The SAMI Galaxy Survey: first detection of a transition in spin orientation with respect to cosmic filaments in the stellar kinematics of galaxies
We present the first detection of mass-dependent galactic spin alignments with local cosmic filaments with >2σ confidence using IFS kinematics. The 3D network of cosmic filaments is reconstructed on Mpc scales across GAlaxy and Mass Assembly fields using the cosmic web extractor DISPERSE. We assi...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Language: | English |
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Oxford University Press
2020
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:21d5fdd 2023-05-15T18:11:17+02:00 The SAMI Galaxy Survey: first detection of a transition in spin orientation with respect to cosmic filaments in the stellar kinematics of galaxies Welker, C. Bland-Hawthorn, J. Van de Sande, J. Lagos, C. Elahi, P. Obreshkow, D. Bryant, J. Pichon, C. Cortese, L. Richards, S. N. Croom, S. M. Goodwin, M. Lawrence, J. S. Sweet, S. Lopez-Sanchez, A. Medling, A. Owers, M. S. Dubois, Y. Devriendt, J. 2020-01-01 https://espace.library.uq.edu.au/view/UQ:21d5fdd/UQ21d5fdd_OA.pdf https://espace.library.uq.edu.au/view/UQ:21d5fdd eng eng Oxford University Press doi:10.1093/mnras/stz2860 issn:0035-8711 issn:1365-2966 orcid:0000-0002-1576-2505 FF0776384 %7C CE170100013 %7C FT180100231 %7C CE110001020 %7C LE130100198 %7C FL140100278 PHY-1748958 Space and Planetary Science Astronomy and Astrophysics Journal Article 2020 ftunivqespace https://doi.org/10.1093/mnras/stz2860 2020-11-03T02:00:39Z We present the first detection of mass-dependent galactic spin alignments with local cosmic filaments with >2σ confidence using IFS kinematics. The 3D network of cosmic filaments is reconstructed on Mpc scales across GAlaxy and Mass Assembly fields using the cosmic web extractor DISPERSE. We assign field galaxies from the SAMI survey to their nearest filament segment in 3D and estimate the degree of alignment between SAMI galaxies’ kinematic spin axis and their nearest filament in projection. Low-mass galaxies align their spin with their nearest filament while higher mass counterparts are more likely to display an orthogonal orientation. The stellar transition mass from the first trend to the second is bracketed between 1010.4 and 1010.9M⊙, with hints of an increase with filament scale. Consistent signals are found in the Horizon-AGN cosmological hydrodynamic simulation. This supports a scenario of early angular momentum build-up in vorticity rich quadrants around filaments at low stellar mass followed by progressive flip of spins orthogonal to the cosmic filaments through mergers at high stellar mass. Conversely, we show that dark matter only simulations post-processed with a semi-analytical model treatment of galaxy formation struggles to reproduce this alignment signal. This suggests that gas physics is key in enhancing the galaxy-filament alignment. Article in Journal/Newspaper sami The University of Queensland: UQ eSpace Monthly Notices of the Royal Astronomical Society 491 2 2864 2884 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Space and Planetary Science Astronomy and Astrophysics |
spellingShingle |
Space and Planetary Science Astronomy and Astrophysics Welker, C. Bland-Hawthorn, J. Van de Sande, J. Lagos, C. Elahi, P. Obreshkow, D. Bryant, J. Pichon, C. Cortese, L. Richards, S. N. Croom, S. M. Goodwin, M. Lawrence, J. S. Sweet, S. Lopez-Sanchez, A. Medling, A. Owers, M. S. Dubois, Y. Devriendt, J. The SAMI Galaxy Survey: first detection of a transition in spin orientation with respect to cosmic filaments in the stellar kinematics of galaxies |
topic_facet |
Space and Planetary Science Astronomy and Astrophysics |
description |
We present the first detection of mass-dependent galactic spin alignments with local cosmic filaments with >2σ confidence using IFS kinematics. The 3D network of cosmic filaments is reconstructed on Mpc scales across GAlaxy and Mass Assembly fields using the cosmic web extractor DISPERSE. We assign field galaxies from the SAMI survey to their nearest filament segment in 3D and estimate the degree of alignment between SAMI galaxies’ kinematic spin axis and their nearest filament in projection. Low-mass galaxies align their spin with their nearest filament while higher mass counterparts are more likely to display an orthogonal orientation. The stellar transition mass from the first trend to the second is bracketed between 1010.4 and 1010.9M⊙, with hints of an increase with filament scale. Consistent signals are found in the Horizon-AGN cosmological hydrodynamic simulation. This supports a scenario of early angular momentum build-up in vorticity rich quadrants around filaments at low stellar mass followed by progressive flip of spins orthogonal to the cosmic filaments through mergers at high stellar mass. Conversely, we show that dark matter only simulations post-processed with a semi-analytical model treatment of galaxy formation struggles to reproduce this alignment signal. This suggests that gas physics is key in enhancing the galaxy-filament alignment. |
format |
Article in Journal/Newspaper |
author |
Welker, C. Bland-Hawthorn, J. Van de Sande, J. Lagos, C. Elahi, P. Obreshkow, D. Bryant, J. Pichon, C. Cortese, L. Richards, S. N. Croom, S. M. Goodwin, M. Lawrence, J. S. Sweet, S. Lopez-Sanchez, A. Medling, A. Owers, M. S. Dubois, Y. Devriendt, J. |
author_facet |
Welker, C. Bland-Hawthorn, J. Van de Sande, J. Lagos, C. Elahi, P. Obreshkow, D. Bryant, J. Pichon, C. Cortese, L. Richards, S. N. Croom, S. M. Goodwin, M. Lawrence, J. S. Sweet, S. Lopez-Sanchez, A. Medling, A. Owers, M. S. Dubois, Y. Devriendt, J. |
author_sort |
Welker, C. |
title |
The SAMI Galaxy Survey: first detection of a transition in spin orientation with respect to cosmic filaments in the stellar kinematics of galaxies |
title_short |
The SAMI Galaxy Survey: first detection of a transition in spin orientation with respect to cosmic filaments in the stellar kinematics of galaxies |
title_full |
The SAMI Galaxy Survey: first detection of a transition in spin orientation with respect to cosmic filaments in the stellar kinematics of galaxies |
title_fullStr |
The SAMI Galaxy Survey: first detection of a transition in spin orientation with respect to cosmic filaments in the stellar kinematics of galaxies |
title_full_unstemmed |
The SAMI Galaxy Survey: first detection of a transition in spin orientation with respect to cosmic filaments in the stellar kinematics of galaxies |
title_sort |
sami galaxy survey: first detection of a transition in spin orientation with respect to cosmic filaments in the stellar kinematics of galaxies |
publisher |
Oxford University Press |
publishDate |
2020 |
url |
https://espace.library.uq.edu.au/view/UQ:21d5fdd/UQ21d5fdd_OA.pdf https://espace.library.uq.edu.au/view/UQ:21d5fdd |
genre |
sami |
genre_facet |
sami |
op_relation |
doi:10.1093/mnras/stz2860 issn:0035-8711 issn:1365-2966 orcid:0000-0002-1576-2505 FF0776384 %7C CE170100013 %7C FT180100231 %7C CE110001020 %7C LE130100198 %7C FL140100278 PHY-1748958 |
op_doi |
https://doi.org/10.1093/mnras/stz2860 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
491 |
container_issue |
2 |
container_start_page |
2864 |
op_container_end_page |
2884 |
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1766183968300859392 |