The SAMI Galaxy Survey:reconciling strong emission line metallicity diagnostics using metallicity gradients
We measure the gas-phase metallicity gradients of 248 galaxies selected from Data Release 2 of the SAMI Galaxy Survey. We demonstrate that there are large systematic discrepancies between the metallicity gradients derived using common strong emission line metallicity diagnostics. We determine which...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Main Authors: | , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2021
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Online Access: | https://researchers.mq.edu.au/en/publications/6df6c2f1-967b-48ee-ada1-91252c6e63f8 https://doi.org/10.1093/mnras/stab205 https://research-management.mq.edu.au/ws/files/168199791/167728476.pdf http://purl.org/au-research/grants/arc/FT140100255 http://www.scopus.com/inward/record.url?scp=85105040693&partnerID=8YFLogxK |
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ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/6df6c2f1-967b-48ee-ada1-91252c6e63f8 2024-06-23T07:56:32+00:00 The SAMI Galaxy Survey:reconciling strong emission line metallicity diagnostics using metallicity gradients Poetrodjojo, Henry Groves, Brent Kewley, Lisa J. Sweet, Sarah M. Sanchez, Sebastian F. Medling, Anne M. López-Sánchez, Ángel R. Brough, Sarah Cortese, Luca van de Sande, Jesse Vaughan, Sam Richards, Samuel N. Bryant, Julia J. Croom, Scott M. Bland-Hawthorn, Joss Goodwin, Michael Lawrence, Jon S. Owers, Matt S. Scott, Nicholas 2021-04 application/pdf https://researchers.mq.edu.au/en/publications/6df6c2f1-967b-48ee-ada1-91252c6e63f8 https://doi.org/10.1093/mnras/stab205 https://research-management.mq.edu.au/ws/files/168199791/167728476.pdf http://purl.org/au-research/grants/arc/FT140100255 http://www.scopus.com/inward/record.url?scp=85105040693&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Poetrodjojo , H , Groves , B , Kewley , L J , Sweet , S M , Sanchez , S F , Medling , A M , López-Sánchez , Á R , Brough , S , Cortese , L , van de Sande , J , Vaughan , S , Richards , S N , Bryant , J J , Croom , S M , Bland-Hawthorn , J , Goodwin , M , Lawrence , J S , Owers , M S & Scott , N 2021 , ' The SAMI Galaxy Survey : reconciling strong emission line metallicity diagnostics using metallicity gradients ' , Monthly Notices of the Royal Astronomical Society , vol. 502 , no. 3 , pp. 3357-3373 . https://doi.org/10.1093/mnras/stab205 galaxies: abundances galaxies: fundamental parameters galaxies: ISM article 2021 ftmacquarieunicr https://doi.org/10.1093/mnras/stab205 2024-06-12T23:47:23Z We measure the gas-phase metallicity gradients of 248 galaxies selected from Data Release 2 of the SAMI Galaxy Survey. We demonstrate that there are large systematic discrepancies between the metallicity gradients derived using common strong emission line metallicity diagnostics. We determine which pairs of diagnostics have Spearman's rank coefficients greater than 0.6 and provide linear conversions to allow the accurate comparison of metallicity gradients derived using different strong emission line diagnostics. For galaxies within the mass range 8.5 <log (M/M ⊙ ) <11.0, we find discrepancies of up to 0.11 dex/R e between seven popular diagnostics in the metallicity gradient-mass relation. We find a suggestion of a break in the metallicity gradient-mass relation, where the slope shifts from negative to positive, occurs between 9.5 <log (M/M ⊙ ) <10.5 for the seven chosen diagnostics. Applying our conversions to the metallicity gradient-mass relation, we reduce the maximum dispersion from 0.11 dex/R e to 0.02 dex/R e . These conversions provide the most accurate method of converting metallicity gradients when key emission lines are unavailable. We find that diagnostics that share common sets of emission line ratios agree best, and that diagnostics calibrated through the electron temperature provide more consistent results compared to those calibrated through photoionization models. Article in Journal/Newspaper sami Macquarie University Research Portal Monthly Notices of the Royal Astronomical Society 502 3 3357 3373 |
institution |
Open Polar |
collection |
Macquarie University Research Portal |
op_collection_id |
ftmacquarieunicr |
language |
English |
topic |
galaxies: abundances galaxies: fundamental parameters galaxies: ISM |
spellingShingle |
