The SAMI Galaxy Survey: Decomposed stellar kinematics of galaxy bulges and disks
We investigate the stellar kinematics of the bulge and disk components in 826 galaxies with a wide range of morphology from the Sydney-AAO Multi-object Integral-field spectroscopy (SAMI) Galaxy Survey. The spatially-resolved rotation velocity (V) and velocity dispersion (σ) of bulge and disk compone...
Published in: | Monthly Notices of the Royal Astronomical Society |
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2020
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:ef4ef91 2023-05-15T18:11:47+02:00 The SAMI Galaxy Survey: Decomposed stellar kinematics of galaxy bulges and disks Oh, Sree Colless, Matthew Barsanti, Stefania Casura, Sarah Cortese, Luca van de Sande, Jesse Owers, Matt S Scott, Nicholas D’Eugenio, Francesco Bland-Hawthorn, Joss Brough, Sarah Bryant, Julia J Croom, Scott M Foster, Caroline Groves, Brent Lawrence, Jon S Richards, Samuel N Sweet, Sarah M 2020-05-14 https://espace.library.uq.edu.au/view/UQ:ef4ef91 eng eng Oxford University Press doi:10.1093/mnras/staa1330 issn:0035-8711 issn:1365-2966 orcid:0000-0002-1576-2505 CE170100013 CE110001020 FT180100066 FT180100231 683184 FL140100278 Not set FT140100255 DE190100375 Space and Planetary Science Astronomy and Astrophysics Journal Article 2020 ftunivqespace https://doi.org/10.1093/mnras/staa1330 2020-12-01T02:57:24Z We investigate the stellar kinematics of the bulge and disk components in 826 galaxies with a wide range of morphology from the Sydney-AAO Multi-object Integral-field spectroscopy (SAMI) Galaxy Survey. The spatially-resolved rotation velocity (V) and velocity dispersion (σ) of bulge and disk components have been simultaneously estimated using the penalized pixel fitting (pPXF) method with photometrically defined weights for the two components. We introduce a new subroutine of pPXF for dealing with degeneracy in the solutions. We show that the V and σ distributions in each galaxy can be reconstructed using the kinematics and weights of the bulge and disk components. The combination of two distinct components provides a consistent description of the major kinematic features of galaxies over a wide range of morphological types. We present Tully-Fisher and Faber-Jackson relations showing that the galaxy stellar mass scales with both V and σ for both components of all galaxy types. We find a tight Faber-Jackson relation even for the disk component. We show that the bulge and disk components are kinematically distinct: (1) the two components show scaling relations with similar slopes, but different intercepts; (2) the spin parameter λR indicates bulges are pressure-dominated systems and disks are supported by rotation; (3) the bulge and disk components have, respectively, low and high values in intrinsic ellipticity. Our findings suggest that the relative contributions of the two components explain, at least to first order, the complex kinematic behaviour of galaxies. Article in Journal/Newspaper sami The University of Queensland: UQ eSpace Monthly Notices of the Royal Astronomical Society 495 4 4638 4658 |
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 Oh, Sree Colless, Matthew Barsanti, Stefania Casura, Sarah Cortese, Luca van de Sande, Jesse Owers, Matt S Scott, Nicholas D’Eugenio, Francesco Bland-Hawthorn, Joss Brough, Sarah Bryant, Julia J Croom, Scott M Foster, Caroline Groves, Brent Lawrence, Jon S Richards, Samuel N Sweet, Sarah M The SAMI Galaxy Survey: Decomposed stellar kinematics of galaxy bulges and disks |
topic_facet |
Space and Planetary Science Astronomy and Astrophysics |
description |
We investigate the stellar kinematics of the bulge and disk components in 826 galaxies with a wide range of morphology from the Sydney-AAO Multi-object Integral-field spectroscopy (SAMI) Galaxy Survey. The spatially-resolved rotation velocity (V) and velocity dispersion (σ) of bulge and disk components have been simultaneously estimated using the penalized pixel fitting (pPXF) method with photometrically defined weights for the two components. We introduce a new subroutine of pPXF for dealing with degeneracy in the solutions. We show that the V and σ distributions in each galaxy can be reconstructed using the kinematics and weights of the bulge and disk components. The combination of two distinct components provides a consistent description of the major kinematic features of galaxies over a wide range of morphological types. We present Tully-Fisher and Faber-Jackson relations showing that the galaxy stellar mass scales with both V and σ for both components of all galaxy types. We find a tight Faber-Jackson relation even for the disk component. We show that the bulge and disk components are kinematically distinct: (1) the two components show scaling relations with similar slopes, but different intercepts; (2) the spin parameter λR indicates bulges are pressure-dominated systems and disks are supported by rotation; (3) the bulge and disk components have, respectively, low and high values in intrinsic ellipticity. Our findings suggest that the relative contributions of the two components explain, at least to first order, the complex kinematic behaviour of galaxies. |
format |
Article in Journal/Newspaper |
author |
Oh, Sree Colless, Matthew Barsanti, Stefania Casura, Sarah Cortese, Luca van de Sande, Jesse Owers, Matt S Scott, Nicholas D’Eugenio, Francesco Bland-Hawthorn, Joss Brough, Sarah Bryant, Julia J Croom, Scott M Foster, Caroline Groves, Brent Lawrence, Jon S Richards, Samuel N Sweet, Sarah M |
author_facet |
Oh, Sree Colless, Matthew Barsanti, Stefania Casura, Sarah Cortese, Luca van de Sande, Jesse Owers, Matt S Scott, Nicholas D’Eugenio, Francesco Bland-Hawthorn, Joss Brough, Sarah Bryant, Julia J Croom, Scott M Foster, Caroline Groves, Brent Lawrence, Jon S Richards, Samuel N Sweet, Sarah M |
author_sort |
Oh, Sree |
title |
The SAMI Galaxy Survey: Decomposed stellar kinematics of galaxy bulges and disks |
title_short |
The SAMI Galaxy Survey: Decomposed stellar kinematics of galaxy bulges and disks |
title_full |
The SAMI Galaxy Survey: Decomposed stellar kinematics of galaxy bulges and disks |
title_fullStr |
The SAMI Galaxy Survey: Decomposed stellar kinematics of galaxy bulges and disks |
title_full_unstemmed |
The SAMI Galaxy Survey: Decomposed stellar kinematics of galaxy bulges and disks |
title_sort |
sami galaxy survey: decomposed stellar kinematics of galaxy bulges and disks |
publisher |
Oxford University Press |
publishDate |
2020 |
url |
https://espace.library.uq.edu.au/view/UQ:ef4ef91 |
genre |
sami |
genre_facet |
sami |
op_relation |
doi:10.1093/mnras/staa1330 issn:0035-8711 issn:1365-2966 orcid:0000-0002-1576-2505 CE170100013 CE110001020 FT180100066 FT180100231 683184 FL140100278 Not set FT140100255 DE190100375 |
op_doi |
https://doi.org/10.1093/mnras/staa1330 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
495 |
container_issue |
4 |
container_start_page |
4638 |
op_container_end_page |
4658 |
_version_ |
1766184411377696768 |