The SAMI Galaxy Survey: the link between [α/Fe] and kinematic morphology
ABSTRACT We explore a sample of 1492 galaxies with measurements of the mean stellar population properties and the spin parameter proxy, $\lambda _{R_{\rm {e}}}$, drawn from the SAMI Galaxy Survey. We fit a global $[\alpha /\rm {Fe}]$–σ relation, finding that ${[\alpha /\rm {Fe}]}=(0.395\pm 0.010)\rm...
Published in: | Monthly Notices of the Royal Astronomical Society |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Oxford University Press (OUP)
2022
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1093/mnras/stac1221 https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stac1221/43520817/stac1221.pdf https://academic.oup.com/mnras/article-pdf/513/4/5076/43802480/stac1221.pdf |
id |
croxfordunivpr:10.1093/mnras/stac1221 |
---|---|
record_format |
openpolar |
spelling |
croxfordunivpr:10.1093/mnras/stac1221 2024-09-15T18:33:23+00:00 The SAMI Galaxy Survey: the link between [α/Fe] and kinematic morphology Watson, Peter J Davies, Roger L van de Sande, Jesse Brough, Sarah Croom, Scott M D’Eugenio, Francesco Glazebrook, Karl Groves, Brent López-Sánchez, Ángel R Scott, Nicholas Vaughan, Sam P Walcher, C Jakob Bland-Hawthorn, Joss Bryant, Julia J Goodwin, Michael Lawrence, Jon S Lorente, Nuria P F Owers, Matt S Richards, Samuel 2022 http://dx.doi.org/10.1093/mnras/stac1221 https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stac1221/43520817/stac1221.pdf https://academic.oup.com/mnras/article-pdf/513/4/5076/43802480/stac1221.pdf en eng Oxford University Press (OUP) https://creativecommons.org/licenses/by/4.0/ Monthly Notices of the Royal Astronomical Society volume 513, issue 4, page 5076-5087 ISSN 0035-8711 1365-2966 journal-article 2022 croxfordunivpr https://doi.org/10.1093/mnras/stac1221 2024-07-15T04:23:52Z ABSTRACT We explore a sample of 1492 galaxies with measurements of the mean stellar population properties and the spin parameter proxy, $\lambda _{R_{\rm {e}}}$, drawn from the SAMI Galaxy Survey. We fit a global $[\alpha /\rm {Fe}]$–σ relation, finding that ${[\alpha /\rm {Fe}]}=(0.395\pm 0.010)\rm {log}_{10}(\sigma)-(0.627\pm 0.002)$. We observe an anti-correlation between the residuals $\Delta [\alpha /\rm {Fe}]$ and the inclination-corrected $\lambda _{\, R_{\rm {e}}}^{\rm {\, eo}}$, which can be expressed as ${\Delta [\alpha /\rm {Fe}]}=(-0.057\pm 0.008){\lambda _{\, R_{\rm {e}}}^{\rm {\, eo}}}+(0.020\pm 0.003)$. The anti-correlation appears to be driven by star-forming galaxies, with a gradient of ${\Delta [\alpha /\rm {Fe}]}\sim (-0.121\pm 0.015){\lambda _{\, R_{\rm {e}}}^{\rm {\, eo}}}$, although a weak relationship persists for the subsample of galaxies for which star formation has been quenched. We take this to be confirmation that disc-dominated galaxies have an extended duration of star formation. At a reference velocity dispersion of 200 km s−1, we estimate an increase in half-mass formation time from ∼0.5 Gyr to ∼1.2 Gyr from low- to high-$\lambda _{\, R_{\rm {e}}}^{\rm {\, eo}}$ galaxies. Slow rotators do not appear to fit these trends. Their residual α-enhancement is indistinguishable from other galaxies with ${\lambda _{\, R_{\rm {e}}}^{\rm {\, eo}}}\lessapprox 0.4$, despite being both larger and more massive. This result shows that galaxies with ${\lambda _{\, R_{\rm {e}}}^{\rm {\, eo}}}\lessapprox 0.4$ experience a similar range of star formation histories, despite their different physical structure and angular momentum. Article in Journal/Newspaper sami Oxford University Press Monthly Notices of the Royal Astronomical Society 513 4 5076 5087 |
institution |
Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
description |
