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A spectroscopic analysis of the eclipsing Nova-like EC21178-54
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Astronomy
2014
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| _version_ | 1867614024744566784 |
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| access_status_str | Open Access |
| author | Khangale, Zwidofhelangani Ndamulelo |
| author2 | Woudt, Patrick Alan |
| author_browse | Khangale, Zwidofhelangani Ndamulelo Woudt, Patrick Alan |
| author_facet | Woudt, Patrick Alan Khangale, Zwidofhelangani Ndamulelo |
| author_sort | Khangale, Zwidofhelangani Ndamulelo |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/9185 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:45:28.359Z |
| 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 Astronomy |
| publisherStr | Department of Astronomy |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/9185 A spectroscopic analysis of the eclipsing Nova-like EC21178-54 Khangale, Zwidofhelangani Ndamulelo Woudt, Patrick Alan Includes bibliographical references. EC21178-54 is a 13.7 magnitude eclipsing nova-like (NL) cataclysmic variable (CV) discovered in the Edinburgh-Cape survey of blue objects. It has an orbital period of 3.708 hours. High-speed photometric analysis of its light curve reveal that this system is a rich source of quasi-periodic oscillations (QPOs), dwarf nova oscillations (DNOs) and the other type of periodic oscillations called longer period dwarf nova oscillations (lpDNOs). Its light curve shows a deep symmetrical V-shaped primary eclipse, and its spectra show strong broad double-peaked emission. In this project we present phase-resolved spectroscopy of the eclipsing nova-like CV EC21178-54. The average spectrum of EC21178-54 shows broad double-peaked emission lines from HeII 4686Å, and the Balmer series. HeII 4686Å dominates the Balmer lines; and in the Balmer lines the blueshifted component is the stronger of the two. The high-excitation feature, CIII/NIII at 4640-4650 Å, is also present and appear broad in emission. A number of other lines, mostly HeI, are clearly present in absorption and/or emission. 2014-11-05T03:55:23Z 2014-11-05T03:55:23Z 2013 Master Thesis Masters MSc http://hdl.handle.net/11427/9185 eng application/pdf Department of Astronomy Faculty of Science University of Cape Town |
| spellingShingle | Khangale, Zwidofhelangani Ndamulelo A spectroscopic analysis of the eclipsing Nova-like EC21178-54 |
| thesis_degree_str | Master's |
| title | A spectroscopic analysis of the eclipsing Nova-like EC21178-54 |
| title_full | A spectroscopic analysis of the eclipsing Nova-like EC21178-54 |
| title_fullStr | A spectroscopic analysis of the eclipsing Nova-like EC21178-54 |
| title_full_unstemmed | A spectroscopic analysis of the eclipsing Nova-like EC21178-54 |
| title_short | A spectroscopic analysis of the eclipsing Nova-like EC21178-54 |
| title_sort | spectroscopic analysis of the eclipsing nova like ec21178 54 |
| url | http://hdl.handle.net/11427/9185 |
| work_keys_str_mv | AT khangalezwidofhelanganindamulelo aspectroscopicanalysisoftheeclipsingnovalikeec2117854 AT khangalezwidofhelanganindamulelo spectroscopicanalysisoftheeclipsingnovalikeec2117854 |