The SAMI Galaxy Survey:stellar and gas misalignments and the origin of gas in nearby galaxies
Misalignment of gas and stellar rotation in galaxies can give clues to the origin and processing of accreted gas. Integral field spectroscopic observations of 1213 galaxies from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey show that 11 per cent of galaxies with fitted...
Published in: | Monthly Notices of the Royal Astronomical Society |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2019
|
Subjects: | |
Online Access: | https://researchers.mq.edu.au/en/publications/6b4bae0e-98e4-48df-b10e-2180e6c56908 https://doi.org/10.1093/mnras/sty3122 http://www.scopus.com/inward/record.url?scp=85063137636&partnerID=8YFLogxK http://purl.org/au-research/grants/arc/FT140100255 http://purl.org/au-research/grants/arc/CE1101020 |
id |
ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/6b4bae0e-98e4-48df-b10e-2180e6c56908 |
---|---|
record_format |
openpolar |
spelling |
ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/6b4bae0e-98e4-48df-b10e-2180e6c56908 2024-06-23T07:56:31+00:00 The SAMI Galaxy Survey:stellar and gas misalignments and the origin of gas in nearby galaxies Bryant, J. J. Croom, S. M. van de Sande, J. Scott, N. Fogarty, L. M. R. Bland-Hawthorn, J. Bloom, J. V. Taylor, E. N. Brough, S. Robotham, A. Cortese, L. Couch, W. Owers, M. S. Medling, A. M. Federrath, C. Bekki, K. Richards, S. N. Lawrence, J. S. Konstantopoulos, I. S. 2019-02 https://researchers.mq.edu.au/en/publications/6b4bae0e-98e4-48df-b10e-2180e6c56908 https://doi.org/10.1093/mnras/sty3122 http://www.scopus.com/inward/record.url?scp=85063137636&partnerID=8YFLogxK http://purl.org/au-research/grants/arc/FT140100255 http://purl.org/au-research/grants/arc/CE1101020 eng eng info:eu-repo/semantics/openAccess Bryant , J J , Croom , S M , van de Sande , J , Scott , N , Fogarty , L M R , Bland-Hawthorn , J , Bloom , J V , Taylor , E N , Brough , S , Robotham , A , Cortese , L , Couch , W , Owers , M S , Medling , A M , Federrath , C , Bekki , K , Richards , S N , Lawrence , J S & Konstantopoulos , I S 2019 , ' The SAMI Galaxy Survey : stellar and gas misalignments and the origin of gas in nearby galaxies ' , Monthly Notices of the Royal Astronomical Society , vol. 483 , no. 1 , pp. 458-479 . https://doi.org/10.1093/mnras/sty3122 techniques: imaging spectroscopy surveys galaxies: evolution galaxies: kinematics and dynamics article 2019 ftmacquarieunicr https://doi.org/10.1093/mnras/sty3122 2024-06-05T23:47:49Z Misalignment of gas and stellar rotation in galaxies can give clues to the origin and processing of accreted gas. Integral field spectroscopic observations of 1213 galaxies from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey show that 11 per cent of galaxies with fitted gas and stellar rotation are misaligned by more than 30 ◦ in both field/group and cluster environments. Using SAMI morphological classifications and Sérsic indices, the misalignment fraction is 45 ± 6 per cent in early-type galaxies (ETGs), but only 5 ± 1 per cent in late-type galaxies (LTGs). The distribution of position angle offsets is used to test the physical drivers of this difference. Slower dynamical settling time of the gas in elliptical stellar mass distributions accounts for a small increase in misalignment in early-type galaxies. However, gravitational dynamical settling time is insufficient to fully explain the observed differences between ETGs and LTGs in the distributions of the gas/stellar position angle offsets. LTGs have primarily accreted gas close to aligned rather than settled from misaligned based on analysis of the skewed distribution of PA offsets compared to a dynamical settling model. Local environment density is less important in setting the misalignment fractions than morphology, suggesting that mergers are not the main source of accreted gas in these discs. Cluster environments are found to have gas misalignment driven primarily by cluster processes not by gas accretion. Article in Journal/Newspaper sami Macquarie University Research Portal Monthly Notices of the Royal Astronomical Society 483 1 458 479 |
institution |
Open Polar |
collection |
Macquarie University Research Portal |
op_collection_id |
ftmacquarieunicr |
language |
English |
topic |
techniques: imaging spectroscopy surveys galaxies: evolution galaxies: kinematics and dynamics |
spellingShingle |
