Data from : The SAMI Galaxy Survey: reconciling strong emission line metallicity diagnostics using metallicity gradients
Associated Persons Henry Poetrodjojo (Creator); Lisa J. Kewley (Creator); Sarah M. Sweet (Creator); Sebastian F. Sanchez (Creator); Anne M. Medling (Creator); Ángel R. López-Sánchez (Creator); Sarah Brough (Creator); Jesse Van De Sande (Creator); Sam P. Vaughan (Creator); Samuel N. Richards (Creator...
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The University of Western Australia
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Online Access: | https://researchdata.edu.au/data-the-sami-metallicity-gradients/1702887 https://doi.org/10.1093/mnras/stab205 |
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ftands:oai:ands.org.au::1702887 2023-11-12T04:25:37+01:00 Data from : The SAMI Galaxy Survey: reconciling strong emission line metallicity diagnostics using metallicity gradients Brent Groves (Creator) Intl Centre for Radio Astronomy Research (ICRAR) (isManagedBy) Luca Cortese (Creator) https://researchdata.edu.au/data-the-sami-metallicity-gradients/1702887 https://doi.org/10.1093/mnras/stab205 unknown The University of Western Australia https://researchdata.edu.au/data-the-sami-metallicity-gradients/1702887 c7573402-72c0-4e54-81ce-152d3655975a doi:10.1093/mnras/stab205 University of Western Australia dataset ftands https://doi.org/10.1093/mnras/stab205 2023-10-16T22:24:50Z Associated Persons Henry Poetrodjojo (Creator); Lisa J. Kewley (Creator); Sarah M. Sweet (Creator); Sebastian F. Sanchez (Creator); Anne M. Medling (Creator); Ángel R. López-Sánchez (Creator); Sarah Brough (Creator); Jesse Van De Sande (Creator); Sam P. Vaughan (Creator); Samuel N. Richards (Creator); Julia J. Bryant (Creator); Scott M. Croom (Creator); Joss Bland-Hawthorn (Creator); Michael Goodwin (Creator); Jon S. Lawrence (Creator); Matt S. Owers (Creator); Nicholas Scott (Creator) 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/Re 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/Re to 0.02 dex/Re. 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. Dataset sami Research Data Australia (Australian National Data Service - ANDS) Bryant ENVELOPE(-60.942,-60.942,-71.236,-71.236) Goodwin ENVELOPE(-62.833,-62.833,-65.100,-65.100) Sande ENVELOPE(7.527,7.527,62.631,62.631) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
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ftands |
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unknown |
description |
Associated Persons Henry Poetrodjojo (Creator); Lisa J. Kewley (Creator); Sarah M. Sweet (Creator); Sebastian F. Sanchez (Creator); Anne M. Medling (Creator); Ángel R. López-Sánchez (Creator); Sarah Brough (Creator); Jesse Van De Sande (Creator); Sam P. Vaughan (Creator); Samuel N. Richards (Creator); Julia J. Bryant (Creator); Scott M. Croom (Creator); Joss Bland-Hawthorn (Creator); Michael Goodwin (Creator); Jon S. Lawrence (Creator); Matt S. Owers (Creator); Nicholas Scott (Creator) 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/Re 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/Re to 0.02 dex/Re. 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. |
author2 |
Brent Groves (Creator) Intl Centre for Radio Astronomy Research (ICRAR) (isManagedBy) Luca Cortese (Creator) |
format |
Dataset |
title |
Data from : The SAMI Galaxy Survey: reconciling strong emission line metallicity diagnostics using metallicity gradients |
spellingShingle |
Data from : The SAMI Galaxy Survey: reconciling strong emission line metallicity diagnostics using metallicity gradients |
title_short |
Data from : The SAMI Galaxy Survey: reconciling strong emission line metallicity diagnostics using metallicity gradients |
title_full |
Data from : The SAMI Galaxy Survey: reconciling strong emission line metallicity diagnostics using metallicity gradients |
title_fullStr |
Data from : The SAMI Galaxy Survey: reconciling strong emission line metallicity diagnostics using metallicity gradients |
title_full_unstemmed |
Data from : The SAMI Galaxy Survey: reconciling strong emission line metallicity diagnostics using metallicity gradients |
title_sort |
data from : the sami galaxy survey: reconciling strong emission line metallicity diagnostics using metallicity gradients |
publisher |
The University of Western Australia |
url |
https://researchdata.edu.au/data-the-sami-metallicity-gradients/1702887 https://doi.org/10.1093/mnras/stab205 |
long_lat |
ENVELOPE(-60.942,-60.942,-71.236,-71.236) ENVELOPE(-62.833,-62.833,-65.100,-65.100) ENVELOPE(7.527,7.527,62.631,62.631) |
geographic |
Bryant Goodwin Sande |
geographic_facet |
Bryant Goodwin Sande |
genre |
sami |
genre_facet |
sami |
op_source |
University of Western Australia |
op_relation |
https://researchdata.edu.au/data-the-sami-metallicity-gradients/1702887 c7573402-72c0-4e54-81ce-152d3655975a doi:10.1093/mnras/stab205 |
op_doi |
https://doi.org/10.1093/mnras/stab205 |
_version_ |
1782339767934910464 |