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 photometric measurements, and treating luminosity as the dependent variable, the FP has coefficients...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Blackwell Publishing Ltd
2023
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Online Access: | http://hdl.handle.net/1885/287637 https://doi.org/10.1093/mnras/stab1146 https://openresearch-repository.anu.edu.au/bitstream/1885/287637/3/stab1146.pdf.jpg |
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/287637 2023-05-15T18:11:26+02:00 The SAMI Galaxy Survey: Stellar population and structural trends across the Fundamental Plane D'Eugenio, Francesco Colless, Matthew Scott, Nicholas Wel, Arjen van der Davies, Roger L van de Sande, Jesse Sweet, Sarah M Oh, Sree Groves, B. Sharp, Rob Owers, Matthew Bland-Hawthorn, Joss Croom, Scott M Brough, Sarah 2023-03-28T04:39:39Z application/pdf http://hdl.handle.net/1885/287637 https://doi.org/10.1093/mnras/stab1146 https://openresearch-repository.anu.edu.au/bitstream/1885/287637/3/stab1146.pdf.jpg en_AU eng Blackwell Publishing Ltd http://purl.org/au-research/grants/arc/CE110001020 http://purl.org/au-research/grants/arc/DE190100375 http://purl.org/au-research/grants/arc/CE170100013 http://purl.org/au-research/grants/arc/DE200100461 http://purl.org/au-research/grants/arc/FT140101166 http://purl.org/au-research/grants/arc/FT180100231 0035-8711 http://hdl.handle.net/1885/287637 doi:10.1093/mnras/stab1146 https://openresearch-repository.anu.edu.au/bitstream/1885/287637/3/stab1146.pdf.jpg © 2021 The authors Monthly Notices of the Royal Astronomical Society galaxies: elliptical and lenticular cD galaxies: evolution galaxies: formation galaxies: spiral galaxies: stellar content Journal article 2023 ftanucanberra https://doi.org/10.1093/mnras/stab1146 2023-04-03T22:15:41Z 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 photometric measurements, and treating luminosity as the dependent variable, the FP has coefficients a = 1.294 ± 0.039, b = 0.912 ± 0.025, and zero-point c = 7.067 ± 0.078. We leverage the high signal-to-noise ratio 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 (8σ 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⋆) 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⋆. This correlation implies that part of the FP scatter is due to the broad age and ϒ⋆ distribution at any given surface mass density. Using virial mass and ϒ⋆, 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 per cent) of the FP scatter, on their own they do not explain the observed tilt of the FP away from the virial plane. Article in Journal/Newspaper sami Australian National University: ANU Digital Collections Zero Point ENVELOPE(-37.150,-37.150,-54.117,-54.117) Monthly Notices of the Royal Astronomical Society 504 4 5098 5130 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
English |
topic |
galaxies: elliptical and lenticular cD galaxies: evolution galaxies: formation galaxies: spiral galaxies: stellar content |
spellingShingle |
galaxies: elliptical and lenticular cD galaxies: evolution galaxies: formation galaxies: spiral galaxies: stellar content D'Eugenio, Francesco Colless, Matthew Scott, Nicholas Wel, Arjen van der Davies, Roger L van de Sande, Jesse Sweet, Sarah M Oh, Sree Groves, B. Sharp, Rob Owers, Matthew Bland-Hawthorn, Joss Croom, Scott M Brough, Sarah The SAMI Galaxy Survey: Stellar population and structural trends across the Fundamental Plane |
topic_facet |
galaxies: elliptical and lenticular cD galaxies: evolution galaxies: formation galaxies: spiral galaxies: stellar content |
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 photometric measurements, and treating luminosity as the dependent variable, the FP has coefficients a = 1.294 ± 0.039, b = 0.912 ± 0.025, and zero-point c = 7.067 ± 0.078. We leverage the high signal-to-noise ratio 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 (8σ 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⋆) 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⋆. This correlation implies that part of the FP scatter is due to the broad age and ϒ⋆ distribution at any given surface mass density. Using virial mass and ϒ⋆, 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 per cent) of the FP scatter, on their own they do not explain the observed tilt of the FP away from the virial plane. |
format |
Article in Journal/Newspaper |
author |
D'Eugenio, Francesco Colless, Matthew Scott, Nicholas Wel, Arjen van der Davies, Roger L van de Sande, Jesse Sweet, Sarah M Oh, Sree Groves, B. Sharp, Rob Owers, Matthew Bland-Hawthorn, Joss Croom, Scott M Brough, Sarah |
author_facet |
D'Eugenio, Francesco Colless, Matthew Scott, Nicholas Wel, Arjen van der Davies, Roger L van de Sande, Jesse Sweet, Sarah M Oh, Sree Groves, B. Sharp, Rob Owers, Matthew Bland-Hawthorn, Joss Croom, Scott M Brough, Sarah |
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 |
Blackwell Publishing Ltd |
publishDate |
2023 |
url |
http://hdl.handle.net/1885/287637 https://doi.org/10.1093/mnras/stab1146 https://openresearch-repository.anu.edu.au/bitstream/1885/287637/3/stab1146.pdf.jpg |
long_lat |
ENVELOPE(-37.150,-37.150,-54.117,-54.117) |
geographic |
Zero Point |
geographic_facet |
Zero Point |
genre |
sami |
genre_facet |
sami |
op_source |
Monthly Notices of the Royal Astronomical Society |
op_relation |
http://purl.org/au-research/grants/arc/CE110001020 http://purl.org/au-research/grants/arc/DE190100375 http://purl.org/au-research/grants/arc/CE170100013 http://purl.org/au-research/grants/arc/DE200100461 http://purl.org/au-research/grants/arc/FT140101166 http://purl.org/au-research/grants/arc/FT180100231 0035-8711 http://hdl.handle.net/1885/287637 doi:10.1093/mnras/stab1146 https://openresearch-repository.anu.edu.au/bitstream/1885/287637/3/stab1146.pdf.jpg |
op_rights |
© 2021 The authors |
op_doi |
https://doi.org/10.1093/mnras/stab1146 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
504 |
container_issue |
4 |
container_start_page |
5098 |
op_container_end_page |
5130 |
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1766184087945478144 |