The SAMI Galaxy Survey: spatially resolved metallicity and ionization mapping
We present gas-phase metallicity and ionization parameter maps of 25 star-forming face-on spiral galaxies from the SAMI Galaxy Survey Data Release 1. Self-consistent metallicity and ionization parameter maps are calculated simultaneously through an iterative process to account for the interdependenc...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Language: | English |
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Oxford University Press
2018
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Online Access: | https://espace.library.uq.edu.au/view/UQ:3313ffb/UQ3313ffb_OA.pdf https://espace.library.uq.edu.au/view/UQ:3313ffb |
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:3313ffb 2023-05-15T18:11:05+02:00 The SAMI Galaxy Survey: spatially resolved metallicity and ionization mapping Poetrodjojo, Henry Groves, Brent Kewley, Lisa J. Medling, Anne M. Sweet, Sarah M. van de Sande, Jesse Sanchez, Sebastian F. Bland-Hawthorn, Joss Brough, Sarah Bryant, Julia J. Cortese, Luca Croom, Scott M. López-Sánchez, Ángel R. Richards, Samuel N. Zafar, Tayyaba Lawrence, Jon S. Lorente, Nuria P. F. Owers, Matt S. Scott, Nicholas 2018-07-05 https://espace.library.uq.edu.au/view/UQ:3313ffb/UQ3313ffb_OA.pdf https://espace.library.uq.edu.au/view/UQ:3313ffb eng eng Oxford University Press doi:10.1093/mnras/sty1782 issn:0035-8711 issn:1365-2966 orcid:0000-0002-1576-2505 CE110001020 CE170100013 FT140101202 FT140101166 FT140100255 HST-HF2-51377 NAS5-26555 FL140100278 CB-285080 IA101217 Not set Space and Planetary Science Astronomy and Astrophysics Journal Article 2018 ftunivqespace https://doi.org/10.1093/mnras/sty1782 2020-12-08T07:44:42Z We present gas-phase metallicity and ionization parameter maps of 25 star-forming face-on spiral galaxies from the SAMI Galaxy Survey Data Release 1. Self-consistent metallicity and ionization parameter maps are calculated simultaneously through an iterative process to account for the interdependence of the strong emission line diagnostics involving ([O II]+[O III])/Hβ (R23) and [O III]/[O II](O32). The maps are created on a spaxel-by-spaxel basis because H II regions are not resolved at the SAMI spatial resolution. We combine the SAMI data with stellar mass, star formation rate (SFR), effective radius (Re), ellipticity, and position angles (PA) from the GAMA survey to analyse their relation to the metallicity and ionization parameter. We find a weak trend of steepening metallicity gradient with galaxy stellar mass, with values ranging from −0.03 to −0.20 dex/Re. Only two galaxies show radial gradients in the ionization parameter. We find that the ionization parameter has no significant correlation with either SFR, sSFR (specific SFR), or metallicity. For several individual galaxies, we find the structure in the ionization parameter maps suggestive of spiral arm features. We find a typical ionization parameter range of 7.0 < log (q) < 7.8 for our galaxy sample with no significant overall structure. An ionization parameter range of this magnitude is large enough to caution the use of metallicity diagnostics that have not considered the effects of a varying ionization parameter distribution. Article in Journal/Newspaper sami The University of Queensland: UQ eSpace Monthly Notices of the Royal Astronomical Society 479 4 5235 5265 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Space and Planetary Science Astronomy and Astrophysics |
spellingShingle |
Space and Planetary Science Astronomy and Astrophysics Poetrodjojo, Henry Groves, Brent Kewley, Lisa J. Medling, Anne M. Sweet, Sarah M. van de Sande, Jesse Sanchez, Sebastian F. Bland-Hawthorn, Joss Brough, Sarah Bryant, Julia J. Cortese, Luca Croom, Scott M. López-Sánchez, Ángel R. Richards, Samuel N. Zafar, Tayyaba Lawrence, Jon S. Lorente, Nuria P. F. Owers, Matt S. Scott, Nicholas The SAMI Galaxy Survey: spatially resolved metallicity and ionization mapping |