galaxies: abundances galaxies: fundamental parameters galaxies: ISM Poetrodjojo, Henry Groves, Brent Kewley, Lisa J. Sweet, Sarah M. Sanchez, Sebastian F. Medling, Anne M. López-Sánchez, Ángel R. Brough, Sarah Cortese, Luca van de Sande, Jesse Vaughan, Sam Richards, Samuel N. Bryant, Julia J. Croom, Scott M. Bland-Hawthorn, Joss Goodwin, Michael Lawrence, Jon S. Owers, Matt S. Scott, Nicholas The SAMI Galaxy Survey:reconciling strong emission line metallicity diagnostics using metallicity gradients |
topic_facet |
galaxies: abundances galaxies: fundamental parameters galaxies: ISM |
description |
We measure the gas-phase metallicity gradients of 248 galaxies selected from Data Release 2 of the SAMI Galaxy Survey. We demonstrate that there are large systematic discrepancies between the metallicity gradients derived using common strong emission line metallicity diagnostics. We determine which pairs of diagnostics have Spearman's rank coefficients greater than 0.6 and provide linear conversions to allow the accurate comparison of metallicity gradients derived using different strong emission line diagnostics. For galaxies within the mass range 8.5 <log (M/M ⊙ ) <11.0, we find discrepancies of up to 0.11 dex/R e between seven popular diagnostics in the metallicity gradient-mass relation. We find a suggestion of a break in the metallicity gradient-mass relation, where the slope shifts from negative to positive, occurs between 9.5 <log (M/M ⊙ ) <10.5 for the seven chosen diagnostics. Applying our conversions to the metallicity gradient-mass relation, we reduce the maximum dispersion from 0.11 dex/R e to 0.02 dex/R e . These conversions provide the most accurate method of converting metallicity gradients when key emission lines are unavailable. We find that diagnostics that share common sets of emission line ratios agree best, and that diagnostics calibrated through the electron temperature provide more consistent results compared to those calibrated through photoionization models. |
format |
Article in Journal/Newspaper |
author |
Poetrodjojo, Henry Groves, Brent Kewley, Lisa J. Sweet, Sarah M. Sanchez, Sebastian F. Medling, Anne M. López-Sánchez, Ángel R. Brough, Sarah Cortese, Luca van de Sande, Jesse Vaughan, Sam Richards, Samuel N. Bryant, Julia J. Croom, Scott M. Bland-Hawthorn, Joss Goodwin, Michael Lawrence, Jon S. Owers, Matt S. Scott, Nicholas |
author_facet |
Poetrodjojo, Henry Groves, Brent Kewley, Lisa J. Sweet, Sarah M. Sanchez, Sebastian F. Medling, Anne M. López-Sánchez, Ángel R. Brough, Sarah Cortese, Luca van de Sande, Jesse Vaughan, Sam Richards, Samuel N. Bryant, Julia J. Croom, Scott M. Bland-Hawthorn, Joss Goodwin, Michael Lawrence, Jon S. Owers, Matt S. Scott, Nicholas |
author_sort |
Poetrodjojo, Henry |
title |
The SAMI Galaxy Survey:reconciling strong emission line metallicity diagnostics using metallicity gradients |
title_short |
The SAMI Galaxy Survey:reconciling strong emission line metallicity diagnostics using metallicity gradients |
title_full |
The SAMI Galaxy Survey:reconciling strong emission line metallicity diagnostics using metallicity gradients |
title_fullStr |
The SAMI Galaxy Survey:reconciling strong emission line metallicity diagnostics using metallicity gradients |
title_full_unstemmed |
The SAMI Galaxy Survey:reconciling strong emission line metallicity diagnostics using metallicity gradients |
title_sort |
sami galaxy survey:reconciling strong emission line metallicity diagnostics using metallicity gradients |
publishDate |
2021 |
url |
https://researchers.mq.edu.au/en/publications/6df6c2f1-967b-48ee-ada1-91252c6e63f8 https://doi.org/10.1093/mnras/stab205 https://research-management.mq.edu.au/ws/files/168199791/167728476.pdf http://purl.org/au-research/grants/arc/FT140100255 http://www.scopus.com/inward/record.url?scp=85105040693&partnerID=8YFLogxK |
genre |
sami |
genre_facet |
sami |
op_source |
Poetrodjojo , H , Groves , B , Kewley , L J , Sweet , S M , Sanchez , S F , Medling , A M , López-Sánchez , Á R , Brough , S , Cortese , L , van de Sande , J , Vaughan , S , Richards , S N , Bryant , J J , Croom , S M , Bland-Hawthorn , J , Goodwin , M , Lawrence , J S , Owers , M S & Scott , N 2021 , ' The SAMI Galaxy Survey : reconciling strong emission line metallicity diagnostics using metallicity gradients ' , Monthly Notices of the Royal Astronomical Society , vol. 502 , no. 3 , pp. 3357-3373 . https://doi.org/10.1093/mnras/stab205 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1093/mnras/stab205 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
502 |
container_issue |
3 |
container_start_page |
3357 |
op_container_end_page |
3373 |
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1802649671143784448 |