The SAMI Galaxy Survey: reconciling strong emission line metallicity diagnostics using metallicity gradients

Henry Poetrodjojo; Brent Groves; Lisa J. Kewley; Sarah M. Sweet; Sebastian F. Sanchez; Anne M. Medling; Ángel R. López-Sánchez; Sarah Brough; Luca Cortese; Jesse van de Sande; Sam Vaughan; Samuel N. Richards; Julia J. Bryant; Scott M. Croom; Joss Bland-Hawthorn; Michael Goodwin; Jon S. Lawrence; Matt S. Owers; Nicholas Scott

doi:10.1093/mnras/stab205

The SAMI Galaxy Survey: reconciling strong emission line metallicity diagnostics using metallicity gradients

Henry Poetrodjojo, Brent Groves, Lisa J. Kewley, Sarah M. Sweet, Sebastian F. Sanchez, Anne M. Medling, Ángel R. López-Sánchez, Sarah Brough, Luca Cortese, Jesse van de Sande, Sam Vaughan, Samuel N. Richards, Julia J. Bryant, Scott M. Croom, Joss Bland-Hawthorn, Michael Goodwin, Jon S. Lawrence, Matt S. Owers, Nicholas Scott

International Centre for Radio Astronomy Research (ICRAR)

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Abstract

We measure the gas-phase metallicity gradients of 248 galaxies selectedfrom Data Release 2 of the SAMI Galaxy Survey. We demonstrate that thereare large systematic discrepancies between the metallicity gradientsderived using common strong emission line metallicity diagnostics. Wedetermine which pairs of diagnostics have Spearman's rank coefficientsgreater than 0.6 and provide linear conversions to allow the accuratecomparison of metallicity gradients derived using different strongemission line diagnostics. For galaxies within the mass range 8.5 <log (M/M⊙) <11.0, we find discrepancies of up to 0.11dex/Re between seven popular diagnostics in the metallicitygradient-mass relation. We find a suggestion of a break in themetallicity gradient-mass relation, where the slope shifts from negativeto positive, occurs between 9.5 <log (M/M⊙) <10.5for the seven chosen diagnostics. Applying our conversions to themetallicity gradient-mass relation, we reduce the maximum dispersionfrom 0.11 dex/Re to 0.02 dex/Re. These conversionsprovide the most accurate method of converting metallicity gradientswhen key emission lines are unavailable. We find that diagnostics thatshare common sets of emission line ratios agree best, and thatdiagnostics calibrated through the electron temperature provide moreconsistent results compared to those calibrated through photoionizationmodels.

Original language	English
Pages (from-to)	3357-3373
Journal	Monthly Notices of the Royal Astronomical Society
Volume	502
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stab205
Publication status	Published - 1 Apr 2021

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10.1093/mnras/stab205

The SAMI Galaxy Survey_reconcilingFinal published version, 2.23 MBLicence: Other

http://adsabs.harvard.edu/abs/2021MNRAS.502.3357P

Data from : The SAMI Galaxy Survey: reconciling strong emission line metallicity diagnostics using metallicity gradients
Poetrodjojo, H. (Creator), Groves, B. (Creator), Kewley, L. J. (Creator), Sweet, S. M. (Creator), Sanchez, S. F. (Creator), Medling, A. M. (Creator), López-Sánchez, Á. R. (Creator), Brough, S. (Creator), Cortese, L. (Creator), Van De Sande, J. (Creator), Vaughan, S. P. (Creator), Richards, S. N. (Creator), Bryant, J. J. (Creator), Croom, S. M. (Creator), Bland-Hawthorn, J. (Creator), Goodwin, M. (Creator), Lawrence, J. S. (Creator), Owers, M. S. (Creator) & Scott, N. (Creator), SAO/NASA Astrophysics Data System (ADS), Apr 2021
DOI: 10.1093/mnras/stab205, https://ui.adsabs.harvard.edu/abs/2021MNRAS.502.3357P/abstract and one more link, https://ui.adsabs.harvard.edu/link_gateway/2021MNRAS.502.3357P/SIMBAD (show fewer)
Dataset

1 Active

Beyond Appearance: revealing the physics of galaxy transformation
Cortese, L.
Australian Research Council
1/10/18 → 30/09/22
Project: Research

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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, 502(3), 3357-3373. https://doi.org/10.1093/mnras/stab205

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. In: Monthly Notices of the Royal Astronomical Society. 2021 ; Vol. 502, No. 3. pp. 3357-3373.

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title = "The SAMI Galaxy Survey: reconciling strong emission line metallicity diagnostics using metallicity gradients",

abstract = "We measure the gas-phase metallicity gradients of 248 galaxies selectedfrom Data Release 2 of the SAMI Galaxy Survey. We demonstrate that thereare large systematic discrepancies between the metallicity gradientsderived using common strong emission line metallicity diagnostics. Wedetermine which pairs of diagnostics have Spearman's rank coefficientsgreater than 0.6 and provide linear conversions to allow the accuratecomparison of metallicity gradients derived using different strongemission line diagnostics. For galaxies within the mass range 8.5 <log (M/M⊙) <11.0, we find discrepancies of up to 0.11dex/Re between seven popular diagnostics in the metallicitygradient-mass relation. We find a suggestion of a break in themetallicity gradient-mass relation, where the slope shifts from negativeto positive, occurs between 9.5 <log (M/M⊙) <10.5for the seven chosen diagnostics. Applying our conversions to themetallicity gradient-mass relation, we reduce the maximum dispersionfrom 0.11 dex/Re to 0.02 dex/Re. These conversionsprovide the most accurate method of converting metallicity gradientswhen key emission lines are unavailable. We find that diagnostics thatshare common sets of emission line ratios agree best, and thatdiagnostics calibrated through the electron temperature provide moreconsistent results compared to those calibrated through photoionizationmodels.",

