The SAMI Galaxy Survey:the intrinsic shape of kinematically selected galaxies
Using the stellar kinematic maps and ancillary imaging data from the Sydney AAO Multi Integral field (SAMI) Galaxy Survey, the intrinsic shape of kinematically selected samples of galaxies is inferred. We implement an efficient and optimized algorithm to fit the intrinsic shape of galaxies using an...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Main Authors: | , , , , , , , , , , , , , , , , , , , |
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2017
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Online Access: | https://researchers.mq.edu.au/en/publications/c9c3ea45-c08e-4bce-a696-d9fb27a370ff https://doi.org/10.1093/mnras/stx1869 http://purl.org/au-research/grants/arc/CE110001020 http://purl.org/au-research/grants/arc/FT140100255 http://purl.org/au-research/grants/arc/FT150100333 http://www.scopus.com/inward/record.url?scp=85047117689&partnerID=8YFLogxK |
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ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/c9c3ea45-c08e-4bce-a696-d9fb27a370ff 2024-06-23T07:56:32+00:00 The SAMI Galaxy Survey:the intrinsic shape of kinematically selected galaxies Foster, C. van de Sande, J. D'Eugenio, F. Cortese, L. McDermid, R. M. Bland-Hawthorn, J. Brough, S. Bryant, J. Croom, S. M. Goodwin, M. Konstantopoulos, I. S. Lawrence, J. Lopez-Sanchez, A. R. Medling, A. M. Owers, M. S. Richards, S. N. Scott, N. Taranu, D. S. Tonini, C. Zafar, T. 2017-11-21 https://researchers.mq.edu.au/en/publications/c9c3ea45-c08e-4bce-a696-d9fb27a370ff https://doi.org/10.1093/mnras/stx1869 http://purl.org/au-research/grants/arc/CE110001020 http://purl.org/au-research/grants/arc/FT140100255 http://purl.org/au-research/grants/arc/FT150100333 http://www.scopus.com/inward/record.url?scp=85047117689&partnerID=8YFLogxK eng eng info:eu-repo/semantics/closedAccess Foster , C , van de Sande , J , D'Eugenio , F , Cortese , L , McDermid , R M , Bland-Hawthorn , J , Brough , S , Bryant , J , Croom , S M , Goodwin , M , Konstantopoulos , I S , Lawrence , J , Lopez-Sanchez , A R , Medling , A M , Owers , M S , Richards , S N , Scott , N , Taranu , D S , Tonini , C & Zafar , T 2017 , ' The SAMI Galaxy Survey : the intrinsic shape of kinematically selected galaxies ' , Monthly Notices of the Royal Astronomical Society , vol. 472 , no. 1 , pp. 966-978 . https://doi.org/10.1093/mnras/stx1869 galaxies: fundamental parameters galaxies: kinematics and dynamics article 2017 ftmacquarieunicr https://doi.org/10.1093/mnras/stx1869 2024-06-05T23:47:48Z Using the stellar kinematic maps and ancillary imaging data from the Sydney AAO Multi Integral field (SAMI) Galaxy Survey, the intrinsic shape of kinematically selected samples of galaxies is inferred. We implement an efficient and optimized algorithm to fit the intrinsic shape of galaxies using an established method to simultaneously invert the distributions of apparent ellipticities and kinematic misalignments. The algorithm output compares favourably with previous studies of the intrinsic shape of galaxies based on imaging alone and our re-analysis of the ATLAS 3D data. Our results indicate that most galaxies are oblate axisymmetric. We show empirically that the intrinsic shape of galaxies varies as a function of their rotational support as measured by the 'spin' parameter proxy λ Re . In particular, low-spin systems have a higher occurrence of triaxiality, while high-spin systems are more intrinsically flattened and axisymmetric. The intrinsic shape of galaxies is linked to their formation and merger histories. Galaxies with high-spin values have intrinsic shapes consistent with dissipational minor mergers, while the intrinsic shape of low-spin systems is consistent with dissipationless multimerger assembly histories. This range in assembly histories inferred from intrinsic shapes is broadly consistent with expectations from cosmological simulations. Article in Journal/Newspaper sami Macquarie University Research Portal Monthly Notices of the Royal Astronomical Society 472 1 966 978 |
institution |
Open Polar |
collection |
Macquarie University Research Portal |
op_collection_id |
ftmacquarieunicr |
language |
English |
topic |
galaxies: fundamental parameters galaxies: kinematics and dynamics |
spellingShingle |
