Data from: The SAMI Galaxy Survey: decomposed stellar kinematics of galaxy bulges and disks
Associated Persons Sree Oh (Creator); Matthew Colless (Creator); Stefania Barsanti (Creator); Sarah Casura (Creator); Jesse Van De Sande (Creator); Matt S. Owers (Creator); Nicholas Scott (Creator); Francesco D'Eugenio (Creator); Joss Bland-Hawthorn (Creator); Sarah Brough (Creator); Julia Brya...
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The University of Western Australia
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Online Access: | https://researchdata.edu.au/data-from-the-bulges-disks/1682067 |
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ftands:oai:ands.org.au::1682067 2023-11-12T04:25:46+01:00 Data from: The SAMI Galaxy Survey: decomposed stellar kinematics of galaxy bulges and disks Brent Groves (Creator) Intl Centre for Radio Astronomy Research (ICRAR) (isManagedBy) Luca Cortese (Creator) https://researchdata.edu.au/data-from-the-bulges-disks/1682067 unknown The University of Western Australia https://researchdata.edu.au/data-from-the-bulges-disks/1682067 7311f91c-9d67-4a06-ae4b-1c169ce4215e University of Western Australia galaxies: evolution galaxies: formation galaxies: fundamental parameters galaxies: kinematics and dynamics galaxies: stellar content galaxies: structure Astrophysics - Astrophysics of Galaxies dataset ftands 2023-10-23T22:23:03Z Associated Persons Sree Oh (Creator); Matthew Colless (Creator); Stefania Barsanti (Creator); Sarah Casura (Creator); Jesse Van De Sande (Creator); Matt S. Owers (Creator); Nicholas Scott (Creator); Francesco D'Eugenio (Creator); Joss Bland-Hawthorn (Creator); Sarah Brough (Creator); Julia Bryant (Creator); Scott M. Croom (Creator); Caroline Foster (Creator); Jon S. Lawrence (Creator); Samuel N. Richards (Creator); Sarah M. Sweet (Creator) 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 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 PPXV 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; and (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. Dataset sami Research Data Australia (Australian National Data Service - ANDS) Bryant ENVELOPE(-60.942,-60.942,-71.236,-71.236) Sande ENVELOPE(7.527,7.527,62.631,62.631) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
galaxies: evolution galaxies: formation galaxies: fundamental parameters galaxies: kinematics and dynamics galaxies: stellar content galaxies: structure Astrophysics - Astrophysics of Galaxies |
spellingShingle |
galaxies: evolution galaxies: formation galaxies: fundamental parameters galaxies: kinematics and dynamics galaxies: stellar content galaxies: structure Astrophysics - Astrophysics of Galaxies Data from: The SAMI Galaxy Survey: decomposed stellar kinematics of galaxy bulges and disks |
topic_facet |
galaxies: evolution galaxies: formation galaxies: fundamental parameters galaxies: kinematics and dynamics galaxies: stellar content galaxies: structure Astrophysics - Astrophysics of Galaxies |
description |
Associated Persons Sree Oh (Creator); Matthew Colless (Creator); Stefania Barsanti (Creator); Sarah Casura (Creator); Jesse Van De Sande (Creator); Matt S. Owers (Creator); Nicholas Scott (Creator); Francesco D'Eugenio (Creator); Joss Bland-Hawthorn (Creator); Sarah Brough (Creator); Julia Bryant (Creator); Scott M. Croom (Creator); Caroline Foster (Creator); Jon S. Lawrence (Creator); Samuel N. Richards (Creator); Sarah M. Sweet (Creator) 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 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 PPXV 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; and (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. |
author2 |
Brent Groves (Creator) Intl Centre for Radio Astronomy Research (ICRAR) (isManagedBy) Luca Cortese (Creator) |
format |
Dataset |
title |
Data from: The SAMI Galaxy Survey: decomposed stellar kinematics of galaxy bulges and disks |
title_short |
Data from: The SAMI Galaxy Survey: decomposed stellar kinematics of galaxy bulges and disks |
title_full |
Data from: The SAMI Galaxy Survey: decomposed stellar kinematics of galaxy bulges and disks |
title_fullStr |
Data from: The SAMI Galaxy Survey: decomposed stellar kinematics of galaxy bulges and disks |
title_full_unstemmed |
Data from: The SAMI Galaxy Survey: decomposed stellar kinematics of galaxy bulges and disks |
title_sort |
data from: the sami galaxy survey: decomposed stellar kinematics of galaxy bulges and disks |
publisher |
The University of Western Australia |
url |
https://researchdata.edu.au/data-from-the-bulges-disks/1682067 |
long_lat |
ENVELOPE(-60.942,-60.942,-71.236,-71.236) ENVELOPE(7.527,7.527,62.631,62.631) |
geographic |
Bryant Sande |
geographic_facet |
Bryant Sande |
genre |
sami |
genre_facet |
sami |
op_source |
University of Western Australia |
op_relation |
https://researchdata.edu.au/data-from-the-bulges-disks/1682067 7311f91c-9d67-4a06-ae4b-1c169ce4215e |
_version_ |
1782339896741986304 |