Gone with the wind: signatures of gas removal in environmentally perturbed galaxies
The knowledge of a galaxy's star formation history, both globally and in a resolved manner, provide key pieces of information for understanding galaxy formation and evolution. The KOALA integral field unit (IFU) and the AAOmega spectrograph on the Anglo-Australian Telescope (AAT) were used to f...
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ftdatacite:10.25949/19440836.v1 2023-05-15T18:11:35+02:00 Gone with the wind: signatures of gas removal in environmentally perturbed galaxies Beard, Taylah Kate 2022 https://dx.doi.org/10.25949/19440836.v1 https://figshare.mq.edu.au/articles/thesis/Gone_with_the_wind_signatures_of_gas_removal_in_environmentally_perturbed_galaxies/19440836/1 unknown Macquarie University https://dx.doi.org/10.25949/19440836 In Copyright http://rightsstatements.org/vocab/InC/1.0/ Other education not elsewhere classified article-journal ScholarlyArticle Thesis Text 2022 ftdatacite https://doi.org/10.25949/19440836.v1 https://doi.org/10.25949/19440836 2022-04-01T18:29:28Z The knowledge of a galaxy's star formation history, both globally and in a resolved manner, provide key pieces of information for understanding galaxy formation and evolution. The KOALA integral field unit (IFU) and the AAOmega spectrograph on the Anglo-Australian Telescope (AAT) were used to follow up two galaxies within Abell 119 (z = 0:0442) which were previously investigated within the SAMI Galaxy Survey. The KOALA IFU provides a wider field of view of these galaxies when compared with the SAMI observations, allowing the search for signatures of environmental interactions which occur at large galactocentric distances, such as ionised tails of stripped gas. In both galaxies, 9011900084 and 9011900166, we observed one-sided extraplanar tails of ionised gas extending respectively ~ 16:1 kpc and ~ 6:1 kpc in projection off their stellar disk. The orientation of these tails in relation to the cluster centre inferred the galaxies direction of motion as towards apocentre from observed post-pericentre and pericentre positions, respectively. Line ratios measured in the tails indicate ionisation through non-SF LINER sources, unlike that observed in jellyfish galaxies. This thesis therefore supports a scenario where ram pressure stripping (RPS) is removing gas from galaxies as they traverse the cluster, leading to the ongoing quenching of star formation. Text sami DataCite Metadata Store (German National Library of Science and Technology) |
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Other education not elsewhere classified Beard, Taylah Kate Gone with the wind: signatures of gas removal in environmentally perturbed galaxies |
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Other education not elsewhere classified |
description |
The knowledge of a galaxy's star formation history, both globally and in a resolved manner, provide key pieces of information for understanding galaxy formation and evolution. The KOALA integral field unit (IFU) and the AAOmega spectrograph on the Anglo-Australian Telescope (AAT) were used to follow up two galaxies within Abell 119 (z = 0:0442) which were previously investigated within the SAMI Galaxy Survey. The KOALA IFU provides a wider field of view of these galaxies when compared with the SAMI observations, allowing the search for signatures of environmental interactions which occur at large galactocentric distances, such as ionised tails of stripped gas. In both galaxies, 9011900084 and 9011900166, we observed one-sided extraplanar tails of ionised gas extending respectively ~ 16:1 kpc and ~ 6:1 kpc in projection off their stellar disk. The orientation of these tails in relation to the cluster centre inferred the galaxies direction of motion as towards apocentre from observed post-pericentre and pericentre positions, respectively. Line ratios measured in the tails indicate ionisation through non-SF LINER sources, unlike that observed in jellyfish galaxies. This thesis therefore supports a scenario where ram pressure stripping (RPS) is removing gas from galaxies as they traverse the cluster, leading to the ongoing quenching of star formation. |
format |
Text |
author |
Beard, Taylah Kate |
author_facet |
Beard, Taylah Kate |
author_sort |
Beard, Taylah Kate |
title |
Gone with the wind: signatures of gas removal in environmentally perturbed galaxies |
title_short |
Gone with the wind: signatures of gas removal in environmentally perturbed galaxies |
title_full |
Gone with the wind: signatures of gas removal in environmentally perturbed galaxies |
title_fullStr |
Gone with the wind: signatures of gas removal in environmentally perturbed galaxies |
title_full_unstemmed |
Gone with the wind: signatures of gas removal in environmentally perturbed galaxies |
title_sort |
gone with the wind: signatures of gas removal in environmentally perturbed galaxies |
publisher |
Macquarie University |
publishDate |
2022 |
url |
https://dx.doi.org/10.25949/19440836.v1 https://figshare.mq.edu.au/articles/thesis/Gone_with_the_wind_signatures_of_gas_removal_in_environmentally_perturbed_galaxies/19440836/1 |
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sami |
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sami |
op_relation |
https://dx.doi.org/10.25949/19440836 |
op_rights |
In Copyright http://rightsstatements.org/vocab/InC/1.0/ |
op_doi |
https://doi.org/10.25949/19440836.v1 https://doi.org/10.25949/19440836 |
_version_ |
1766184230342098944 |