galaxies: fundamental parameters galaxies: kinematics and dynamics Foster, C. van de Sande, J. D'Eugenio, F. Cortese, L. McDermid, R. M. Bland-Hawthorn, J. Brough, S. Bryant, J. Croom, S. M. Goodwin, M. Konstantopoulos, I. S. Lawrence, J. Lopez-Sanchez, A. R. Medling, A. M. Owers, M. S. Richards, S. N. Scott, N. Taranu, D. S. Tonini, C. Zafar, T. The SAMI Galaxy Survey:the intrinsic shape of kinematically selected galaxies |
topic_facet |
galaxies: fundamental parameters galaxies: kinematics and dynamics |
description |
Using the stellar kinematic maps and ancillary imaging data from the Sydney AAO Multi Integral field (SAMI) Galaxy Survey, the intrinsic shape of kinematically selected samples of galaxies is inferred. We implement an efficient and optimized algorithm to fit the intrinsic shape of galaxies using an established method to simultaneously invert the distributions of apparent ellipticities and kinematic misalignments. The algorithm output compares favourably with previous studies of the intrinsic shape of galaxies based on imaging alone and our re-analysis of the ATLAS 3D data. Our results indicate that most galaxies are oblate axisymmetric. We show empirically that the intrinsic shape of galaxies varies as a function of their rotational support as measured by the 'spin' parameter proxy λ Re . In particular, low-spin systems have a higher occurrence of triaxiality, while high-spin systems are more intrinsically flattened and axisymmetric. The intrinsic shape of galaxies is linked to their formation and merger histories. Galaxies with high-spin values have intrinsic shapes consistent with dissipational minor mergers, while the intrinsic shape of low-spin systems is consistent with dissipationless multimerger assembly histories. This range in assembly histories inferred from intrinsic shapes is broadly consistent with expectations from cosmological simulations. |
format |
Article in Journal/Newspaper |
author |
Foster, C. van de Sande, J. D'Eugenio, F. Cortese, L. McDermid, R. M. Bland-Hawthorn, J. Brough, S. Bryant, J. Croom, S. M. Goodwin, M. Konstantopoulos, I. S. Lawrence, J. Lopez-Sanchez, A. R. Medling, A. M. Owers, M. S. Richards, S. N. Scott, N. Taranu, D. S. Tonini, C. Zafar, T. |
author_facet |
Foster, C. van de Sande, J. D'Eugenio, F. Cortese, L. McDermid, R. M. Bland-Hawthorn, J. Brough, S. Bryant, J. Croom, S. M. Goodwin, M. Konstantopoulos, I. S. Lawrence, J. Lopez-Sanchez, A. R. Medling, A. M. Owers, M. S. Richards, S. N. Scott, N. Taranu, D. S. Tonini, C. Zafar, T. |
author_sort |
Foster, C. |
title |
The SAMI Galaxy Survey:the intrinsic shape of kinematically selected galaxies |
title_short |
The SAMI Galaxy Survey:the intrinsic shape of kinematically selected galaxies |
title_full |
The SAMI Galaxy Survey:the intrinsic shape of kinematically selected galaxies |
title_fullStr |
The SAMI Galaxy Survey:the intrinsic shape of kinematically selected galaxies |
title_full_unstemmed |
The SAMI Galaxy Survey:the intrinsic shape of kinematically selected galaxies |
title_sort |
sami galaxy survey:the intrinsic shape of kinematically selected galaxies |
publishDate |
2017 |
url |
https://researchers.mq.edu.au/en/publications/c9c3ea45-c08e-4bce-a696-d9fb27a370ff https://doi.org/10.1093/mnras/stx1869 http://purl.org/au-research/grants/arc/CE110001020 http://purl.org/au-research/grants/arc/FT140100255 http://purl.org/au-research/grants/arc/FT150100333 http://www.scopus.com/inward/record.url?scp=85047117689&partnerID=8YFLogxK |
genre |
sami |
genre_facet |
sami |
op_source |
Foster , C , van de Sande , J , D'Eugenio , F , Cortese , L , McDermid , R M , Bland-Hawthorn , J , Brough , S , Bryant , J , Croom , S M , Goodwin , M , Konstantopoulos , I S , Lawrence , J , Lopez-Sanchez , A R , Medling , A M , Owers , M S , Richards , S N , Scott , N , Taranu , D S , Tonini , C & Zafar , T 2017 , ' The SAMI Galaxy Survey : the intrinsic shape of kinematically selected galaxies ' , Monthly Notices of the Royal Astronomical Society , vol. 472 , no. 1 , pp. 966-978 . https://doi.org/10.1093/mnras/stx1869 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1093/mnras/stx1869 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
472 |
container_issue |
1 |
container_start_page |
966 |
op_container_end_page |
978 |
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1802649671545389056 |