THE SAMI GALAXY SURVEY: TOWARD A UNIFIED DYNAMICAL SCALING RELATION FOR GALAXIES OF ALL TYPES
We take advantage of the first data from the Sydney-AAO Multi-object Integral field Galaxy Survey to investigate the relation between the kinematics of gas and stars, and stellar mass in a comprehensive sample of nearby galaxies. We find that all 235 objects in our sample, regardless of their morpho...
Published in: | The Astrophysical Journal |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
American Astronomical Society
2014
|
Subjects: | |
Online Access: | http://hdl.handle.net/1959.3/388853 https://doi.org/10.1088/2041-8205/795/2/L37 |
id |
ftswinburneunicr:oai:researchbank.swinburne.edu.au:68afcd60-e33e-4441-929d-c775a2a63cd2/1 |
---|---|
record_format |
openpolar |
spelling |
ftswinburneunicr:oai:researchbank.swinburne.edu.au:68afcd60-e33e-4441-929d-c775a2a63cd2/1 2023-05-15T18:12:33+02:00 THE SAMI GALAXY SURVEY: TOWARD A UNIFIED DYNAMICAL SCALING RELATION FOR GALAXIES OF ALL TYPES Cortese, L. Fogarty, L. M. R. Ho, I.-T. Bekki, K. Bland-Hawthorn, J. Colless, M. Couch, W. Croom, S. M. Glazebrook, K. Mould, J. Scott, N. Sharp, R. Tonini, C. Allen, J. T. Bloom, J. Bryant, J. J. Cluver, M. Davies, Roger L. Drinkwater, M. J. Goodwin, M. Green, A. Kewley, L. J. Kostantopoulos, I. S. Lawrence, J. S. Mahajan, S. Medling, A. M. Owers, M. Richards, S. N. Sweet, S. M. Wong, O. I. Swinburne University of Technology 2014 http://hdl.handle.net/1959.3/388853 https://doi.org/10.1088/2041-8205/795/2/L37 unknown American Astronomical Society http://purl.org/au-research/grants/arc/DP130100664 http://hdl.handle.net/1959.3/388853 https://doi.org/10.1088/2041-8205/795/2/L37 Copyright © 2014 The American Astronomical Society. The published version is reproduced in accordance with the copyright policy of the publisher and can be also be located at http://dx.doi.org/10.1088/2041-8205/795/2/L37 Astrophysical Journal Letters, Vol. 795, no. 2 (Oct 2014), L37 Journal article 2014 ftswinburneunicr https://doi.org/10.1088/2041-8205/795/2/L37 2022-09-11T16:35:16Z We take advantage of the first data from the Sydney-AAO Multi-object Integral field Galaxy Survey to investigate the relation between the kinematics of gas and stars, and stellar mass in a comprehensive sample of nearby galaxies. We find that all 235 objects in our sample, regardless of their morphology, lie on a tight relation linking stellar mass (M∗) to internal velocity quantified by the S0.5 parameter, which combines the contribution of both dispersion (σ) and rotational velocity (Vrot) to the dynamical support of a galaxy (S0.5 = √ 0.5 Vrot2 + σ2). Our results are independent of the baryonic component from which σ and V rot are estimated, as the S 0.5 of stars and gas agree remarkably well. This represents a significant improvement compared to the canonical M∗ versus Vrot and M∗ versus σ relations. Not only is no sample pruning necessary, but also stellar and gas kinematics can be used simultaneously, as the effect of asymmetric drift is taken into account once Vrot and σ are combined. Our findings illustrate how the combination of dispersion and rotational velocities for both gas and stars can provide us with a single dynamical scaling relation valid for galaxies of all morphologies across at least the stellar mass range 8.5 Article in Journal/Newspaper sami Swinburne Research Bank (Swinburne University of Technology) The Astrophysical Journal 795 2 L37 |
institution |
Open Polar |
collection |
Swinburne Research Bank (Swinburne University of Technology) |
op_collection_id |
ftswinburneunicr |
language |
unknown |
description |
