The SAMI Galaxy Survey: the relationship between galaxy rotation and the motion of neighbours
Using data from the SAMI Galaxy Survey, we investigate the correlation between the projected stellar kinematic spin vector of 1397 SAMI galaxies and the line-of-sight motion of their neighbouring galaxies. We calculate the luminosity-weighted mean velocity difference between SAMI galaxies and their...
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/316463 2024-04-28T08:37:17+00:00 The SAMI Galaxy Survey: the relationship between galaxy rotation and the motion of neighbours Mai, Yifan Vaughan, Sam P Croom, Scott M van de Sande, Jesse Barsanti, Stefania Bland-Hawthorn, Joss Brough, Sarah Bryant, Julia J Colless, Matthew Goodwin, Michael Groves, Brent Konstantopoulos, Iraklis S. Lawrence, Jon application/pdf http://hdl.handle.net/1885/316463 https://doi.org/10.1093/mnras/stac1841 https://openresearch-repository.anu.edu.au/bitstream/1885/316463/3/stac1841.pdf.jpg en_AU eng Oxford University Press http://purl.org/au-research/grants/arc/DE200100461 http://purl.org/au-research/grants/arc/FT140101166 http://purl.org/au-research/grants/arc/FL140100278 http://purl.org/au-research/grants/arc/FF0776384 http://purl.org/au-research/grants/arc/LE130100198 http://purl.org/au-research/grants/arc/FT180100231 http://purl.org/au-research/grants/arc/FT140101202 http://purl.org/au-research/grants/arc/CE170100013 http://purl.org/au-research/grants/arc/CE1101020 0035-8711 http://hdl.handle.net/1885/316463 doi:10.1093/mnras/stac1841 https://openresearch-repository.anu.edu.au/bitstream/1885/316463/3/stac1841.pdf.jpg © 2022 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International License Monthly Notices of the Royal Astronomical Society galaxies: evolution galaxies: interactions galaxies: kinematics and dynamics Journal article ftanucanberra https://doi.org/10.1093/mnras/stac1841 2024-04-09T23:31:30Z Using data from the SAMI Galaxy Survey, we investigate the correlation between the projected stellar kinematic spin vector of 1397 SAMI galaxies and the line-of-sight motion of their neighbouring galaxies. We calculate the luminosity-weighted mean velocity difference between SAMI galaxies and their neighbours in the direction perpendicular to the SAMI galaxies' angular momentum axes. The luminosity-weighted mean velocity offset between SAMI galaxies and neighbours, which indicates the signal of coherence between the rotation of the SAMI galaxies and the motion of neighbours, is 9.0 ± 5.4 km s-1 (1.7σ) for neighbours within 1 Mpc. In a large-scale analysis, we find that the average velocity offsets increase for neighbours out to 2 Mpc. However, the velocities are consistent with zero or negative for neighbours outside 3 Mpc. The negative signals for neighbours at a distance around 10 Mpc are also significant at the ~2σ level, which indicate that the positive signals within 2 Mpc might come from the variance of large-scale structure. We also calculate average velocities of different subsamples, including galaxies in different regions of the sky, galaxies with different stellar masses, galaxy type, λRe, and inclination. Although subsamples of low-mass, high-mass, early-type, and low-spin galaxies show the 2-3σ signal of coherence for the neighbours within 2 Mpc, the results for different inclination subsamples and large-scale results suggest that the ~2σ signals might result from coincidental scatter or variance of large-scale structure. Overall, the modest evidence of coherence signals for neighbouring galaxies within 2 Mpc needs to be confirmed by larger samples of observations and simulation studies. JvdS acknowledges support of an Australian Research Council Discovery Early Career Research Award (project number DE200100461) funded by the Australian Government. SBr acknowledges funding support from the Australian Research Council through a Future Fellowship (FT140101166). JBH is supported by an ARC Laureate ... Article in Journal/Newspaper sami Australian National University: ANU Digital Collections Monthly Notices of the Royal Astronomical Society 515 1 984 997 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
English |
topic |
galaxies: evolution galaxies: interactions galaxies: kinematics and dynamics |
spellingShingle |
galaxies: evolution galaxies: interactions galaxies: kinematics and dynamics Mai, Yifan Vaughan, Sam P Croom, Scott M van de Sande, Jesse Barsanti, Stefania Bland-Hawthorn, Joss Brough, Sarah Bryant, Julia J Colless, Matthew Goodwin, Michael Groves, Brent Konstantopoulos, Iraklis S. Lawrence, Jon The SAMI Galaxy Survey: the relationship between galaxy rotation and the motion of neighbours |
