps, Gradients, and Disks

5.5.Kinematics

5.6.Implications for Larger Scales

5.7.Summary of Clustered Star Formation

6.CONCLUSIONS AND FUTURE PROSPECTS

REFERENCES