topic_facet |
Space and Planetary Science Astronomy and Astrophysics |
description |
We present gas-phase metallicity and ionization parameter maps of 25 star-forming face-on spiral galaxies from the SAMI Galaxy Survey Data Release 1. Self-consistent metallicity and ionization parameter maps are calculated simultaneously through an iterative process to account for the interdependence of the strong emission line diagnostics involving ([O II]+[O III])/Hβ (R23) and [O III]/[O II](O32). The maps are created on a spaxel-by-spaxel basis because H II regions are not resolved at the SAMI spatial resolution. We combine the SAMI data with stellar mass, star formation rate (SFR), effective radius (Re), ellipticity, and position angles (PA) from the GAMA survey to analyse their relation to the metallicity and ionization parameter. We find a weak trend of steepening metallicity gradient with galaxy stellar mass, with values ranging from −0.03 to −0.20 dex/Re. Only two galaxies show radial gradients in the ionization parameter. We find that the ionization parameter has no significant correlation with either SFR, sSFR (specific SFR), or metallicity. For several individual galaxies, we find the structure in the ionization parameter maps suggestive of spiral arm features. We find a typical ionization parameter range of 7.0 < log (q) < 7.8 for our galaxy sample with no significant overall structure. An ionization parameter range of this magnitude is large enough to caution the use of metallicity diagnostics that have not considered the effects of a varying ionization parameter distribution. |
format |
Article in Journal/Newspaper |
author |
Poetrodjojo, Henry Groves, Brent Kewley, Lisa J. Medling, Anne M. Sweet, Sarah M. van de Sande, Jesse Sanchez, Sebastian F. Bland-Hawthorn, Joss Brough, Sarah Bryant, Julia J. Cortese, Luca Croom, Scott M. López-Sánchez, Ángel R. Richards, Samuel N. Zafar, Tayyaba Lawrence, Jon S. Lorente, Nuria P. F. Owers, Matt S. Scott, Nicholas |
author_facet |
Poetrodjojo, Henry Groves, Brent Kewley, Lisa J. Medling, Anne M. Sweet, Sarah M. van de Sande, Jesse Sanchez, Sebastian F. Bland-Hawthorn, Joss Brough, Sarah Bryant, Julia J. Cortese, Luca Croom, Scott M. López-Sánchez, Ángel R. Richards, Samuel N. Zafar, Tayyaba Lawrence, Jon S. Lorente, Nuria P. F. Owers, Matt S. Scott, Nicholas |
author_sort |
Poetrodjojo, Henry |
title |
The SAMI Galaxy Survey: spatially resolved metallicity and ionization mapping |
title_short |
The SAMI Galaxy Survey: spatially resolved metallicity and ionization mapping |
title_full |
The SAMI Galaxy Survey: spatially resolved metallicity and ionization mapping |
title_fullStr |
The SAMI Galaxy Survey: spatially resolved metallicity and ionization mapping |
title_full_unstemmed |
The SAMI Galaxy Survey: spatially resolved metallicity and ionization mapping |
title_sort |
sami galaxy survey: spatially resolved metallicity and ionization mapping |
publisher |
Oxford University Press |
publishDate |
2018 |
url |
https://espace.library.uq.edu.au/view/UQ:3313ffb/UQ3313ffb_OA.pdf https://espace.library.uq.edu.au/view/UQ:3313ffb |
genre |
sami |
genre_facet |
sami |
op_relation |
doi:10.1093/mnras/sty1782 issn:0035-8711 issn:1365-2966 orcid:0000-0002-1576-2505 CE110001020 CE170100013 FT140101202 FT140101166 FT140100255 HST-HF2-51377 NAS5-26555 FL140100278 CB-285080 IA101217 Not set |
op_doi |
https://doi.org/10.1093/mnras/sty1782 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
479 |
container_issue |
4 |
container_start_page |
5235 |
op_container_end_page |
5265 |
_version_ |
1766183789956956160 |