Stellar Spectral Classification

Preface xi Important Note on Terminology and Units xv Chapter 1. The History and Philosophy of Stellar Spectral Classification 1 1.1 Early History 1 1.2 Later Developments 10 1.3 The MK Process 17 Chapter 2. An Overview of the Normal Stars 32 2.1 Introduction 32 2.2 The Spectral Sequence 32 2.3 Multicolor Photometry and Stellar Classification 44 2.4 Physical Principles Underlying the MK Sequence 50 Chapter 3. The OB Stars--Nolan R. Walborn 66 3.1 Introduction 66 3.2 The Optical 66 3.3 The Ultraviolet 75 3.4 The Infrared--Margaret M. Hanson 81 3.5 Peculiar Categories 89 3.6 X-Ray Line Spectra 102 3.7 Calibration and Astrophysical Modeling 105 Chapter 4. The B-type Stars 115 4.1 Introduction 115 4.2 Optical Classification 115 4.3 The Ultraviolet 120 4.4 Chemically Peculiar B-type Stars 123 4.5 Be Stars and B Shell Stars 135 4.6 Other B-type Emission-line Stars 143 4.7 B-type Stars in Advanced Evolutionary States 147 Chapter 5. The A-type Stars 160 5.1 Introduction 160 5.2 Optical Spectral-type Criteria 160 5.3 Ultraviolet and Infrared Classification Schemes 169 5.4 Chemically Peculiar Stars 176 5.5 Herbig Ae/Be Stars 200 5.6 A-type Stars in Advanced Evolutionary Stages 207 5.7 A-type Shell Stars 213 Chapter 6. The F-type Stars 221 6.1 Introduction 221 6.2 Optical Classification 221 6.3 Classification in the Ultraviolet and Infrared 227 6.4 Population II F-type Stars 236 6.5 Chemically Peculiar F-type Stars 244 6.6 F-type Stars in Advanced Evolutionary Stages 249 Chapter 7. The G- and K-type Stars 259 7.1 Introduction 259 7.2 Optical Classification 259 7.3 The Infrared 265 7.4 The Search for a Solar Twin; Chromospheric Activity 270 7.5 T Tauri Stars 275 7.6 Chemically Peculiar G- and K-giants 278 7.7 Population II and III Stars 281 7.8 The High Luminosity, Yellow Variables 283 Chapter 8. The M-type, S-type, and Carbon Stars 293 8.1 Introduction 293 8.2 The M-type Stars 293 8.3 The Carbon Stars 306 8.4 The S-type Stars 321 8.5 Symbiotic and Algol Stars

Richard O. Gray is professor of astronomy at Appalachian State University. Christopher J. Corbally, SJ, is a vice director of the Vatican Observatory and adjunct associate professor of astronomy at the University of Arizona.

"Anyone interested in learning about the classification of stellar spectra will be well served if they begin by consulting a new book entitled Stellar Spectral Classification. Beautiful illustrations and examples are given at every turn... We can confidently say that this is not only a superb text but is probably the most comprehensive single-volume text currently available on the fascinating subject of stellar spectral classification. A valuable resource for the astronomical community, it exudes authority. This is no surprise for the book's authors and contributors are amongst foremost authorities in this field. Summing up, we can say that our first look at this book made us really excited."--Current Engineering Practice