An introduction to star formation:
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Cambridge
Cambridge University Press
2015
|
| Ausgabe: | First paperback edition |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis Klappentext |
| Beschreibung: | XX, 208 Seiten Illustrationen |
| ISBN: | 9781107483521 1107483522 9780521630306 |
Internformat
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Datensatz im Suchindex
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|---|---|
| adam_text | Contents
A
List of illustrations page xi
Preface xix
1 Introduction 1
1.1 About this book 1
1.2 The stellar life-cycle 2
13 The space between the stars 3
1.4 The distribution of the stars 6
1.5 The magnetic field 8
1.6 Star formation in a galactic context 10
1.7 Known sites of contemporary star formation 12
1.8 The initial mass function 15
1.9 Objectives of star-formation theory 16
2 Probing star formation 21
2.1 Introduction 21
2.2 Properties of photons 21
23 Intensity 22
2.4 Flux 24
2.5 Radiant energy density 24
2.6 Continuum radiation - studying the dust 25
2.7 Radiative transfer 27
2.8 Calculating the dust mass 29
2.9 Line radiation - studying the gas 32
3 The ISM - the beginnings of star formation 39
3.1 Introduction 39
3.2 The 21 -cm line of atomic hydrogen 39
3.3 Molecular gas 48
3.4 Line shapes and the motion of the gas 52
3.5 Absorption lines - searchlights through the ISM 56
3.6 The curve of growth 61
3.7 The use of absorption lines 63
vii
vïiî Contents
4 Molecular clouds - the sites of star formation 65
4.1 The equation of state 65
4.2 Fluid mechanics of molecular clouds 66
4.3 Gravitational instability 69
4.4 The virial theorem 72
4.5 Observations of molecular clouds 75
4.6 Turbulence in molecular clouds 78
4.7 Magnetic fields in molecular clouds 83
4.8 Chemistry in molecular clouds 87
5 Fragmentation and collapse - the road to star
formation 95
5.1 The road to star formation 95
5.2 Theoretical collapse solutions 96
5.3 The minimum mass of a star 98
5.4 Effects of the magnetic field 102
5.5 Observations of the initial conditions of collapse 108
5.6 Pre-stellar cores and the IMF 111
5.7 Binary and multiple star formation 11 3
6 Young stars, protostars and accretion - building a
typical star 117
6.1 Pre-main-sequence evolution 117
6.2 Hayashi tracks 119
6.3 Henyey tracks 125
6.4 Accretion onto protostars 128
6.5 Observations of protostars - the birth line 1 35
6.6 Millimetre-wave continuum observations 1 36
6.7 Millimetre-wave spectroscopy 138
6.8 Infrared and optical observations 1 39
7 The formation of high-mass stars, and their
surroundings 143
7.1 Introduction 143
7.2 The main stages of high-mass star formation 144
7.3 Building a high-mass star 149
7.4 Line radiation from Hll regions 153
7.5 Recombination rate and emission measure 156
7.6 Free-free radio continuum emission 158
7.7 Size of an Hll region - Stromgren radius 161
7.8 Ionisation fronts 162
7.9 Expansion of an Hll region 166
Contents ix
8 By-products and consequences of star formation 173
8.1 Introduction 173
8.2 Circumstellar discs 173
8.3 Bipolar outflows 175
8.4 Disc fragmentation 179
8.5 Planet formation 180
8.6 Brown dwarf stars 184
8.7 Galaxy formation 187
8.8 Starburst galaxies 190
8.9 The epoch of star formation 191
List of mathematical symbols 195
List of figure credits 201
Index 205
An Introduction to Star Formation
Guiding the reader through all the stages that lead to the formation of a star such as our Sun, this textbook aims to provide students with a complete overview of star formation. It examines the underlying physical processes that govern the evolution from a molecular cloud core to a main-sequence star, and focuses on the formation of solar-mass stars. Each chapter combines theory and observation, helping readers to connect with, and understand, the theory behind star formation. Beginning with an explanation of the interstellar medium and molecular clouds as sites of star formation, subsequent chapters address the building of typical stars and the formation of high-mass stars, concluding with a discussion of the by-products and consequences of star formation. This is a unique, self-contained text with sufficient background information for self-study, and is ideal for students and professional researchers alike.
derek ward-thompson is Deputy Head of the School of Physics and Astronomy at Cardiff University. An observer in the field of molecular clouds and protostars, Professor Ward-Thompson’s research interests lie in observing the formation of stars and planets, particularly the very earliest stages of star formation.
anthony whitworth is a Professor in the School of Physics and Astronomy at Cardiff University. Professor Whitworth’s main area of research lies in the theoretical modelling of the formation of stars and brown dwarfs.
This book is based on lectures given by the authors, at Cardiff University and elsewhere, on star formation.
|
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| isbn | 9781107483521 1107483522 9780521630306 |
| language | English |
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| spelling | Ward-Thompson, Derek 1962- Verfasser (DE-588)1017474001 aut An introduction to star formation Derek Ward-Thompson, Anthony P. Whitworth First paperback edition Cambridge Cambridge University Press 2015 XX, 208 Seiten Illustrationen txt rdacontent n rdamedia nc rdacarrier 524.3 Sternentstehung (DE-588)4057364-3 gnd rswk-swf Sternentstehung (DE-588)4057364-3 s DE-604 Whitworth, Anthony P. Verfasser (DE-588)143597922 aut Digitalisierung UB Bayreuth - ADAM Catalogue Enrichment application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=028193554&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis Digitalisierung UB Bayreuth - ADAM Catalogue Enrichment application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=028193554&sequence=000002&line_number=0002&func_code=DB_RECORDS&service_type=MEDIA Klappentext |
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| title | An introduction to star formation |
| title_auth | An introduction to star formation |
| title_exact_search | An introduction to star formation |
| title_full | An introduction to star formation Derek Ward-Thompson, Anthony P. Whitworth |
| title_fullStr | An introduction to star formation Derek Ward-Thompson, Anthony P. Whitworth |
| title_full_unstemmed | An introduction to star formation Derek Ward-Thompson, Anthony P. Whitworth |
| title_short | An introduction to star formation |
| title_sort | an introduction to star formation |
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