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...
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ftdatacite:10.48550/arxiv.1807.01522 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. Lopez-Sanchez, Angel R. Richards, Samuel N. Zafar, Tayyaba Lawrence, Jon S. Lorente, Nuria P. F. Owers, Matt S. Scott, Nicholas 2018 https://dx.doi.org/10.48550/arxiv.1807.01522 https://arxiv.org/abs/1807.01522 unknown arXiv https://dx.doi.org/10.1093/mnras/sty1782 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Astrophysics of Galaxies astro-ph.GA FOS Physical sciences article-journal Article ScholarlyArticle Text 2018 ftdatacite https://doi.org/10.48550/arxiv.1807.01522 https://doi.org/10.1093/mnras/sty1782 2022-04-01T09:09:01Z 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 ([OII]+[OIII])/H$β$ (R23) and [OIII]/[OII] (O32). The maps are created on a spaxel-by-spaxel basis because HII regions are not resolved at the SAMI spatial resolution. We combine the SAMI data with stellar mass, star formation rate (SFR), effective radius (R$_e$), ellipticity, and position angles (PA) from the GAMA survey to analyze 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/R$_e$. Only two galaxies show radial gradients in ionization parameter. We find that the ionization parameter has no significant correlation with either SFR, sSFR (specific star formation rate), or metallicity. For several individual galaxies we find 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 which have not considered the effects of a varying ionization parameter distribution. : 38 pages, 11 figures + Appendix, accepted for publication by MNRAS Text sami DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
unknown |
topic |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
spellingShingle |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences 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. Lopez-Sanchez, Angel 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 |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
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 ([OII]+[OIII])/H$β$ (R23) and [OIII]/[OII] (O32). The maps are created on a spaxel-by-spaxel basis because HII regions are not resolved at the SAMI spatial resolution. We combine the SAMI data with stellar mass, star formation rate (SFR), effective radius (R$_e$), ellipticity, and position angles (PA) from the GAMA survey to analyze 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/R$_e$. Only two galaxies show radial gradients in ionization parameter. We find that the ionization parameter has no significant correlation with either SFR, sSFR (specific star formation rate), or metallicity. For several individual galaxies we find 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 which have not considered the effects of a varying ionization parameter distribution. : 38 pages, 11 figures + Appendix, accepted for publication by MNRAS |
format |
Text |
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. Lopez-Sanchez, Angel 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. Lopez-Sanchez, Angel 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 |
arXiv |
publishDate |
2018 |
url |
https://dx.doi.org/10.48550/arxiv.1807.01522 https://arxiv.org/abs/1807.01522 |
genre |
sami |
genre_facet |
sami |
op_relation |
https://dx.doi.org/10.1093/mnras/sty1782 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1807.01522 https://doi.org/10.1093/mnras/sty1782 |
_version_ |
1766183793875484672 |