The first structures in the universe: a theoretical study of their formation, evolution, and impact on subsequent structure formation
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
1999
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| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | München, Univ., Fak. für Physik, Diss., 2000 |
| Beschreibung: | V, 102 S. Ill., graph. Darst. |
Internformat
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| 245 | 1 | 0 | |a The first structures in the universe |b a theoretical study of their formation, evolution, and impact on subsequent structure formation |c von Thomas Georg Abel |
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Datensatz im Suchindex
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CONTENTS
ACKNOWLEDGMENTS. I
ZUSAMMENFASSUNG . II
SHORT SUMMARY. V
1 INTRODUCTION 1
2 FORMATION OF PRIMORDIAL MOLECULAR CLOUDS 5
2.1 ANALYTICAL CONSIDERATIONS FOR SMALL SCALE STRUCTURE COLLAPSE. 6
2.1.1 THE DENSITY AT COLLAPSE. 6
2.1.2 MOLECULAR CHEMISTRY AND COOLING. 7
2.2 THE SIMULATIONS. 8
2.3 RESULTS. 13
2.3.1 MORPHOLOGY. 13
2.3.2 PROFILE PLOTS. 16
2.3.3 EVOLUTION. 18
2.3.4 COMPARISON TO THE ANALYTIC MODEL. 21
2.4 DISCUSSION AND SUMMARY. 25
3 FRAGMENTATION OF PRIMORDIAL MOLECULAR CLOUDS 28
3.1 SIMULATIONS. 29
3.2 RESULTS. 30
3.2.1 MORPHOLOGY AND DYNAMICS . 30
3.2.2 FORMATION OF THE FIRST OBJECTS. 31
3.2.3 PROFILES. 33
3.3 DISCUSSION. 33
3.4 CONCLUSIONS. 34
4 FIRST STRUCTURE FORMATION WITH COSMIC STRINGS + HDM? 37
4.1 INTRODUCTION. 38
4.2 ANALYTICAL ARGUMENTS. 39
4.3 METHODS AND INITIALIZATION PARAMETERS .,.YY YY YY YY 42
4.4 WIGGLY STRINGS . 43
4.5 RESULTS. 44
4.6 CONCLUSION. 45
5 ON THE RADIATIVE FEEDBACK OF THE FIRST COSMOLOGICAL OBJECTS 47
5.1 INTERGALACTIC H
2 PHOTO-DISSOCIATION. 48
5.1.1 LEVEL DISTRIBUTION OF INTERGALACTIC H2. 48
5.1.2 RELEVANT LYMAN-WERNER BANDS. 49
5.1.3 COSMIC LINE TRANSFER. 51
5.1.4 RATECOEFFICIENTS. 55
5.1.5 DOES INTERGALACTIC H2 SIGNIFICANTLY MODULATE A SOFT UV
BACKGROUND?. 55
5.2 THE STRUCTURE OF COSMOLOGICAL H2 PHOTO-DISSOCIATION REGIONS. 56
BIBLIOGRAFISCHE INFORMATIONEN
HTTP://D-NB.INFO/961278684
5.3 THE INFLUENCE OF A SOFT UV BACKGROUND ON STRUCTURE FORMATION.
57
5.3.1 EQUILIBRIUM ARGUMENTS . 58
5.3.2 TIME DEPENDENT ANALYSIS. 58
5.3.3 COULD SELF-SHIELDING PLAY A ROLE?. 50
5.4 SUMMARY AND CONCLUSIONS. 52
6 LYMAN LIMIT ABSORPTION SYSTEMS AT HIGH REDSHIFTS 64
6.1 INTRODUCTION. 65
6.2 A NEW POPULATION OF LYMAN LIMIT SYSTEMS. 56
6.2.1 PHYSICAL PROPERTIES. 56
6.2.2 THE PREDICTED NUMBER DENSITY OF LLS. 59
6.3 DISCUSSION. 71
7 RADIATIVE TRANSFER EFFECTS DURING PHOTO-HEATING OF THE IGM 73
7.1 INTRODUCTION. 75
7.2 PHOTOHEATING. 75
7.2.1 OPTICAL THIN VS OPTICAL THICK.- YY
YY
YY 75
7.2.2 ENERGY INPUT DURING REIONIZATION. 76
7.2.3 PHOTOHEATING AFTER REONIZATION . 77
7.3 IMPLICATIONS. 79
7.3.1 TEMPERATURE OF THE IGM. 79
7.3.2 ABSORPTION PROPERTIES OF THE IGM. 80
7.3.3 BARYONS IN SHALLOW POTENTIAL WELLS. 80
7.4 CONCLUSIONS. 81
8 COSMOLOGICAL RADIATIVE TRANSFER IN THREE DIMENSIONS 82
8.1 INTRODUCTION. 83
8.2 COSMOLOGICAL RADIATIVE TRANSFER. 84
8.3 IMPLEMENTATION. 85
8.3.1 CHOOSING ANGLES. 86
8.3.2 CASTING RAYS. 87
