Molecular clouds in the galactic center and selected external galaxies:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Buch |
| Sprache: | Undetermined |
| Veröffentlicht: |
1993
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| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | Bonn, Univ., Diss., 1993 |
| Beschreibung: | 185 S. Ill., graph. Darst. |
Internformat
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| 245 | 1 | 0 | |a Molecular clouds in the galactic center and selected external galaxies |c vorgelegt von Susanne Hüttemeister |
| 264 | 1 | |c 1993 | |
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Datensatz im Suchindex
| _version_ | 1812454106788265984 |
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| adam_text |
CONTENTS
1 INTRODUCTION AND SUMMARY 5
2 KINETIC TEMPERATURES IN GALACTIC CENTER CLOUDS 9
2.1 INTRODUCTION. 9
2.2 FUNDAMENTALS ON THE INTERPRETATION OF NH3 DATA. 11
2.2.1 OPTICAL DEPTH. 11
2.2.2 COLUMN DENSITY.-. 11
2.2.3 TEMPERATURES AND EXCITATION. 13
2.3 OBSERVATIONS. 15
2.3.1 43-M DATA. 15
2.3.2 100-M DATA. 17
2.4 RESULTS. 17
2.4.1 SOURCE LIST. 17
2.4.2 SPECTRAL LINE CALIBRATION. 1.7
2.4.3 FIT RESULTS. 20
2.5 COMPARISON OF 43-M AND 100-M DATA. 20
2.6 ANALYSIS OF THE SPECTRA. 20
2.6.1 LINE OPTICAL DEPTHS. 20
2.6.2 COLUMN DENSITIES AND TEMPERATURES. 25
2.6.3 ROTATIONAL TEMPERATURES FOR ORTHO-NH3. 30
2.7 DISCUSSION .'. 30
2.7.1 A SIMPLIFIED MODEL OF THE AMMONIA EMISSION. 30
2.7.2 HEATING AND COOLING OF THE GAS. 31
2.8 CONCLUSIONS. 33
3 A MULTILEVEL STUDY OF AMMONIA IN SGR B2 37
3.1 INTRODUCTION. 37
3.2 BEAM FILLING FACTORS AND SOURCE GEOMETRY. 38
3.3 OBSERVATIONS. 42
3.3.1 CONTINUUM MEASUREMENTS, POINTING, AND CALIBRATION. 42
3.3.2 SPECTRAL LINE OBSERVATIONS . 42
3.4 RESULTS. 44
3.5 HYPERFINE SATELLITE RATIOS AND OPTICAL DEPTHS. 44
3.6 DISTRIBUTION AND PHYSICAL PARAMETERS OF THE NH3 CLOUDS. 47
3.6.1 THE METASTABLE ABSORPTION LINES. 47
3.6.2 THE METASTABLE EMISSION LINES. 51
1
BIBLIOGRAFISCHE INFORMATIONEN
HTTP://D-NB.INFO/940986256
2
CONTENTS
3.6.3 THE NON-METASTABLE EMISSION . 55
3.6.4 THE NON-METASTABLE ABSORPTION TOWARD SGR B2 (M). 59
3.7 COMPARISON WITH OTHER DATA. 60
3.7.1 NH3 AND OTHER MOLECULAR SPECIES . 60
3.7.2 FAR INFRARED CONTINUUM MAPS . 61
3.7.3 THE HEATING OF THE GAS. 61
3.7.4 HOT CORE PROPERTIES. 63
3.8 A MODEL OF THE SGR B2 REGION. 63
3.9 CONCLUSIONS. 66
4 NH
3 IN SGR B2 AT 1 CM WAVELENGTH 71
4.1 INTRODUCTION. 71
4.2 OBSERVATIONS. 71
4.3 RESULTS. 73
4.4 DISCUSSION. 78
5 CS AND C
LSO OBSERVATIONS OF GALACTIC CENTER CLOUDS 83
5.1 INTRODUCTION AND METHODS. 83
5.1.1 THE USEFULNESS OF CS AND C180 AS DENSITY PROBES. 83
5.1.2 RADIATIVE TRANSFER IN THE SOBOLEV APPROXIMATION . 84
5.2 OBSERVATIONS. 86
5.2.1 GENERAL REMARKS . 86
5.2.2 CALIBRATION . 87
5.2.3 CS MEASUREMENTS. 88
5.2.4 C180 MEASUREMENTS. 89
5.3 RESULTS. 90
5.3.1 CS RESULTS. 90
5.3.2 C180 RESULTS. 91
5.4 DISCUSSION. 102
5.4.1 DENSITY DETERMINATIONS FROM CS. 102,
5.4.2 INTERPRETATION OF THE C180 DATA. 118
5.4.3 THE EXCITATION OF HNCO IN GALACTIC CENTER CLOUDS. 130
5.5 CONCLUSIONS. 131
6 OBSERVATIONS OF HNC IN EXTERNAL GALAXIES 135
6.1 INTRODUCTION. 135
6.2 OBSERVATIONS. 136
6.3 RESULTS. 136
6.4 DISCUSSION. 145
6.4.1 A COMPARISON OF HNC TO OTHER TRACERS OF MOLECULAR GAS AND
STAR FORMATION. 145
6.4.2 RELATIONS BETWEEN THE LINE INTENSITIES OF HNC, HCN AND HCO+ 147
6.4.3 THE LINE INTENSITIES OF HNC, CN AND CS. 151
6.4.4 RELATIONS BETWEEN HNC, HCN AND CO. 152
6.4.5 INFRARED LUMINOSITIES. 152
6.5 CONCLUSIONS. 154
CONTENTS
3
7 EXTRAGALACTIC OBSERVATIONS OF H
2CO AND CH3OH 157
7.1 INTRODUCTION. 157
7.2 OBSERVATIONS. 158
7.3 SOME PRELIMINARY RESULTS. 167
7.3.1 FORMALDEHYDE. 170
