Buch, Englisch, 350 Seiten
Buch, Englisch, 350 Seiten
ISBN: 978-1-394-25179-7
Verlag: Wiley John + Sons
Accessible and student-friendly textbook on the astrophysics of stars, now with new observational data and physical concepts
An Introduction to Stellar Astrophysics is a concise textbook containing core content on and detailed examples of stellar physics and stellar astronomy. This new edition is revised and expanded and contains updated and new sections on nearest and brightest stars, the dynamics of double stars, the classification of binary stars, Wolf Rayet stars, and stellar remnants such as white dwarfs.
The book is divided in seven chapters: basic concepts, stellar formation, radiative transfer in stars, stellar atmospheres, stellar interiors, nucleosynthesis and stellar evolution, and chemically peculiar stars and diffusion. Student-friendly features include detailed examples, exercises with selected solutions, brief recalls of the most important physical concepts, chapter summaries, and optional and advanced sections that can be skipped on first reading.
A large number of graphs and figures are included to better explain the concepts covered. Only essential astronomical data are given, and the amount of observational results shown is deliberately limited in scope.
An Introduction to Stellar Astrophysics includes information on: - The electromagnetic spectrum, blackbody radiation, luminosity, effective temperature, the Boltzmann and Saha equations, and the Hertzsprung-Russell diagram
- Hydrostatic equilibrium, the Virial theorem, the Jeans criteria, free-fall times, and pre-main-sequence evolution
- Radiative opacities, specific intensity and radiative moments, local thermodynamic equilibrium, and radiative transfer at large optical depths
- Energy transport in stars, polytropic models, advanced nuclear burning, and novae and supernovae
- Diffusion theory, radiative accelerations, and other transport processes
- New to this edition: sections on nearest and brightest stars, the dynamics of double stars, the classification of binary stars, Wolf Rayet stars and stellar remnants such as white dwarfs
Delivering intermediate knowledge on stars in a concise format, An Introduction to Stellar Astrophysics is an excellent textbook on the subject for advanced undergraduate and graduate students studying physics and astrophysics.
Autoren/Hrsg.
Fachgebiete
Weitere Infos & Material
Contents
Preface xi
Acknowledgments xiii
Chapter 1: Basic Concepts 1
1.1 Introduction 1
1.2 The Electromagnetic Spectrum 3
1.3 Blackbody Radiation 5
1.4 Luminosity, Effective Temperature, Flux and Magnitudes 8
1.5 Boltzmann and Saha Equations 13
1.6 Spectral Classification of Stars 21
1.7 The Hertzsprung–Russell Diagram 27
1.8 Nearest and Brightest Stars
1.9 Summary 30
1.10 Exercises 31
Chapter 2: Stellar Formation 35
2.1 Introduction 35
2.2 Hydrostatic Equilibrium 36
2.3 The Virial Theorem 40
2.4 The Jeans Criterion 46
2.5 Free-Fall Times† 52
2.6 Pre-Main-Sequence Evolution† 54
2.7 Summary 57
2.8 Exercises 57
Chapter 3: Radiative Transfer in Stars 61
3.1 Introduction 61
3.2 Radiative Opacities 62
3.2.1 Matter–Radiation Interactions 62
3.2.2 Types of Radiative Opacities 64
3.3 Specific Intensity and Radiative Moments 69
3.4 Radiative Transfer Equation 77
3.5 Local Thermodynamic Equilibrium 81
3.6 Solution of the Radiative-Transfer Equation 82
3.7 Radiative Equilibrium 90
3.8 Radiative Transfer at Large Optical Depths 91
3.9 Rosseland and Other Mean Opacities 94
3.10 Schwarzschild–Milne Equations†† 97
3.11 Demonstration of the Radiative-Transfer Equation† 99
3.12 Radiative Acceleration of Matter and Radiative Pressure† 100
3.12.1 Radiative Acceleration of Matter 100
3.12.2 Radiative Pressure 103
3.13 Summary 104
3.14 Exercises 105
Chapter 4: Stellar Atmospheres 109
4.1 Introduction 109
4.2 The Grey Atmosphere 110
4.2.1 The Temperature Profile in a Grey Atmosphere 111
4.2.2 Radiative Flux in a Grey Atmosphere†† 117
4.3 Line Opacities and Broadening 119
4.3.1 Natural Broadening 120
4.3.2 Doppler Broadening 122
4.3.3 Pressure Broadening 130
4.3.4 Stimulated Emission and Masers 132
4.3.5 Einstein Coefficients†† 134
4.4 Equivalent Width and Formation of Atomic Lines 137
4.4.1 Equivalent Width 137
4.4.2 Formation of Weak Atomic Lines 139
4.4.3 Curve of Growth† 142
4.5 Atmospheric Modelling 143
4.5.1 Input Data and Approximations 143
4.5.2 Algorithm for Atmospheric Modelling†† 145
4.5.3 Example of a Stellar Atmosphere Model 148
4.5.4 Temperature-Correction Procedure†† 150
4.6 Types of Binary Stars†
4.7 Summary 151
4.8 Exercises 152
Chapter 5: Stellar Interiors 155
5.1 Introduction 155
5.2 Equations of Stellar Structure 156
5.2.1 Hydrostatic Equilibrium Equation 156
5.2.2 Equation of Mass Conservation 156
5.2.3 Energy-Transport Equation 159
5.2.4 Equation of Energy Conservation 160
5.2.5 Other Ingredients Needed 161
5.3 Energy Transport in Stars 163
5.3.1 Monochromatic Radiative Flux in Stellar Interiors 164
5.3.2 Conduction 166
5.3.3 Convection 167
5.3.3.1 General Description of Convection 167
5.3.3.2 The Schwarzschild Criterion for Convection† 168
5.3.3.3 The Mixing-Length Theory†† 172
5.3.3.4 Convective Equilibrium† 176
5.4 Polytropic Models 176
5.5 Structure of the Sun 182
5.6 Equation of State 184
5.6.1 Introduction