ABSTRACT We explore a sample of 1492 galaxies with measurements of the mean stellar population properties and the spin parameter proxy, $\lambda _{R_{\rm {e}}}$, drawn from the SAMI Galaxy Survey. We fit a global $[\alpha /\rm {Fe}]$–σ relation, finding that ${[\alpha /\rm {Fe}]}=(0.395\pm 0.010)\rm {log}_{10}(\sigma)-(0.627\pm 0.002)$. We observe an anti-correlation between the residuals $\Delta [\alpha /\rm {Fe}]$ and the inclination-corrected $\lambda _{\, R_{\rm {e}}}^{\rm {\, eo}}$, which can be expressed as ${\Delta [\alpha /\rm {Fe}]}=(-0.057\pm 0.008){\lambda _{\, R_{\rm {e}}}^{\rm {\, eo}}}+(0.020\pm 0.003)$. The anti-correlation appears to be driven by star-forming galaxies, with a gradient of ${\Delta [\alpha /\rm {Fe}]}\sim (-0.121\pm 0.015){\lambda _{\, R_{\rm {e}}}^{\rm {\, eo}}}$, although a weak relationship persists for the subsample of galaxies for which star formation has been quenched. We take this to be confirmation that disc-dominated galaxies have an extended duration of star formation. At a reference velocity dispersion of 200 km s−1, we estimate an increase in half-mass formation time from ∼0.5 Gyr to ∼1.2 Gyr from low- to high-$\lambda _{\, R_{\rm {e}}}^{\rm {\, eo}}$ galaxies. Slow rotators do not appear to fit these trends. Their residual α-enhancement is indistinguishable from other galaxies with ${\lambda _{\, R_{\rm {e}}}^{\rm {\, eo}}}\lessapprox 0.4$, despite being both larger and more massive. This result shows that galaxies with ${\lambda _{\, R_{\rm {e}}}^{\rm {\, eo}}}\lessapprox 0.4$ experience a similar range of star formation histories, despite their different physical structure and angular momentum. |
format |
Article in Journal/Newspaper |
author |
Watson, Peter J Davies, Roger L van de Sande, Jesse Brough, Sarah Croom, Scott M D’Eugenio, Francesco Glazebrook, Karl Groves, Brent López-Sánchez, Ángel R Scott, Nicholas Vaughan, Sam P Walcher, C Jakob Bland-Hawthorn, Joss Bryant, Julia J Goodwin, Michael Lawrence, Jon S Lorente, Nuria P F Owers, Matt S Richards, Samuel |
spellingShingle |
Watson, Peter J Davies, Roger L van de Sande, Jesse Brough, Sarah Croom, Scott M D’Eugenio, Francesco Glazebrook, Karl Groves, Brent López-Sánchez, Ángel R Scott, Nicholas Vaughan, Sam P Walcher, C Jakob Bland-Hawthorn, Joss Bryant, Julia J Goodwin, Michael Lawrence, Jon S Lorente, Nuria P F Owers, Matt S Richards, Samuel The SAMI Galaxy Survey: the link between [α/Fe] and kinematic morphology |
author_facet |
Watson, Peter J Davies, Roger L van de Sande, Jesse Brough, Sarah Croom, Scott M D’Eugenio, Francesco Glazebrook, Karl Groves, Brent López-Sánchez, Ángel R Scott, Nicholas Vaughan, Sam P Walcher, C Jakob Bland-Hawthorn, Joss Bryant, Julia J Goodwin, Michael Lawrence, Jon S Lorente, Nuria P F Owers, Matt S Richards, Samuel |
author_sort |
Watson, Peter J |
title |
The SAMI Galaxy Survey: the link between [α/Fe] and kinematic morphology |
title_short |
The SAMI Galaxy Survey: the link between [α/Fe] and kinematic morphology |
title_full |
The SAMI Galaxy Survey: the link between [α/Fe] and kinematic morphology |
title_fullStr |
The SAMI Galaxy Survey: the link between [α/Fe] and kinematic morphology |
title_full_unstemmed |
The SAMI Galaxy Survey: the link between [α/Fe] and kinematic morphology |
title_sort |
sami galaxy survey: the link between [α/fe] and kinematic morphology |
publisher |
Oxford University Press (OUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1093/mnras/stac1221 https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stac1221/43520817/stac1221.pdf https://academic.oup.com/mnras/article-pdf/513/4/5076/43802480/stac1221.pdf |
genre |
sami |
genre_facet |
sami |
op_source |
Monthly Notices of the Royal Astronomical Society volume 513, issue 4, page 5076-5087 ISSN 0035-8711 1365-2966 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1093/mnras/stac1221 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
513 |
container_issue |
4 |
container_start_page |
5076 |
op_container_end_page |
5087 |
_version_ |
1810475089510006784 |