techniques: imaging spectroscopy surveys galaxies: evolution galaxies: kinematics and dynamics Bryant, J. J. Croom, S. M. van de Sande, J. Scott, N. Fogarty, L. M. R. Bland-Hawthorn, J. Bloom, J. V. Taylor, E. N. Brough, S. Robotham, A. Cortese, L. Couch, W. Owers, M. S. Medling, A. M. Federrath, C. Bekki, K. Richards, S. N. Lawrence, J. S. Konstantopoulos, I. S. The SAMI Galaxy Survey:stellar and gas misalignments and the origin of gas in nearby galaxies |
topic_facet |
techniques: imaging spectroscopy surveys galaxies: evolution galaxies: kinematics and dynamics |
description |
Misalignment of gas and stellar rotation in galaxies can give clues to the origin and processing of accreted gas. Integral field spectroscopic observations of 1213 galaxies from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey show that 11 per cent of galaxies with fitted gas and stellar rotation are misaligned by more than 30 ◦ in both field/group and cluster environments. Using SAMI morphological classifications and Sérsic indices, the misalignment fraction is 45 ± 6 per cent in early-type galaxies (ETGs), but only 5 ± 1 per cent in late-type galaxies (LTGs). The distribution of position angle offsets is used to test the physical drivers of this difference. Slower dynamical settling time of the gas in elliptical stellar mass distributions accounts for a small increase in misalignment in early-type galaxies. However, gravitational dynamical settling time is insufficient to fully explain the observed differences between ETGs and LTGs in the distributions of the gas/stellar position angle offsets. LTGs have primarily accreted gas close to aligned rather than settled from misaligned based on analysis of the skewed distribution of PA offsets compared to a dynamical settling model. Local environment density is less important in setting the misalignment fractions than morphology, suggesting that mergers are not the main source of accreted gas in these discs. Cluster environments are found to have gas misalignment driven primarily by cluster processes not by gas accretion. |
format |
Article in Journal/Newspaper |
author |
Bryant, J. J. Croom, S. M. van de Sande, J. Scott, N. Fogarty, L. M. R. Bland-Hawthorn, J. Bloom, J. V. Taylor, E. N. Brough, S. Robotham, A. Cortese, L. Couch, W. Owers, M. S. Medling, A. M. Federrath, C. Bekki, K. Richards, S. N. Lawrence, J. S. Konstantopoulos, I. S. |
author_facet |
Bryant, J. J. Croom, S. M. van de Sande, J. Scott, N. Fogarty, L. M. R. Bland-Hawthorn, J. Bloom, J. V. Taylor, E. N. Brough, S. Robotham, A. Cortese, L. Couch, W. Owers, M. S. Medling, A. M. Federrath, C. Bekki, K. Richards, S. N. Lawrence, J. S. Konstantopoulos, I. S. |
author_sort |
Bryant, J. J. |
title |
The SAMI Galaxy Survey:stellar and gas misalignments and the origin of gas in nearby galaxies |
title_short |
The SAMI Galaxy Survey:stellar and gas misalignments and the origin of gas in nearby galaxies |
title_full |
The SAMI Galaxy Survey:stellar and gas misalignments and the origin of gas in nearby galaxies |
title_fullStr |
The SAMI Galaxy Survey:stellar and gas misalignments and the origin of gas in nearby galaxies |
title_full_unstemmed |
The SAMI Galaxy Survey:stellar and gas misalignments and the origin of gas in nearby galaxies |
title_sort |
sami galaxy survey:stellar and gas misalignments and the origin of gas in nearby galaxies |
publishDate |
2019 |
url |
https://researchers.mq.edu.au/en/publications/6b4bae0e-98e4-48df-b10e-2180e6c56908 https://doi.org/10.1093/mnras/sty3122 http://www.scopus.com/inward/record.url?scp=85063137636&partnerID=8YFLogxK http://purl.org/au-research/grants/arc/FT140100255 http://purl.org/au-research/grants/arc/CE1101020 |
genre |
sami |
genre_facet |
sami |
op_source |
Bryant , J J , Croom , S M , van de Sande , J , Scott , N , Fogarty , L M R , Bland-Hawthorn , J , Bloom , J V , Taylor , E N , Brough , S , Robotham , A , Cortese , L , Couch , W , Owers , M S , Medling , A M , Federrath , C , Bekki , K , Richards , S N , Lawrence , J S & Konstantopoulos , I S 2019 , ' The SAMI Galaxy Survey : stellar and gas misalignments and the origin of gas in nearby galaxies ' , Monthly Notices of the Royal Astronomical Society , vol. 483 , no. 1 , pp. 458-479 . https://doi.org/10.1093/mnras/sty3122 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1093/mnras/sty3122 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
483 |
container_issue |
1 |
container_start_page |
458 |
op_container_end_page |
479 |
_version_ |
1802649661322821632 |