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 SAMI Galaxy Survey show that 11% of galaxies with fitted gas and stellar rotation are misaligned by more than 30 degre...
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ftdatacite:10.48550/arxiv.1811.09298 2023-05-15T18:11:19+02:00 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. 2018 https://dx.doi.org/10.48550/arxiv.1811.09298 https://arxiv.org/abs/1811.09298 unknown arXiv https://dx.doi.org/10.1093/mnras/sty3122 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Astrophysics of Galaxies astro-ph.GA FOS Physical sciences article-journal Article ScholarlyArticle Text 2018 ftdatacite https://doi.org/10.48550/arxiv.1811.09298 https://doi.org/10.1093/mnras/sty3122 2022-04-01T08:47:12Z 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 SAMI Galaxy Survey show that 11% of galaxies with fitted gas and stellar rotation are misaligned by more than 30 degrees in both field/group and cluster environments. Using SAMI morphological classifications and Sersic indices, the misalignment fraction is 45+/-6% in early-type galaxies, but only 5+/-1% in late-type galaxies. 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 early- and late-type galaxies 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 disks. Cluster environments are found to have gas misalignment driven primarily by cluster processes not by gas accretion. : Accepted for MNRAS, Nov 2018 Text sami DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
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Astrophysics of Galaxies astro-ph.GA FOS Physical sciences 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 |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
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 SAMI Galaxy Survey show that 11% of galaxies with fitted gas and stellar rotation are misaligned by more than 30 degrees in both field/group and cluster environments. Using SAMI morphological classifications and Sersic indices, the misalignment fraction is 45+/-6% in early-type galaxies, but only 5+/-1% in late-type galaxies. 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 early- and late-type galaxies 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 disks. Cluster environments are found to have gas misalignment driven primarily by cluster processes not by gas accretion. : Accepted for MNRAS, Nov 2018 |
format |
Text |
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 |
publisher |
arXiv |
publishDate |
2018 |
url |
https://dx.doi.org/10.48550/arxiv.1811.09298 https://arxiv.org/abs/1811.09298 |
genre |
sami |
genre_facet |
sami |
op_relation |
https://dx.doi.org/10.1093/mnras/sty3122 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1811.09298 https://doi.org/10.1093/mnras/sty3122 |
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1766184002419425280 |