The SAMI Galaxy Survey: satellite galaxies undergo little structural change during their quenching phase
At fixed stellar mass, satellite galaxies show higher passive fractions than centrals, suggesting that environment is directly quenching their star formation. Here, we investigate whether satellite quenching is accompanied by changes in stellar spin (quantified by the ratio of the rotational to disp...
Published in: | Monthly Notices of the Royal Astronomical Society |
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:e1da65a 2023-05-15T18:11:29+02:00 The SAMI Galaxy Survey: satellite galaxies undergo little structural change during their quenching phase Cortese, L. van de Sande, J. Lagos, C. P. Catinella, B. Davies, L. J. M. Croom, S. M. Brough, S. Bryant, J. J. Lawrence, J. S. Owers, M. S. Richards, S. N. Sweet, S. M. Bland-Hawthorn, J. 2019-05-01 https://espace.library.uq.edu.au/view/UQ:e1da65a/UQe1da65a_OA.pdf https://espace.library.uq.edu.au/view/UQ:e1da65a eng eng Oxford University Press doi:10.1093/mnras/stz485 issn:0035-8711 issn:1365-2966 orcid:0000-0002-1576-2505 FT180100066 FL140100278 DE150100618 Not set FT140100255 FT140101166 CE170100013 CE110001020 Mass Assembly Gama Star-Formation Rates Angular-Momentum Evolution Red Sequence Disk Galaxies Data Release Morphological Evolution Formation Histories Eagle Simulations Atlas(3D) Project Journal Article 2019 ftunivqespace https://doi.org/10.1093/mnras/stz485 2020-12-08T07:55:29Z At fixed stellar mass, satellite galaxies show higher passive fractions than centrals, suggesting that environment is directly quenching their star formation. Here, we investigate whether satellite quenching is accompanied by changes in stellar spin (quantified by the ratio of the rotational to dispersion velocity V/sigma for a sample of massive (M* > 10(10) M-circle dot) satellite galaxies extracted from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey. These systems are carefully matched to a control sample of main sequence, high V/s central galaxies. As expected, at fixed stellar mass and ellipticity, satellites have lower star formation rate (SFR) and spin than the control centrals. However, most of the difference is in SFR, whereas the spin decreases significantly only for satellites that have already reached the red sequence. We perform a similar analysis for galaxies in the Evolution and Assembly of GaLaxies and their Environments (EAGLE) hydrodynamical simulation and recover differences in both SFR and spin similar to those observed in SAMI. However, when EAGLE satellites are matched to their true central progenitors, the change in spin is further reduced and galaxies mainly show a decrease in SFR during their satellite phase. The difference in spin observed between satellites and centrals at z similar to 0 is primarily due to the fact that satellites do not grow their angular momentum as fast as centrals after accreting into bigger haloes, not to a reduction of V/s due to environmental effects. Our findings highlight the effect of progenitor bias in our understanding of galaxy transformation and they suggest that satellites undergo little structural change before and during their quenching phase. Article in Journal/Newspaper sami The University of Queensland: UQ eSpace Monthly Notices of the Royal Astronomical Society 485 2 2656 2665 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Mass Assembly Gama Star-Formation Rates Angular-Momentum Evolution Red Sequence Disk Galaxies Data Release Morphological Evolution Formation Histories Eagle Simulations Atlas(3D) Project |
spellingShingle |
Mass Assembly Gama Star-Formation Rates Angular-Momentum Evolution Red Sequence Disk Galaxies Data Release Morphological Evolution Formation Histories Eagle Simulations Atlas(3D) Project Cortese, L. van de Sande, J. Lagos, C. P. Catinella, B. Davies, L. J. M. Croom, S. M. Brough, S. Bryant, J. J. Lawrence, J. S. Owers, M. S. Richards, S. N. Sweet, S. M. Bland-Hawthorn, J. The SAMI Galaxy Survey: satellite galaxies undergo little structural change during their quenching phase |
topic_facet |
Mass Assembly Gama Star-Formation Rates Angular-Momentum Evolution Red Sequence Disk Galaxies Data Release Morphological Evolution Formation Histories Eagle Simulations Atlas(3D) Project |
description |
At fixed stellar mass, satellite galaxies show higher passive fractions than centrals, suggesting that environment is directly quenching their star formation. Here, we investigate whether satellite quenching is accompanied by changes in stellar spin (quantified by the ratio of the rotational to dispersion velocity V/sigma for a sample of massive (M* > 10(10) M-circle dot) satellite galaxies extracted from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey. These systems are carefully matched to a control sample of main sequence, high V/s central galaxies. As expected, at fixed stellar mass and ellipticity, satellites have lower star formation rate (SFR) and spin than the control centrals. However, most of the difference is in SFR, whereas the spin decreases significantly only for satellites that have already reached the red sequence. We perform a similar analysis for galaxies in the Evolution and Assembly of GaLaxies and their Environments (EAGLE) hydrodynamical simulation and recover differences in both SFR and spin similar to those observed in SAMI. However, when EAGLE satellites are matched to their true central progenitors, the change in spin is further reduced and galaxies mainly show a decrease in SFR during their satellite phase. The difference in spin observed between satellites and centrals at z similar to 0 is primarily due to the fact that satellites do not grow their angular momentum as fast as centrals after accreting into bigger haloes, not to a reduction of V/s due to environmental effects. Our findings highlight the effect of progenitor bias in our understanding of galaxy transformation and they suggest that satellites undergo little structural change before and during their quenching phase. |
format |
Article in Journal/Newspaper |
author |
Cortese, L. van de Sande, J. Lagos, C. P. Catinella, B. Davies, L. J. M. Croom, S. M. Brough, S. Bryant, J. J. Lawrence, J. S. Owers, M. S. Richards, S. N. Sweet, S. M. Bland-Hawthorn, J. |
author_facet |
Cortese, L. van de Sande, J. Lagos, C. P. Catinella, B. Davies, L. J. M. Croom, S. M. Brough, S. Bryant, J. J. Lawrence, J. S. Owers, M. S. Richards, S. N. Sweet, S. M. Bland-Hawthorn, J. |
author_sort |
Cortese, L. |
title |
The SAMI Galaxy Survey: satellite galaxies undergo little structural change during their quenching phase |
title_short |
The SAMI Galaxy Survey: satellite galaxies undergo little structural change during their quenching phase |
title_full |
The SAMI Galaxy Survey: satellite galaxies undergo little structural change during their quenching phase |
title_fullStr |
The SAMI Galaxy Survey: satellite galaxies undergo little structural change during their quenching phase |
title_full_unstemmed |
The SAMI Galaxy Survey: satellite galaxies undergo little structural change during their quenching phase |
title_sort |
sami galaxy survey: satellite galaxies undergo little structural change during their quenching phase |
publisher |
Oxford University Press |
publishDate |
2019 |
url |
https://espace.library.uq.edu.au/view/UQ:e1da65a/UQe1da65a_OA.pdf https://espace.library.uq.edu.au/view/UQ:e1da65a |
genre |
sami |
genre_facet |
sami |
op_relation |
doi:10.1093/mnras/stz485 issn:0035-8711 issn:1365-2966 orcid:0000-0002-1576-2505 FT180100066 FL140100278 DE150100618 Not set FT140100255 FT140101166 CE170100013 CE110001020 |
op_doi |
https://doi.org/10.1093/mnras/stz485 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
485 |
container_issue |
2 |
container_start_page |
2656 |
op_container_end_page |
2665 |
_version_ |
1766184141057949696 |