We take advantage of the first data from the Sydney-AAO Multi-object Integral field Galaxy Survey to investigate the relation between the kinematics of gas and stars, and stellar mass in a comprehensive sample of nearby galaxies. We find that all 235 objects in our sample, regardless of their morphology, lie on a tight relation linking stellar mass (M∗) to internal velocity quantified by the S0.5 parameter, which combines the contribution of both dispersion (σ) and rotational velocity (Vrot) to the dynamical support of a galaxy (S0.5 = √ 0.5 Vrot2 + σ2). Our results are independent of the baryonic component from which σ and V rot are estimated, as the S 0.5 of stars and gas agree remarkably well. This represents a significant improvement compared to the canonical M∗ versus Vrot and M∗ versus σ relations. Not only is no sample pruning necessary, but also stellar and gas kinematics can be used simultaneously, as the effect of asymmetric drift is taken into account once Vrot and σ are combined. Our findings illustrate how the combination of dispersion and rotational velocities for both gas and stars can provide us with a single dynamical scaling relation valid for galaxies of all morphologies across at least the stellar mass range 8.5 |
author2 |
Swinburne University of Technology |
format |
Article in Journal/Newspaper |
author |
Cortese, L. Fogarty, L. M. R. Ho, I.-T. Bekki, K. Bland-Hawthorn, J. Colless, M. Couch, W. Croom, S. M. Glazebrook, K. Mould, J. Scott, N. Sharp, R. Tonini, C. Allen, J. T. Bloom, J. Bryant, J. J. Cluver, M. Davies, Roger L. Drinkwater, M. J. Goodwin, M. Green, A. Kewley, L. J. Kostantopoulos, I. S. Lawrence, J. S. Mahajan, S. Medling, A. M. Owers, M. Richards, S. N. Sweet, S. M. Wong, O. I. |
spellingShingle |
Cortese, L. Fogarty, L. M. R. Ho, I.-T. Bekki, K. Bland-Hawthorn, J. Colless, M. Couch, W. Croom, S. M. Glazebrook, K. Mould, J. Scott, N. Sharp, R. Tonini, C. Allen, J. T. Bloom, J. Bryant, J. J. Cluver, M. Davies, Roger L. Drinkwater, M. J. Goodwin, M. Green, A. Kewley, L. J. Kostantopoulos, I. S. Lawrence, J. S. Mahajan, S. Medling, A. M. Owers, M. Richards, S. N. Sweet, S. M. Wong, O. I. THE SAMI GALAXY SURVEY: TOWARD A UNIFIED DYNAMICAL SCALING RELATION FOR GALAXIES OF ALL TYPES |
author_facet |
Cortese, L. Fogarty, L. M. R. Ho, I.-T. Bekki, K. Bland-Hawthorn, J. Colless, M. Couch, W. Croom, S. M. Glazebrook, K. Mould, J. Scott, N. Sharp, R. Tonini, C. Allen, J. T. Bloom, J. Bryant, J. J. Cluver, M. Davies, Roger L. Drinkwater, M. J. Goodwin, M. Green, A. Kewley, L. J. Kostantopoulos, I. S. Lawrence, J. S. Mahajan, S. Medling, A. M. Owers, M. Richards, S. N. Sweet, S. M. Wong, O. I. |
author_sort |
Cortese, L. |
title |
THE SAMI GALAXY SURVEY: TOWARD A UNIFIED DYNAMICAL SCALING RELATION FOR GALAXIES OF ALL TYPES |
title_short |
THE SAMI GALAXY SURVEY: TOWARD A UNIFIED DYNAMICAL SCALING RELATION FOR GALAXIES OF ALL TYPES |
title_full |
THE SAMI GALAXY SURVEY: TOWARD A UNIFIED DYNAMICAL SCALING RELATION FOR GALAXIES OF ALL TYPES |
title_fullStr |
THE SAMI GALAXY SURVEY: TOWARD A UNIFIED DYNAMICAL SCALING RELATION FOR GALAXIES OF ALL TYPES |
title_full_unstemmed |
THE SAMI GALAXY SURVEY: TOWARD A UNIFIED DYNAMICAL SCALING RELATION FOR GALAXIES OF ALL TYPES |
title_sort |
sami galaxy survey: toward a unified dynamical scaling relation for galaxies of all types |
publisher |
American Astronomical Society |
publishDate |
2014 |
url |
http://hdl.handle.net/1959.3/388853 https://doi.org/10.1088/2041-8205/795/2/L37 |
genre |
sami |
genre_facet |
sami |
op_source |
Astrophysical Journal Letters, Vol. 795, no. 2 (Oct 2014), L37 |
op_relation |
http://purl.org/au-research/grants/arc/DP130100664 http://hdl.handle.net/1959.3/388853 https://doi.org/10.1088/2041-8205/795/2/L37 |
op_rights |
Copyright © 2014 The American Astronomical Society. The published version is reproduced in accordance with the copyright policy of the publisher and can be also be located at http://dx.doi.org/10.1088/2041-8205/795/2/L37 |
op_doi |
https://doi.org/10.1088/2041-8205/795/2/L37 |
container_title |
The Astrophysical Journal |
container_volume |
795 |
container_issue |
2 |
container_start_page |
L37 |
_version_ |
1766185065161687040 |