topic_facet |
galaxies: evolution galaxies: interactions galaxies: kinematics and dynamics |
description |
Using data from the SAMI Galaxy Survey, we investigate the correlation between the projected stellar kinematic spin vector of 1397 SAMI galaxies and the line-of-sight motion of their neighbouring galaxies. We calculate the luminosity-weighted mean velocity difference between SAMI galaxies and their neighbours in the direction perpendicular to the SAMI galaxies' angular momentum axes. The luminosity-weighted mean velocity offset between SAMI galaxies and neighbours, which indicates the signal of coherence between the rotation of the SAMI galaxies and the motion of neighbours, is 9.0 ± 5.4 km s-1 (1.7σ) for neighbours within 1 Mpc. In a large-scale analysis, we find that the average velocity offsets increase for neighbours out to 2 Mpc. However, the velocities are consistent with zero or negative for neighbours outside 3 Mpc. The negative signals for neighbours at a distance around 10 Mpc are also significant at the ~2σ level, which indicate that the positive signals within 2 Mpc might come from the variance of large-scale structure. We also calculate average velocities of different subsamples, including galaxies in different regions of the sky, galaxies with different stellar masses, galaxy type, λRe, and inclination. Although subsamples of low-mass, high-mass, early-type, and low-spin galaxies show the 2-3σ signal of coherence for the neighbours within 2 Mpc, the results for different inclination subsamples and large-scale results suggest that the ~2σ signals might result from coincidental scatter or variance of large-scale structure. Overall, the modest evidence of coherence signals for neighbouring galaxies within 2 Mpc needs to be confirmed by larger samples of observations and simulation studies. JvdS acknowledges support of an Australian Research Council Discovery Early Career Research Award (project number DE200100461) funded by the Australian Government. SBr acknowledges funding support from the Australian Research Council through a Future Fellowship (FT140101166). JBH is supported by an ARC Laureate ... |
format |
Article in Journal/Newspaper |
author |
Mai, Yifan Vaughan, Sam P Croom, Scott M van de Sande, Jesse Barsanti, Stefania Bland-Hawthorn, Joss Brough, Sarah Bryant, Julia J Colless, Matthew Goodwin, Michael Groves, Brent Konstantopoulos, Iraklis S. Lawrence, Jon |
author_facet |
Mai, Yifan Vaughan, Sam P Croom, Scott M van de Sande, Jesse Barsanti, Stefania Bland-Hawthorn, Joss Brough, Sarah Bryant, Julia J Colless, Matthew Goodwin, Michael Groves, Brent Konstantopoulos, Iraklis S. Lawrence, Jon |
author_sort |
Mai, Yifan |
title |
The SAMI Galaxy Survey: the relationship between galaxy rotation and the motion of neighbours |
title_short |
The SAMI Galaxy Survey: the relationship between galaxy rotation and the motion of neighbours |
title_full |
The SAMI Galaxy Survey: the relationship between galaxy rotation and the motion of neighbours |
title_fullStr |
The SAMI Galaxy Survey: the relationship between galaxy rotation and the motion of neighbours |
title_full_unstemmed |
The SAMI Galaxy Survey: the relationship between galaxy rotation and the motion of neighbours |
title_sort |
sami galaxy survey: the relationship between galaxy rotation and the motion of neighbours |
publisher |
Oxford University Press |
url |
http://hdl.handle.net/1885/316463 https://doi.org/10.1093/mnras/stac1841 https://openresearch-repository.anu.edu.au/bitstream/1885/316463/3/stac1841.pdf.jpg |
genre |
sami |
genre_facet |
sami |
op_source |
Monthly Notices of the Royal Astronomical Society |
op_relation |
http://purl.org/au-research/grants/arc/DE200100461 http://purl.org/au-research/grants/arc/FT140101166 http://purl.org/au-research/grants/arc/FL140100278 http://purl.org/au-research/grants/arc/FF0776384 http://purl.org/au-research/grants/arc/LE130100198 http://purl.org/au-research/grants/arc/FT180100231 http://purl.org/au-research/grants/arc/FT140101202 http://purl.org/au-research/grants/arc/CE170100013 http://purl.org/au-research/grants/arc/CE1101020 0035-8711 http://hdl.handle.net/1885/316463 doi:10.1093/mnras/stac1841 https://openresearch-repository.anu.edu.au/bitstream/1885/316463/3/stac1841.pdf.jpg |
op_rights |
© 2022 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International License |
op_doi |
https://doi.org/10.1093/mnras/stac1841 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
515 |
container_issue |
1 |
container_start_page |
984 |
op_container_end_page |
997 |
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1797568749798162432 |