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Tracing morphological indicators of radio galaxy interaction with ambient medium using MeerKAT data
Dissertation (MSc (Physics))--University of Pretoria, 2025.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2025
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| _version_ | 1867613639513473024 |
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| access_status_str | Open Access |
| author2 | Thorat, Kshitij |
| author_browse | Thorat, Kshitij |
| author_facet | Thorat, Kshitij |
| collection | Thesis |
| dc_rights_str_mv | © 2023 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, 2025. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/100796 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:39:20.633Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| 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:2263/100796 Tracing morphological indicators of radio galaxy interaction with ambient medium using MeerKAT data Thorat, Kshitij u17261598@tuks.co.za Bonnassieux, Etienne Mogamisi, Katlego UCTD Sustainable Development Goals (SDGs) Radio galaxies Active galactic nuclei Radio astronomy Cosmic web Radio interferometry Dissertation (MSc (Physics))--University of Pretoria, 2025. As radio galaxies interact with their gaseous environments, their morphologies are affected by the environment and the environment in turn is affected by the jet-mode feedback. These effects caused by the environment can be seen in the morphologies of the radio galaxies, which allows us to use radio galaxies as probes to estimate the properties of their environment. In effect, this allows us a view of the components of the Universe which are only accessible through such specialised observation: the non-thermal Universe. In this work, using sensitive MeerKAT observations of radio galaxies in various environments, we endeavour to estimate the properties of galaxy cluster environments, galaxy group environments and filamentary Warm-Hot intergalactic environments. Using the interferometric images from the MeerKAT Galaxy Cluster Legacy Radio Survey (MGCLS) we selected a subset of radio galaxies which are associated with various media, supplementing the data with other MeerKAT images in the case of Intra-Group Media, which are not captured in MGCLS images. In this dissertation, we present the analysis of the sample sources to estimate their physical and morphological properties and link them to possible environmental influences. For the first time, we estimate the WHIM filamentary pressure and density of the filaments towards the direction of Abell 22 cluster using three Bent-tailed galaxies and compare our results with those available in the literature. We also report the discovery of relic emission in the bridge between A3391 and A3395 and use other galaxies, including G4Jy 917, in different cluster environments to put constraints on Intra-Cluster Media. Finally, we look at the faint, relic cocoon emission of the giant X-shaped radio galaxy PKS 2014-55 to help us understand Intra-Group media better. This study paves the way towards targeted radio observations of radio galaxies in diffuse gas media, in particular WHIM filaments. NRF-SARAO Physics MSc (Physics) Unrestricted Faculty of Natural and Agricultural Sciences SDG-09: Industry, innovation and infrastructure 2025-02-12T13:36:50Z 2025-02-12T13:36:50Z 2025-04 2025-02 Dissertation * A2025 http://hdl.handle.net/2263/100796 https://doi.org/10.25403/UPresearchdata.28399466 en © 2023 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 | UCTD Sustainable Development Goals (SDGs) Radio galaxies Active galactic nuclei Radio astronomy Cosmic web Radio interferometry Tracing morphological indicators of radio galaxy interaction with ambient medium using MeerKAT data |
| title | Tracing morphological indicators of radio galaxy interaction with ambient medium using MeerKAT data |
| title_full | Tracing morphological indicators of radio galaxy interaction with ambient medium using MeerKAT data |
| title_fullStr | Tracing morphological indicators of radio galaxy interaction with ambient medium using MeerKAT data |
| title_full_unstemmed | Tracing morphological indicators of radio galaxy interaction with ambient medium using MeerKAT data |
| title_short | Tracing morphological indicators of radio galaxy interaction with ambient medium using MeerKAT data |
| title_sort | tracing morphological indicators of radio galaxy interaction with ambient medium using meerkat data |
| topic | UCTD Sustainable Development Goals (SDGs) Radio galaxies Active galactic nuclei Radio astronomy Cosmic web Radio interferometry |
| url | http://hdl.handle.net/2263/100796 https://doi.org/10.25403/UPresearchdata.28399466 |