The SAMI Galaxy Survey: first detection of a transition in spin orientation with respect to cosmic filaments in the stellar kinematics of galaxies
ABSTRACT 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 DisP...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Oxford University Press (OUP)
2019
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Online Access: | http://dx.doi.org/10.1093/mnras/stz2860 http://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stz2860/30139507/stz2860.pdf http://academic.oup.com/mnras/article-pdf/491/2/2864/31258133/stz2860.pdf |
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croxfordunivpr:10.1093/mnras/stz2860 2024-09-09T20:06:05+00:00 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 Obreschkow, 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 Australian Astronomical Observatory ARC National Science Foundation 2019 http://dx.doi.org/10.1093/mnras/stz2860 http://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stz2860/30139507/stz2860.pdf http://academic.oup.com/mnras/article-pdf/491/2/2864/31258133/stz2860.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Monthly Notices of the Royal Astronomical Society volume 491, issue 2, page 2864-2884 ISSN 0035-8711 1365-2966 journal-article 2019 croxfordunivpr https://doi.org/10.1093/mnras/stz2860 2024-08-05T04:31:30Z ABSTRACT 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 $10^{10.4}$ and $10^{10.9}\, \mathrm{ M}_{\odot }$, 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 Oxford University Press Monthly Notices of the Royal Astronomical Society 491 2 2864 2884 |
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Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
description |
ABSTRACT 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 $10^{10.4}$ and $10^{10.9}\, \mathrm{ M}_{\odot }$, 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. |
author2 |
Australian Astronomical Observatory ARC National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Welker, C Bland-Hawthorn, J Van de Sande, J Lagos, C Elahi, P Obreschkow, 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 |
spellingShingle |
Welker, C Bland-Hawthorn, J Van de Sande, J Lagos, C Elahi, P Obreschkow, 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 |
author_facet |
Welker, C Bland-Hawthorn, J Van de Sande, J Lagos, C Elahi, P Obreschkow, 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 (OUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1093/mnras/stz2860 http://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stz2860/30139507/stz2860.pdf http://academic.oup.com/mnras/article-pdf/491/2/2864/31258133/stz2860.pdf |
genre |
sami |
genre_facet |
sami |
op_source |
Monthly Notices of the Royal Astronomical Society volume 491, issue 2, page 2864-2884 ISSN 0035-8711 1365-2966 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
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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1809938460773974016 |