Early stages of massive star formation:
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| Format: | Book |
| Language: | English German |
| Published: |
2002
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| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Item Description: | Bonn, Univ., Diss., 2002. - Enth. Zsfassung in engl. und dt. Sprache |
| Physical Description: | IX, 151 S. Ill., graph. Darst. |
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| adam_text |
CONTENTS
ZUSAMMENFASSUNG - ABSTRACT IN GERMAN III
ABSTRACT V
1 INTRODUCTION 1
1.1 THE QUEST FOR MASSIVE STARS . 1
1.1.1 LOW-MASS STAR FORMATION. 1
1.1.2 HIGH-MASS STAR FORMATION. 2
1.1.3 APPROACH AND OUTLINE OF THIS THESIS. 3
1.2 THE SAMPLE. 4
2 STATISTICAL PROPERTIES OF THE SAMPLE 9
2.1 ARCHIVAL DATA. 9
2.1.1 THE IRAS-HIRES DATABASE . 9
2.1.2 THE MIDCOURSE SPACE EXPERIMENT POINT SOURCE CATALOG. 11
2.2 NEW OBSERVATIONS. 12
2.2.1 1.2 MM DUST CONTINUUM EMISSION. 12
2.2.2 3.6 CM CONTINUUM EMISSION. 12
2.2.3 SPECTRAL LINE OBSERVATIONS . 13
2.3 DISCUSSION. 17
2.3.1 SOURCE MULTIPLICITY. 17
2.3.2 MASS-LUMINOSITY RELATION. 18
2.3.3 BOLOMETRIC VERSUS CM LUMINOSITIES. 20
2.3.4 ACCRETION LUMINOSITY. 21
2.4 CONCLUSIONS. 21
3 DENSITY STRUCTURE FROM 1.2 MM DUST CONTINUUM AND CS LINE EMISSION 23
3.1 INTRODUCTION. 24
3.2 OBSERVATIONS. 25
3.2.1 MILLIMETER CONTINUUM. 25
3.2.2 CS OBSERVATIONS. 25
3.3 RESULTS. 25
3.3.1 DUST MORPHOLOGIES. 25
3.3.2 COLUMN DENSITIES, VISUAL EXTINCTION, MASSES, AND AVERAGE DENSITIES
30
3.3.3 RADIAL PROFILES. 31
BIBLIOGRAFISCHE INFORMATIONEN
HTTP://D-NB.INFO/964564106
CONTENTS
3.3.4 CS AND C
34S OBSERVATIONS. 34
3.4 DISCUSSION. 35
3.4.1 IMPLICATIONS FROM THE RADIAL PROFILES. 36
3.4.2 LINE-WIDTH RELATIONS . 41
3.5 CONCLUSIONS. 42
4 MASSIVE MOLECULAR OUTFLOWS 44
4.1 INTRODUCTION. 45
4.2 OBSERVATIONS AT THE I RAM 30 M TELESCOPE. 46
4.3 OBSERVATIONAL RESULTS. 46
4.3.1 MORPHOLOGIES. 46
4.3.2 CHARACTERISTICS OF THE OUTFLOWS. 50
4.4 DISCUSSION. 53
4.4.1 HIGH-MASS VERSUS LOW-MASS OUTFLOWS. 53
4.4.2 MASS ENTRAINMENT AND ACCRETION RATES. 54
4.4.3 OUTFLOW MASS VERSUS CORE MASS . 56
4.5 CONCLUSIONS. 59
5 CH
3OH AND H20 MASERS IN HIGH-MASS STAR-FORMING REGIONS 61
5.1 INTRODUCTION. 62
5.2 OBSERVATIONS. 63
5.2.1 SINGLE-DISH H20 AND CH3OH MASER DATA. 63
5.2.2 H
20 MASER OBSERVATIONS WITH THE VLA. 63
5.2.3 CH3OH MASER OBSERVATIONS WITH THE ATCA. 63
5.2.4 OTHER OBSERVATIONS. 64
5.3 RESULTS. 64
5.3.1 THE DATABASE. 64
5.3.2 ASSOCIATIONS AND (NON-)CORRELATIONS. 67
5.3.3 INTERNAL MASER STRUCTURE. 69
5.4 DISCUSSION. 70
6 IRAS 05358+3543, A CASE STUDY: COLLIMATED AND MASSIVE OUTFLOWS 72
6.1 INTRODUCTION. 73
6.2 OBSERVATIONS. 74
6.2.1 PLATEAU DE BURE INTERFEROMETER (PDBI). 74
6.2.2 PICO VELETA (PV). 75
6.2.3 MERGING THE INTERFEROMETRIC AND SINGLE-DISH DATA. 76
6.2.4 CALTECH SUBMILLIMETER OBSERVATORY (CSO). 76
6.3 OBSERVATIONAL RESULTS. 76
6.3.1 SINGLE-DISH OBSERVATIONS . 76
