Evolution in the orbital structure of quiescent galaxies from MAGPI, LEGA-C, and SAMI surveys: direct evidence for merger-driven growth over the last 7 Gyr
We present the first study of spatially integrated higher-order stellar kinematics over cosmic time. We use deep rest-frame optical spectroscopy of quiescent galaxies at redshifts z = 0.05, 0.3, and 0.8 from the SAMI, MAGPI, and LEGA-C surveys to measure the excess kurtosis h4 of the stellar velocit...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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Format: | Article in Journal/Newspaper |
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Oxford University Press (OUP)
2023
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Online Access: | http://hdl.handle.net/1959.3/475459 https://doi.org/10.1093/mnras/stad800 |
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ftswinburne:tle:0398cb48-363c-478b-9acb-d037d7bd24d7:28f49f06-0da8-44be-9edc-ad1dd0a9c582:1 2023-11-05T03:44:49+01:00 Evolution in the orbital structure of quiescent galaxies from MAGPI, LEGA-C, and SAMI surveys: direct evidence for merger-driven growth over the last 7 Gyr D'Eugenio, Francesco van der Wel, Arjen Piotrowska, Joanna M. Bezanson, Rachel Taylor, Edward N. van de Sande, Jesse Baker, William M. Bell, Eric F. Bellstedt, Sabine Bland-Hawthorn, Joss Bluck, Asa F. L. Brough, Sarah Bryant, Julia J. Colless, Matthew Cortese, Luca Croom, Scott M. Derkenne, Caro van Dokkum, Pieter Fisher, Deanne Foster, Caroline Gallazzi, Anna de Graaff, Anna Groves, Brent van Houdt, Josha del P. Lagos, Claudia Looser, Tobias J. Maiolino, Roberto Maseda, Michael Mendel, J. Trevor Nersesian, Angelos Pacifici, Camilla Poci, Adriano Remus, Rhea-Silvia Sweet, Sarah M. Thater, Sabine Tran, Kim-Vy Übler, Hannah Valenzuela, Lucas M. Wisnioski, Emily Zibetti, Stefano Swinburne University of Technology 2023 http://hdl.handle.net/1959.3/475459 https://doi.org/10.1093/mnras/stad800 unknown Oxford University Press (OUP) http://purl.org/au-research/grants/arc/FT140101166 http://purl.org/au-research/grants/arc/FT21010016 http://purl.org/au-research/grants/arc/DE200100461 http://purl.org/au-research/grants/arc/FT180100231 http://hdl.handle.net/1959.3/475459 https://doi.org/10.1093/mnras/stad800 Copyright © 2023 Monthly Notices of the Royal Astronomical Society, Vol. 525, no. 2 (Aug 2023), pp. 2789-2805 Journal article 2023 ftswinburne https://doi.org/10.1093/mnras/stad800 2023-10-09T22:27:37Z We present the first study of spatially integrated higher-order stellar kinematics over cosmic time. We use deep rest-frame optical spectroscopy of quiescent galaxies at redshifts z = 0.05, 0.3, and 0.8 from the SAMI, MAGPI, and LEGA-C surveys to measure the excess kurtosis h4 of the stellar velocity distribution, the latter parametrized as a Gauss-Hermite series. Conservatively using a redshift-independent cut in stellar mass () and matching the stellar-mass distributions of our samples, we find 7σ evidence of h4 increasing with cosmic time, from a median value of 0.019 ± 0.002 at z = 0.8 to 0.059 ± 0.004 at z = 0.06. Alternatively, we use a physically motivated sample selection based on the mass distribution of the progenitors of local quiescent galaxies as inferred from numerical simulations; in this case, we find 10σ evidence. This evolution suggests that, over the last 7 Gyr, there has been a gradual decrease in the rotation-to-dispersion ratio and an increase in the radial anisotropy of the stellar velocity distribution, qualitatively consistent with accretion of gas-poor satellites. These findings demonstrate that massive galaxies continue to accrete mass and increase their dispersion support after becoming quiescent. Article in Journal/Newspaper sami Swinburne University of Technology: Swinburne Research Bank Monthly Notices of the Royal Astronomical Society 525 2 2789 2805 |
institution |
Open Polar |
collection |
Swinburne University of Technology: Swinburne Research Bank |
op_collection_id |
ftswinburne |
language |
unknown |
description |
We present the first study of spatially integrated higher-order stellar kinematics over cosmic time. We use deep rest-frame optical spectroscopy of quiescent galaxies at redshifts z = 0.05, 0.3, and 0.8 from the SAMI, MAGPI, and LEGA-C surveys to measure the excess kurtosis h4 of the stellar velocity distribution, the latter parametrized as a Gauss-Hermite series. Conservatively using a redshift-independent cut in stellar mass () and matching the stellar-mass distributions of our samples, we find 7σ evidence of h4 increasing with cosmic time, from a median value of 0.019 ± 0.002 at z = 0.8 to 0.059 ± 0.004 at z = 0.06. Alternatively, we use a physically motivated sample selection based on the mass distribution of the progenitors of local quiescent galaxies as inferred from numerical simulations; in this case, we find 10σ evidence. This evolution suggests that, over the last 7 Gyr, there has been a gradual decrease in the rotation-to-dispersion ratio and an increase in the radial anisotropy of the stellar velocity distribution, qualitatively consistent with accretion of gas-poor satellites. These findings demonstrate that massive galaxies continue to accrete mass and increase their dispersion support after becoming quiescent. |
