Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
A MeerKAT morphological and spectral index study of M87
Dissertation (MSc (Physics))--University of Pretoria, 2022.
Saved in:
| Other Authors: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
University of Pretoria
2022
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613524183744512 |
|---|---|
| access_status_str | Open Access |
| author2 | Dean, Roger |
| author_browse | Dean, Roger |
| author_facet | Dean, Roger |
| collection | Thesis |
| dc_rights_str_mv | © 2022 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MSc (Physics))--University of Pretoria, 2022. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/86434 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:37:30.755Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/86434 A MeerKAT morphological and spectral index study of M87 Dean, Roger u13371062@tuks.co.za Thorat, Kshitij Mtshweni, Leon MeerKAT Astronomy Radio survey Messier 87 Spectral indices UCTD Dissertation (MSc (Physics))--University of Pretoria, 2022. Messier 87 (M87) is a spectacular radio galaxy located in our cosmic backyard. Its proximity has allowed astronomers to study it in detail across the electromagnetic spectrum. M87 shows a complex structure in the radio continuum made up of a bright core, jets and a diffuse halo. High fidelity imaging of this bright (> 300$\, $Jy), complex source is necessary to understanding its evolution. MeerKAT’s sensitivity and spatial resolution make it an ideal instrument to study M87's extended, diffuse radio structure. We present the MeerKAT 1.28$\, $GHz total-intensity map, in-band spectral index image, and an analysis of its complex morphological structure. A comparison of the MeerKAT map with the VLA map is conducted, comparing all key features, by means of a two point spectral index map at the respective frequencies, 1.28$\, $GHz and 327$\, $MHz. Our results 1) verify the structures seen in the VLA 327$\, $MHz image, made using maximum entropy techniques 2) show the first spectral index of the filamentary structures 3) demonstrate the ability of MeerKAT to map complex, diffuse structures at higher frequencies than before, extending the frequency range to enable for more detailed, spatially resolved spectral analysis. In conclusion, we find results that are consistent with what has been observed about M87, that it is an active galaxy with a steady spectral variation across a large radio frequency range. SARAO NRF IDIA Physics MSc (Physics) Unrestricted 2022-07-25T10:46:20Z 2022-07-25T10:46:20Z 2022-09-06 2022-03-29 Dissertation * S2022 https://repository.up.ac.za/handle/2263/86434 https://doi.org/10.25403/UPresearchdata.20358261 en © 2022 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | MeerKAT Astronomy Radio survey Messier 87 Spectral indices UCTD A MeerKAT morphological and spectral index study of M87 |
| title | A MeerKAT morphological and spectral index study of M87 |
| title_full | A MeerKAT morphological and spectral index study of M87 |
| title_fullStr | A MeerKAT morphological and spectral index study of M87 |
| title_full_unstemmed | A MeerKAT morphological and spectral index study of M87 |
| title_short | A MeerKAT morphological and spectral index study of M87 |
| title_sort | meerkat morphological and spectral index study of m87 |
| topic | MeerKAT Astronomy Radio survey Messier 87 Spectral indices UCTD |
| url | https://repository.up.ac.za/handle/2263/86434 https://doi.org/10.25403/UPresearchdata.20358261 |