The SAMI Galaxy Survey: stellar population and structural trends across the Fundamental Plane
We study the Fundamental Plane (FP) for a volume- and luminosity-limited sample of 560 early-type galaxies from the SAMI survey. Using r-band sizes and luminosities from new Multi-Gaussian Expansion (MGE) photometric measurements, and treating luminosity as the dependent variable, the FP has coeffic...
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ftdatacite:10.48550/arxiv.2104.10167 2023-05-15T18:11:25+02:00 The SAMI Galaxy Survey: stellar population and structural trends across the Fundamental Plane D'Eugenio, Francesco Colless, Matthew Scott, Nicholas van der Wel, Arjen Davies, Roger L. van de Sande, Jesse Sweet, Sarah M. Oh, Sree Groves, Brent Sharp, Rob Owers, Matt S. Bland-Hawthorn, Joss Croom, Scott M. Brough, Sarah Bryant, Julia J. Goodwin, Michael Lawrence, Jon S. Lorente, Nuria P. F. Richards, Samuel N. 2021 https://dx.doi.org/10.48550/arxiv.2104.10167 https://arxiv.org/abs/2104.10167 unknown arXiv https://dx.doi.org/10.1093/mnras/stab1146 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 2021 ftdatacite https://doi.org/10.48550/arxiv.2104.10167 https://doi.org/10.1093/mnras/stab1146 2022-03-10T14:24:23Z We study the Fundamental Plane (FP) for a volume- and luminosity-limited sample of 560 early-type galaxies from the SAMI survey. Using r-band sizes and luminosities from new Multi-Gaussian Expansion (MGE) photometric measurements, and treating luminosity as the dependent variable, the FP has coefficients a=1.294$\pm$0.039, b= 0.912$\pm$0.025, and zero-point c= 7.067$\pm$0.078. We leverage the high signal-to-noise of SAMI integral field spectroscopy, to determine how structural and stellar-population observables affect the scatter about the FP. The FP residuals correlate most strongly (8$σ$ significance) with luminosity-weighted simple-stellar-population (SSP) age. In contrast, the structural observables surface mass density, rotation-to-dispersion ratio, Sérsic index and projected shape all show little or no significant correlation. We connect the FP residuals to the empirical relation between age (or stellar mass-to-light ratio $Υ_\star$) and surface mass density, the best predictor of SSP age amongst parameters based on FP observables. We show that the FP residuals (anti-)correlate with the residuals of the relation between surface density and $Υ_\star$. This correlation implies that part of the FP scatter is due to the broad age and $Υ_\star$ distribution at any given surface mass density. Using virial mass and $Υ_\star$ we construct a simulated FP and compare it to the observed FP. We find that, while the empirical relations between observed stellar population relations and FP observables are responsible for most (75%) of the FP scatter, on their own they do not explain the observed tilt of the FP away from the virial plane. : 36 pages, 23 figures Article in Journal/Newspaper sami DataCite Metadata Store (German National Library of Science and Technology) Zero Point ENVELOPE(-37.150,-37.150,-54.117,-54.117) |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
spellingShingle |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences D'Eugenio, Francesco Colless, Matthew Scott, Nicholas van der Wel, Arjen Davies, Roger L. van de Sande, Jesse Sweet, Sarah M. Oh, Sree Groves, Brent Sharp, Rob Owers, Matt S. Bland-Hawthorn, Joss Croom, Scott M. Brough, Sarah Bryant, Julia J. Goodwin, Michael Lawrence, Jon S. Lorente, Nuria P. F. Richards, Samuel N. The SAMI Galaxy Survey: stellar population and structural trends across the Fundamental Plane |
topic_facet |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
description |
We study the Fundamental Plane (FP) for a volume- and luminosity-limited sample of 560 early-type galaxies from the SAMI survey. Using r-band sizes and luminosities from new Multi-Gaussian Expansion (MGE) photometric measurements, and treating luminosity as the dependent variable, the FP has coefficients a=1.294$\pm$0.039, b= 0.912$\pm$0.025, and zero-point c= 7.067$\pm$0.078. We leverage the high signal-to-noise of SAMI integral field spectroscopy, to determine how structural and stellar-population observables affect the scatter about the FP. The FP residuals correlate most strongly (8$σ$ significance) with luminosity-weighted simple-stellar-population (SSP) age. In contrast, the structural observables surface mass density, rotation-to-dispersion ratio, Sérsic index and projected shape all show little or no significant correlation. We connect the FP residuals to the empirical relation between age (or stellar mass-to-light ratio $Υ_\star$) and surface mass density, the best predictor of SSP age amongst parameters based on FP observables. We show that the FP residuals (anti-)correlate with the residuals of the relation between surface density and $Υ_\star$. This correlation implies that part of the FP scatter is due to the broad age and $Υ_\star$ distribution at any given surface mass density. Using virial mass and $Υ_\star$ we construct a simulated FP and compare it to the observed FP. We find that, while the empirical relations between observed stellar population relations and FP observables are responsible for most (75%) of the FP scatter, on their own they do not explain the observed tilt of the FP away from the virial plane. : 36 pages, 23 figures |
format |
Article in Journal/Newspaper |
author |
D'Eugenio, Francesco Colless, Matthew Scott, Nicholas van der Wel, Arjen Davies, Roger L. van de Sande, Jesse Sweet, Sarah M. Oh, Sree Groves, Brent Sharp, Rob Owers, Matt S. Bland-Hawthorn, Joss Croom, Scott M. Brough, Sarah Bryant, Julia J. Goodwin, Michael Lawrence, Jon S. Lorente, Nuria P. F. Richards, Samuel N. |
author_facet |
D'Eugenio, Francesco Colless, Matthew Scott, Nicholas van der Wel, Arjen Davies, Roger L. van de Sande, Jesse Sweet, Sarah M. Oh, Sree Groves, Brent Sharp, Rob Owers, Matt S. Bland-Hawthorn, Joss Croom, Scott M. Brough, Sarah Bryant, Julia J. Goodwin, Michael Lawrence, Jon S. Lorente, Nuria P. F. Richards, Samuel N. |
author_sort |
D'Eugenio, Francesco |
title |
The SAMI Galaxy Survey: stellar population and structural trends across the Fundamental Plane |
title_short |
The SAMI Galaxy Survey: stellar population and structural trends across the Fundamental Plane |
title_full |
The SAMI Galaxy Survey: stellar population and structural trends across the Fundamental Plane |
title_fullStr |
The SAMI Galaxy Survey: stellar population and structural trends across the Fundamental Plane |
title_full_unstemmed |
The SAMI Galaxy Survey: stellar population and structural trends across the Fundamental Plane |
title_sort |
sami galaxy survey: stellar population and structural trends across the fundamental plane |
publisher |
arXiv |
publishDate |
2021 |
url |
https://dx.doi.org/10.48550/arxiv.2104.10167 https://arxiv.org/abs/2104.10167 |
long_lat |
ENVELOPE(-37.150,-37.150,-54.117,-54.117) |
geographic |
Zero Point |
geographic_facet |
Zero Point |
genre |
sami |
genre_facet |
sami |
op_relation |
https://dx.doi.org/10.1093/mnras/stab1146 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.2104.10167 https://doi.org/10.1093/mnras/stab1146 |
_version_ |
1766184075457986560 |