6.3.2 INTERFEROMETRIC OBSERVATIONS. 80
6.3.3 INTERPRETATION OF SINGLE-DISH MAPS WITH PDBI DATA. 87
6.4 DISCUSSION. 87
6.4.1 THE 1 PC, HIGHLY COLLIMATED OUTFLOW (A) 87
6.4.2 THE HIGH-VELOCITY OUTFLOW
(B)
AND THE QUADRUPOLAR STRUCTURE . . 88
CONTENTS IX
6.4.3 THE SIO OUTFLOW
(C) . 88
6.4.4 THE LARGE-SCALE BENDING . 88
6.4.5 OUTFLOWS FROM YOUNG STELLAR OBJECTS OF ALL MASSES . 89
6.5 CONCLUSIONS. 90
7 HARD X-RAY EMISSION FROM A YOUNG MASSIVE STAR-FORMING CLUSTER 91
7.1 INTRODUCTION. 91
7.2 OBSERVATIONS. 93
7.2.1 CHANDRA X-RAY OBSERVATIONS AND DATA REDUCTION. 93
7.2.2 PLATEAU DE BURE MM OBSERVATIONS. 94
7.2.3 CALAR ALTO NEAR-INFRARED OBSERVATIONS. 94
7.3 RESULTS. 95
7.3.1 SOURCE DETECTIONS AND ASSOCIATIONS. 95
7.3.2 SPECTRAL INFORMATION, X-RAY LUMINOSITIES AND VARIABILITY. 95
7.3.3 MASS ESTIMATES FROM THE NEAR-INFRARED DATA. 99
7.3.4 THE X-RAY SOURCES IN DETAIL .100
7.4 CONCLUSIONS.102
8 SUMMARY AND OUTLOOK 104
8.1 SUMMARY .104
8.2 FUTURE PLANS.108
9 APPENDIX: TABLES 110
LIST OF PUBLICATIONS 137
BIBLIOGRAPHY 138
ACKNOWLEDGEMENTS 149
LIST OF FIGURES 131
LIST OF TABLES 152 |
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| indexdate | 2024-10-09T18:04:20Z |
| institution | BVB |
| language | English German |
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| physical | IX, 151 S. Ill., graph. Darst. |
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| spelling | Beuther, Henrik Verfasser aut Early stages of massive star formation von Henrik Beuther 2002 IX, 151 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Bonn, Univ., Diss., 2002. - Enth. Zsfassung in engl. und dt. Sprache Massereicher Stern (DE-588)4169052-7 gnd rswk-swf Sternentstehung (DE-588)4057364-3 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Massereicher Stern (DE-588)4169052-7 s Sternentstehung (DE-588)4057364-3 s DE-604 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=009922811&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Beuther, Henrik Early stages of massive star formation Massereicher Stern (DE-588)4169052-7 gnd Sternentstehung (DE-588)4057364-3 gnd |
| subject_GND | (DE-588)4169052-7 (DE-588)4057364-3 (DE-588)4113937-9 |
| title | Early stages of massive star formation |
| title_auth | Early stages of massive star formation |
| title_exact_search | Early stages of massive star formation |
| title_full | Early stages of massive star formation von Henrik Beuther |
| title_fullStr | Early stages of massive star formation von Henrik Beuther |
| title_full_unstemmed | Early stages of massive star formation von Henrik Beuther |
| title_short | Early stages of massive star formation |
| title_sort | early stages of massive star formation |
| topic | Massereicher Stern (DE-588)4169052-7 gnd Sternentstehung (DE-588)4057364-3 gnd |
| topic_facet | Massereicher Stern Sternentstehung Hochschulschrift |
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