author2 |
Swinburne University of Technology |
format |
Article in Journal/Newspaper |
author |
D'Eugenio, Francesco van der Wel, Arjen Piotrowska, Joanna M. Bezanson, Rachel Taylor, Edward N. van de Sande, Jesse Baker, William M. Bell, Eric F. Bellstedt, Sabine Bland-Hawthorn, Joss Bluck, Asa F. L. Brough, Sarah Bryant, Julia J. Colless, Matthew Cortese, Luca Croom, Scott M. Derkenne, Caro van Dokkum, Pieter Fisher, Deanne Foster, Caroline Gallazzi, Anna de Graaff, Anna Groves, Brent van Houdt, Josha del P. Lagos, Claudia Looser, Tobias J. Maiolino, Roberto Maseda, Michael Mendel, J. Trevor Nersesian, Angelos Pacifici, Camilla Poci, Adriano Remus, Rhea-Silvia Sweet, Sarah M. Thater, Sabine Tran, Kim-Vy Übler, Hannah Valenzuela, Lucas M. Wisnioski, Emily Zibetti, Stefano |
spellingShingle |
D'Eugenio, Francesco van der Wel, Arjen Piotrowska, Joanna M. Bezanson, Rachel Taylor, Edward N. van de Sande, Jesse Baker, William M. Bell, Eric F. Bellstedt, Sabine Bland-Hawthorn, Joss Bluck, Asa F. L. Brough, Sarah Bryant, Julia J. Colless, Matthew Cortese, Luca Croom, Scott M. Derkenne, Caro van Dokkum, Pieter Fisher, Deanne Foster, Caroline Gallazzi, Anna de Graaff, Anna Groves, Brent van Houdt, Josha del P. Lagos, Claudia Looser, Tobias J. Maiolino, Roberto Maseda, Michael Mendel, J. Trevor Nersesian, Angelos Pacifici, Camilla Poci, Adriano Remus, Rhea-Silvia Sweet, Sarah M. Thater, Sabine Tran, Kim-Vy Übler, Hannah Valenzuela, Lucas M. Wisnioski, Emily Zibetti, Stefano Evolution in the orbital structure of quiescent galaxies from MAGPI, LEGA-C, and SAMI surveys: direct evidence for merger-driven growth over the last 7 Gyr |
author_facet |
D'Eugenio, Francesco van der Wel, Arjen Piotrowska, Joanna M. Bezanson, Rachel Taylor, Edward N. van de Sande, Jesse Baker, William M. Bell, Eric F. Bellstedt, Sabine Bland-Hawthorn, Joss Bluck, Asa F. L. Brough, Sarah Bryant, Julia J. Colless, Matthew Cortese, Luca Croom, Scott M. Derkenne, Caro van Dokkum, Pieter Fisher, Deanne Foster, Caroline Gallazzi, Anna de Graaff, Anna Groves, Brent van Houdt, Josha del P. Lagos, Claudia Looser, Tobias J. Maiolino, Roberto Maseda, Michael Mendel, J. Trevor Nersesian, Angelos Pacifici, Camilla Poci, Adriano Remus, Rhea-Silvia Sweet, Sarah M. Thater, Sabine Tran, Kim-Vy Übler, Hannah Valenzuela, Lucas M. Wisnioski, Emily Zibetti, Stefano |
author_sort |
D'Eugenio, Francesco |
title |
Evolution in the orbital structure of quiescent galaxies from MAGPI, LEGA-C, and SAMI surveys: direct evidence for merger-driven growth over the last 7 Gyr |
title_short |
Evolution in the orbital structure of quiescent galaxies from MAGPI, LEGA-C, and SAMI surveys: direct evidence for merger-driven growth over the last 7 Gyr |
title_full |
Evolution in the orbital structure of quiescent galaxies from MAGPI, LEGA-C, and SAMI surveys: direct evidence for merger-driven growth over the last 7 Gyr |
title_fullStr |
Evolution in the orbital structure of quiescent galaxies from MAGPI, LEGA-C, and SAMI surveys: direct evidence for merger-driven growth over the last 7 Gyr |
title_full_unstemmed |
Evolution in the orbital structure of quiescent galaxies from MAGPI, LEGA-C, and SAMI surveys: direct evidence for merger-driven growth over the last 7 Gyr |
title_sort |
evolution in the orbital structure of quiescent galaxies from magpi, lega-c, and sami surveys: direct evidence for merger-driven growth over the last 7 gyr |
publisher |
Oxford University Press (OUP) |
publishDate |
2023 |
url |
http://hdl.handle.net/1959.3/475459 https://doi.org/10.1093/mnras/stad800 |
genre |
sami |
genre_facet |
sami |
op_source |
Monthly Notices of the Royal Astronomical Society, Vol. 525, no. 2 (Aug 2023), pp. 2789-2805 |
op_relation |
http://purl.org/au-research/grants/arc/FT140101166 http://purl.org/au-research/grants/arc/FT21010016 http://purl.org/au-research/grants/arc/DE200100461 http://purl.org/au-research/grants/arc/FT180100231 http://hdl.handle.net/1959.3/475459 https://doi.org/10.1093/mnras/stad800 |
op_rights |
Copyright © 2023 |
op_doi |
https://doi.org/10.1093/mnras/stad800 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
525 |
container_issue |
2 |
container_start_page |
2789 |
op_container_end_page |
2805 |
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1781705690970062848 |