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| Historical Introduction. Star Formation: the Early History | |
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| Pre-Main-Sequence Evolution of Stars and Young Clusters | |
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| Initial Conditions of Pre-Main-Sequence Evolution | |
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| The Classical Theory of Pre-Main-Sequence Evolution | |
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| Basic Results | |
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| The Impact of Star Formation | |
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| Protostellar Collapse: the Mass Accretion Rate | |
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| Classical Collapse Models | |
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| More Realistic Models | |
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| Protostellar Evolution | |
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| Central D-Burning | |
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| Radiative Barrier | |
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| The Onset of D-Shell Burning and Gravitational Contraction | |
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| The Stellar Birthline | |
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| Effects of the Accretion Flow | |
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| Pre-Main-Sequence Evolution | |
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| Evolutionary Models | |
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| Protostellar Initial Conditions | |
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| Stellar Structure Equations | |
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| Equation of State | |
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| Opacity | |
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| Treatment of Convection | |
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| Nuclear Reactions | |
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| The H-R Diagram | |
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| Low-Mass Stars: 0.1 <$$> | |
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| Intermediate-Mass Stars: 2 <$$> | |
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| Massive Stars: <$$> | |
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| Tests to PMS Evolutionary Diagrams | |
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| Comparison of Tracks | |
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| The Low-Mass M Dwarfs and the End of the Main Sequence | |
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| Derivation of Observable Quantities from Evolutionary Tracks | |
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| Pre-Main-Sequence Binaries | |
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| Physical Processes in PMS Stars | |
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| Lithium Depletion in Young Stars | |
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| Rotation and Depletion | |
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| Spectroscopic Classification Based on Lithium | |
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| Lithium and Brown Dwarfs | |
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| Mass Accretion in Young Stars | |
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| Disk Accretion | |
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| Effects on Evolutionary Tracks | |
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| Rotation and PMS Evolution | |
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| Rotational Properties of Young Stars | |
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| Structural Effects | |
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| Pulsational Instabilities in PMS Stars | |
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| The Input Models | |
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| The Instability Strip | |
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| PMS Evolution of Clusters and Associations | |
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| High Mass Star Formation | |
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| The Search for Massive Protostars | |
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| The Evolution of Ultracompact Hll Regions | |
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| Clustering of Young Stars | |
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| Clustering and Mass Segregation | |
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| Effects on the Environment | |
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| Clustering and Binary Formation | |
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| Clustering and Star Formation Efficiency | |
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| Clustering and the IMF | |
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| Stellar Populations in Clusters and Associations | |
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| H-R Diagrams | |
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| Star Formation Histories | |
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| The Post-T Tauri Problem | |
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| Observations of Young Stellar Objects (YSO) | |
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| Introduction | |
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| How to Find Young Stars and Protostars | |
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| Disks, Jets and Protostars | |
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| A VLT/ISAAC Study of Circumstellar Disks and Envelopes Around YSOs | |
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| Abstract | |
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| Scientific Rationale | |
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| Immediate Objective | |
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| Telescope Justification | |
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| Results | |
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| Infrared H(2) Imaging of the Highly Symmetric Proto-stellar Jets HH212 and HH111 | |
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| Abstract | |
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| Scientific Background: Star Formation and Herbig-Haro Jets | |
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| Scientific Goals | |
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| The Need for HST | |
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| Results | |
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| An Unbiased mm Continuum Survey for Protostellar Outflow Sources in the Orion A Cloud | |
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| Abstract | |
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| The Need for an Unbiased Millimetre Survey for Protostellar Outflow Sources | |
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| Framework: A Survey for Jets and Protostars in L1641 | |
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| Technical Details | |
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| Results | |
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| Mid-Infrared Imaging of Deeply Embedded Protostellar Sources in the Orion A Cloud | |
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| Abstract | |
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| Scientific Justification | |
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| Why Do We Need Mid-Infrared Observations at Keck? | |
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| Technical Remarks | |
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| Results | |
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| A Study of Faint Disks Around X-ray Selected Young Low-Mass Stars in an OB Association | |
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| Abstract | |
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| Description of the Proposed Programme | |
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| Results | |
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| Young Binaries | |
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| Statistics of Young Binary Stars: Implications for (Binary) Star Formation | |
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| Young Binary Stars: Why Care? | |
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| Observational Methods | |
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| Results | |
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| Implications | |
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| Future Prospects | |
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| Discussion | |
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| Low-Mass Binary Companions to Intermediate-Mass Stars in the Sco-Cen OB Association | |
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| Abstract | |
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| Description of the Proposed Programme | |
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| Results | |
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| Multiplicity of Massive Stars in the Orion Nebula Cluster and Implications on Their Formation Mechanism | |
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| Abstract | |
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| Introduction | |
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| Observations | |
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| Results | |
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| Conclusions | |
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| Low Mass Stellar Content of Young Star Clusters and Associations | |
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| The Low-Mass Initial Mass Function in the Upper Scorpius OB Association | |
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| Abstract | |
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| Scientific Justification | |
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| Results | |
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| The Full Population of T Tauri Stars of the Young Stellar Cluster IC 348 | |
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| Abstract | |
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| Scientific Justification | |
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| Technical Feasibility | |
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| Results | |
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| A Study of the Low-Mass Stellar Population in the Galactic Starburst Region NGC 3603 | |
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| Abstract | |
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| Description of the Proposed Programme | |
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| Required Observing Time | |
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| Results | |
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| The Low-Mass Pre-MS Stellar Content of the 30 Dor Starburst Cluster | |
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| Abstract | |
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| Scientific Background | |
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| Previous Work | |
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| Summary of the Scientific Goals and Method | |
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| The Need for NICMOS/HST | |
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| Description of the Observations | |
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| Results | |
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| Appendix: The Suite of Large Ground-Based Telescopes | |
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| Subject Index | |