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The motion of stars and the accretion of matter in the fermion ball and black hole scenarios of the galactic centre
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Physics
2014
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| _version_ | 1867613191136083969 |
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| access_status_str | Open Access |
| author | Halliday, Samuel James Alexander |
| author2 | Viollier, Raoul |
| author_browse | Halliday, Samuel James Alexander Viollier, Raoul |
| author_facet | Viollier, Raoul Halliday, Samuel James Alexander |
| author_sort | Halliday, Samuel James Alexander |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/9586 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:13.078Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Physics |
| publisherStr | Department of Physics |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/9586 The motion of stars and the accretion of matter in the fermion ball and black hole scenarios of the galactic centre Halliday, Samuel James Alexander Viollier, Raoul Includes bibliographical references. The motion of stars SO-I, SO-2 and SO-4, in the vicinity of the galactic centre, is investigated using a X2 analysis of the parameters in our line of sight. The resulting phase spaces for the black hole and fermion ball scenarios are compared. We find that due to the lack of accurate z or Vz data, the upper limit of required observational time to discriminate between the scenarios is of the order 30 to 40 years. Such z and Vz data might allow us to eliminate one of the scenarios immediately. The spectrum from the Sgr A * region is also investigated using a simple Newtonian, optically thick and geometrically thin model for each scenario. As has already been known for some time, this technique is not applicable to a possible black hole scenario at Sgr A * and as a consequence, is incapable of explaining a cut-off in the spectrum at around 1013Hz. This cut-off follows naturally from the fermion ball potential distribution in this simple model. It should be noted that Advection Dominated Accretion Flow models (not investigated here) are able to predict the observed spectrum for the black hole scenario. 2014-11-11T20:19:23Z 2014-11-11T20:19:23Z 2003 Master Thesis Masters MSc http://hdl.handle.net/11427/9586 eng application/pdf Department of Physics Faculty of Science University of Cape Town |
| spellingShingle | Halliday, Samuel James Alexander The motion of stars and the accretion of matter in the fermion ball and black hole scenarios of the galactic centre |
| thesis_degree_str | Master's |
| title | The motion of stars and the accretion of matter in the fermion ball and black hole scenarios of the galactic centre |
| title_full | The motion of stars and the accretion of matter in the fermion ball and black hole scenarios of the galactic centre |
| title_fullStr | The motion of stars and the accretion of matter in the fermion ball and black hole scenarios of the galactic centre |
| title_full_unstemmed | The motion of stars and the accretion of matter in the fermion ball and black hole scenarios of the galactic centre |
| title_short | The motion of stars and the accretion of matter in the fermion ball and black hole scenarios of the galactic centre |
| title_sort | motion of stars and the accretion of matter in the fermion ball and black hole scenarios of the galactic centre |
| url | http://hdl.handle.net/11427/9586 |
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