7.3.2 METHANOL . 171
8 FAR OUT: THE PRIMEVAL GALAXY IRAS F10214+4724 173
8.1 INTRODUCTION. 173
8.2
OBSERVATIONS AND DISCUSSION. 174
8.2.1 MOTIVATION AND PROCEDURE. 176
8.2.2 INTERPRETATION OF A NON-RESULT . 177 |
| any_adam_object | 1 |
| author | Hüttemeister, Susanne 1963- |
| author_GND | (DE-588)114014183 |
| author_facet | Hüttemeister, Susanne 1963- |
| author_role | aut |
| author_sort | Hüttemeister, Susanne 1963- |
| author_variant | s h sh |
| building | Verbundindex |
| bvnumber | BV009113050 |
| classification_tum | PHY 920d PHY 973d |
| ctrlnum | (OCoLC)632850324 (DE-599)BVBBV009113050 |
| discipline | Physik |
| format | Book |
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| genre | (DE-588)4113937-9 Hochschulschrift gnd-content |
| genre_facet | Hochschulschrift |
| geographic | Galaktisches Zentrum (DE-588)1085662543 gnd |
| geographic_facet | Galaktisches Zentrum |
| id | DE-604.BV009113050 |
| illustrated | Illustrated |
| indexdate | 2024-10-09T16:22:11Z |
| institution | BVB |
| language | Undetermined |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-006041969 |
| oclc_num | 632850324 |
| open_access_boolean | |
| owner | DE-91 DE-BY-TUM |
| owner_facet | DE-91 DE-BY-TUM |
| physical | 185 S. Ill., graph. Darst. |
| publishDate | 1993 |
| publishDateSearch | 1993 |
| publishDateSort | 1993 |
| record_format | marc |
| spelling | Hüttemeister, Susanne 1963- Verfasser (DE-588)114014183 aut Molecular clouds in the galactic center and selected external galaxies vorgelegt von Susanne Hüttemeister 1993 185 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Bonn, Univ., Diss., 1993 Molekülwolke (DE-588)4114619-0 gnd rswk-swf Radioastronomie (DE-588)4048200-5 gnd rswk-swf Galaxie (DE-588)4057375-8 gnd rswk-swf Galaktisches Zentrum (DE-588)1085662543 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Galaktisches Zentrum (DE-588)1085662543 g Molekülwolke (DE-588)4114619-0 s DE-604 Galaxie (DE-588)4057375-8 s Radioastronomie (DE-588)4048200-5 s DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=006041969&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Hüttemeister, Susanne 1963- Molecular clouds in the galactic center and selected external galaxies Molekülwolke (DE-588)4114619-0 gnd Radioastronomie (DE-588)4048200-5 gnd Galaxie (DE-588)4057375-8 gnd |
| subject_GND | (DE-588)4114619-0 (DE-588)4048200-5 (DE-588)4057375-8 (DE-588)1085662543 (DE-588)4113937-9 |
| title | Molecular clouds in the galactic center and selected external galaxies |
| title_auth | Molecular clouds in the galactic center and selected external galaxies |
| title_exact_search | Molecular clouds in the galactic center and selected external galaxies |
| title_full | Molecular clouds in the galactic center and selected external galaxies vorgelegt von Susanne Hüttemeister |
| title_fullStr | Molecular clouds in the galactic center and selected external galaxies vorgelegt von Susanne Hüttemeister |
| title_full_unstemmed | Molecular clouds in the galactic center and selected external galaxies vorgelegt von Susanne Hüttemeister |
| title_short | Molecular clouds in the galactic center and selected external galaxies |
| title_sort | molecular clouds in the galactic center and selected external galaxies |
| topic | Molekülwolke (DE-588)4114619-0 gnd Radioastronomie (DE-588)4048200-5 gnd Galaxie (DE-588)4057375-8 gnd |
| topic_facet | Molekülwolke Radioastronomie Galaxie Galaktisches Zentrum Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=006041969&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| work_keys_str_mv | AT huttemeistersusanne molecularcloudsinthegalacticcenterandselectedexternalgalaxies |