8.3.3 COMPUTING RATES. 88
8.3.4 FASTER THAN LIGHT I-FRONTS . 89
8.4 APPLICATIONS. 89
8.4.1 SPHERICAL I-FRONT. 89
8.4.2 COSMOLOGICAL DENSITY FIELD. YY YY YY YY 90
8.5 SUMMARY. 92
8.6 ANOTHER MUCH FASTER METHOD?. 92
9 SUMMARY AND POSSIBLE FUTURE RESEARCH 94
9.1 FIRST STRUCTURE FORMATION. 95
9.2 EFFECTS OF RADIATIVE TRANSFER . 96
9.3 NUMERICAL COSMOLOGICAL RADIATION HYDRODYNAMICS . 97
REFERENCES
98 |
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| spelling | Abel, Thomas Georg 1970- Verfasser (DE-588)122830067 aut The first structures in the universe a theoretical study of their formation, evolution, and impact on subsequent structure formation von Thomas Georg Abel 1999 V, 102 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier München, Univ., Fak. für Physik, Diss., 2000 Hochschulschrift gtt Weltall (DE-588)4079154-3 gnd rswk-swf Strukturbildung (DE-588)4541700-3 gnd rswk-swf Vielkörperproblem (DE-588)4078900-7 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Weltall (DE-588)4079154-3 s Strukturbildung (DE-588)4541700-3 s Vielkörperproblem (DE-588)4078900-7 s DE-604 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=009339631&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Abel, Thomas Georg 1970- The first structures in the universe a theoretical study of their formation, evolution, and impact on subsequent structure formation Hochschulschrift gtt Weltall (DE-588)4079154-3 gnd Strukturbildung (DE-588)4541700-3 gnd Vielkörperproblem (DE-588)4078900-7 gnd |
| subject_GND | (DE-588)4079154-3 (DE-588)4541700-3 (DE-588)4078900-7 (DE-588)4113937-9 |
| title | The first structures in the universe a theoretical study of their formation, evolution, and impact on subsequent structure formation |
| title_auth | The first structures in the universe a theoretical study of their formation, evolution, and impact on subsequent structure formation |
| title_exact_search | The first structures in the universe a theoretical study of their formation, evolution, and impact on subsequent structure formation |
| title_full | The first structures in the universe a theoretical study of their formation, evolution, and impact on subsequent structure formation von Thomas Georg Abel |
| title_fullStr | The first structures in the universe a theoretical study of their formation, evolution, and impact on subsequent structure formation von Thomas Georg Abel |
| title_full_unstemmed | The first structures in the universe a theoretical study of their formation, evolution, and impact on subsequent structure formation von Thomas Georg Abel |
| title_short | The first structures in the universe |
| title_sort | the first structures in the universe a theoretical study of their formation evolution and impact on subsequent structure formation |
| title_sub | a theoretical study of their formation, evolution, and impact on subsequent structure formation |
| topic | Hochschulschrift gtt Weltall (DE-588)4079154-3 gnd Strukturbildung (DE-588)4541700-3 gnd Vielkörperproblem (DE-588)4078900-7 gnd |
| topic_facet | Hochschulschrift Weltall Strukturbildung Vielkörperproblem |
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