keywords = "galaxies: abundances, galaxies: fundamental parameters, galaxies: ISM",

author = "Henry Poetrodjojo and Brent Groves and Kewley, {Lisa J.} and Sweet, {Sarah M.} and Sanchez, {Sebastian F.} and Medling, {Anne M.} and L{\'o}pez-S{\'a}nchez, {{\'A}ngel R.} and Sarah Brough and Luca Cortese and {van de Sande}, Jesse and Sam Vaughan and Richards, {Samuel N.} and Bryant, {Julia J.} and Croom, {Scott M.} and Joss Bland-Hawthorn and Michael Goodwin and Lawrence, {Jon S.} and Owers, {Matt S.} and Nicholas Scott",

year = "2021",

month = apr,

day = "1",

doi = "10.1093/mnras/stab205",

language = "English",

volume = "502",

pages = "3357--3373",

journal = "Monthly Notices of the Royal Astronomical Society",

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Poetrodjojo, H, Groves, B, Kewley, LJ, Sweet, SM, Sanchez, SF, Medling, AM, López-Sánchez, ÁR, Brough, S, Cortese, L, van de Sande, J, Vaughan, S, Richards, SN, Bryant, JJ, Croom, SM, Bland-Hawthorn, J, Goodwin, M, Lawrence, JS, Owers, MS & 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

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.

In: Monthly Notices of the Royal Astronomical Society, Vol. 502, No. 3, 01.04.2021, p. 3357-3373.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - The SAMI Galaxy Survey

T2 - reconciling strong emission line metallicity diagnostics using metallicity gradients

AU - Poetrodjojo, Henry

AU - Groves, Brent

AU - Kewley, Lisa J.

AU - Sweet, Sarah M.

AU - Sanchez, Sebastian F.

AU - Medling, Anne M.

AU - López-Sánchez, Ángel R.

AU - Brough, Sarah

AU - Cortese, Luca

AU - van de Sande, Jesse

AU - Vaughan, Sam

AU - Richards, Samuel N.

AU - Bryant, Julia J.

AU - Croom, Scott M.

AU - Bland-Hawthorn, Joss

AU - Goodwin, Michael

AU - Lawrence, Jon S.

AU - Owers, Matt S.

AU - Scott, Nicholas

PY - 2021/4/1

Y1 - 2021/4/1

N2 - We measure the gas-phase metallicity gradients of 248 galaxies selectedfrom Data Release 2 of the SAMI Galaxy Survey. We demonstrate that thereare large systematic discrepancies between the metallicity gradientsderived using common strong emission line metallicity diagnostics. Wedetermine which pairs of diagnostics have Spearman's rank coefficientsgreater than 0.6 and provide linear conversions to allow the accuratecomparison of metallicity gradients derived using different strongemission line diagnostics. For galaxies within the mass range 8.5 <log (M/M⊙) <11.0, we find discrepancies of up to 0.11dex/Re between seven popular diagnostics in the metallicitygradient-mass relation. We find a suggestion of a break in themetallicity gradient-mass relation, where the slope shifts from negativeto positive, occurs between 9.5 <log (M/M⊙) <10.5for the seven chosen diagnostics. Applying our conversions to themetallicity gradient-mass relation, we reduce the maximum dispersionfrom 0.11 dex/Re to 0.02 dex/Re. These conversionsprovide the most accurate method of converting metallicity gradientswhen key emission lines are unavailable. We find that diagnostics thatshare common sets of emission line ratios agree best, and thatdiagnostics calibrated through the electron temperature provide moreconsistent results compared to those calibrated through photoionizationmodels.

AB - We measure the gas-phase metallicity gradients of 248 galaxies selectedfrom Data Release 2 of the SAMI Galaxy Survey. We demonstrate that thereare large systematic discrepancies between the metallicity gradientsderived using common strong emission line metallicity diagnostics. Wedetermine which pairs of diagnostics have Spearman's rank coefficientsgreater than 0.6 and provide linear conversions to allow the accuratecomparison of metallicity gradients derived using different strongemission line diagnostics. For galaxies within the mass range 8.5 <log (M/M⊙) <11.0, we find discrepancies of up to 0.11dex/Re between seven popular diagnostics in the metallicitygradient-mass relation. We find a suggestion of a break in themetallicity gradient-mass relation, where the slope shifts from negativeto positive, occurs between 9.5 <log (M/M⊙) <10.5for the seven chosen diagnostics. Applying our conversions to themetallicity gradient-mass relation, we reduce the maximum dispersionfrom 0.11 dex/Re to 0.02 dex/Re. These conversionsprovide the most accurate method of converting metallicity gradientswhen key emission lines are unavailable. We find that diagnostics thatshare common sets of emission line ratios agree best, and thatdiagnostics calibrated through the electron temperature provide moreconsistent results compared to those calibrated through photoionizationmodels.

KW - galaxies: abundances

KW - galaxies: fundamental parameters

KW - galaxies: ISM

U2 - 10.1093/mnras/stab205

DO - 10.1093/mnras/stab205

M3 - Article

VL - 502

SP - 3357

EP - 3373

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 3

ER -

The SAMI Galaxy Survey: reconciling strong emission line metallicity diagnostics using metallicity gradients

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Data from : The SAMI Galaxy Survey: reconciling strong emission line metallicity diagnostics using metallicity gradients

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Beyond Appearance: revealing the physics of galaxy transformation

Cite this