The SAMI galaxy survey : kinematics of dusty early-type galaxies
Recently, large samples of visually classified early-type galaxies (ETGs) containing dust have been identified using space-based infrared observations with the Herschel Space Telescope. The presence of large quantities of dust in massive ETGs is peculiar as X-ray haloes of these galaxies are expecte...
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/12539 2023-07-02T03:33:39+02:00 The SAMI galaxy survey : kinematics of dusty early-type galaxies Bassett, Robert Bekki, K. Cortese, L. Couch, W. J. Sansom, A. E. Sande, J. van de Bryant, J. J. Foster, C. Croom, S. M. Brough, S. Sweet, S. M. Medling, A. M. Owers, M. S. Driver, S. P. Davies, L. J. M. Wong, O. I. Groves, B. A. Bland-Hawthorn, J. Richards, S. N. Goodwin, M. Konstantopoulos, I. S. Lawrence, J. S. University of St Andrews. School of Physics and Astronomy 2018-01-19T17:30:16Z application/pdf http://hdl.handle.net/10023/12539 https://doi.org/10.1093/mnras/stx1000 http://arxiv.org/abs/1704.08433v1 eng eng Monthly Notices of the Royal Astronomical Society Bassett , R , Bekki , K , Cortese , L , Couch , W J , Sansom , A E , Sande , J V D , Bryant , J J , Foster , C , Croom , S M , Brough , S , Sweet , S M , Medling , A M , Owers , M S , Driver , S P , Davies , L J M , Wong , O I , Groves , B A , Bland-Hawthorn , J , Richards , S N , Goodwin , M , Konstantopoulos , I S & Lawrence , J S 2017 , ' The SAMI galaxy survey : kinematics of dusty early-type galaxies ' , Monthly Notices of the Royal Astronomical Society , vol. 470 , no. 2 , pp. 1991-2006 . https://doi.org/10.1093/mnras/stx1000 0035-8711 PURE: 252097002 PURE UUID: bd6c10e1-0b0a-455a-83cf-29172c7d7b25 ArXiv: http://arxiv.org/abs/1704.08433v1 Scopus: 85023752059 http://hdl.handle.net/10023/12539 https://doi.org/10.1093/mnras/stx1000 http://arxiv.org/abs/1704.08433v1 © 2017, the Author(s). This work has been made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at https://doi.org/10.1093/mnras/stx1000 Dust Extinction Galaxies: interactions Galaxies: kinematics and dynamics QB Astronomy QC Physics 3rd-DAS QB QC Journal article 2018 ftstandrewserep https://doi.org/10.1093/mnras/stx1000 2023-06-13T18:30:42Z Recently, large samples of visually classified early-type galaxies (ETGs) containing dust have been identified using space-based infrared observations with the Herschel Space Telescope. The presence of large quantities of dust in massive ETGs is peculiar as X-ray haloes of these galaxies are expected to destroy dust in ∼107 yr (or less). This has sparked a debate regarding the origin of the dust: Is it internally produced by asymptotic giant branch stars, or is it accreted externally through mergers? We examine the 2D stellar and ionized gas kinematics of dusty ETGs using integral field spectroscopy observations from the SAMI Galaxy Survey, and integrated star formation rates, stellar masses and dust masses from the GAMA survey. Only 8 per cent (4/49) of visually classified ETGs are kinematically consistent with being dispersion-supported systems. These ‘dispersion-dominated galaxies’ exhibit discrepancies between stellar and ionized gas kinematics, either offsets in the kinematic position angle or large differences in the rotational velocity, and are outliers in star formation rate at a fixed dust mass compared to normal star-forming galaxies. These properties are suggestive of recent merger activity. The remaining ∼90 per cent of dusty ETGs have low velocity dispersions and/or large circular velocities, typical of ‘rotation-dominated galaxies’. These results, along with the general evidence of published works on X-ray emission in ETGs, suggest that they are unlikely to host hot, X-ray gas consistent with their low M* when compared to dispersion-dominated galaxies. This means that dust will be long-lived and thus these galaxies do not require external scenarios for the origin of their dust content. Publisher PDF Peer reviewed Article in Journal/Newspaper sami University of St Andrews: Digital Research Repository Monthly Notices of the Royal Astronomical Society 470 2 1991 2006 |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
Dust Extinction Galaxies: interactions Galaxies: kinematics and dynamics QB Astronomy QC Physics 3rd-DAS QB QC |
spellingShingle |
Dust Extinction Galaxies: interactions Galaxies: kinematics and dynamics QB Astronomy QC Physics 3rd-DAS QB QC Bassett, Robert Bekki, K. Cortese, L. Couch, W. J. Sansom, A. E. Sande, J. van de Bryant, J. J. Foster, C. Croom, S. M. Brough, S. Sweet, S. M. Medling, A. M. Owers, M. S. Driver, S. P. Davies, L. J. M. Wong, O. I. Groves, B. A. Bland-Hawthorn, J. Richards, S. N. Goodwin, M. Konstantopoulos, I. S. Lawrence, J. S. The SAMI galaxy survey : kinematics of dusty early-type galaxies |
topic_facet |
Dust Extinction Galaxies: interactions Galaxies: kinematics and dynamics QB Astronomy QC Physics 3rd-DAS QB QC |
description |
Recently, large samples of visually classified early-type galaxies (ETGs) containing dust have been identified using space-based infrared observations with the Herschel Space Telescope. The presence of large quantities of dust in massive ETGs is peculiar as X-ray haloes of these galaxies are expected to destroy dust in ∼107 yr (or less). This has sparked a debate regarding the origin of the dust: Is it internally produced by asymptotic giant branch stars, or is it accreted externally through mergers? We examine the 2D stellar and ionized gas kinematics of dusty ETGs using integral field spectroscopy observations from the SAMI Galaxy Survey, and integrated star formation rates, stellar masses and dust masses from the GAMA survey. Only 8 per cent (4/49) of visually classified ETGs are kinematically consistent with being dispersion-supported systems. These ‘dispersion-dominated galaxies’ exhibit discrepancies between stellar and ionized gas kinematics, either offsets in the kinematic position angle or large differences in the rotational velocity, and are outliers in star formation rate at a fixed dust mass compared to normal star-forming galaxies. These properties are suggestive of recent merger activity. The remaining ∼90 per cent of dusty ETGs have low velocity dispersions and/or large circular velocities, typical of ‘rotation-dominated galaxies’. These results, along with the general evidence of published works on X-ray emission in ETGs, suggest that they are unlikely to host hot, X-ray gas consistent with their low M* when compared to dispersion-dominated galaxies. This means that dust will be long-lived and thus these galaxies do not require external scenarios for the origin of their dust content. Publisher PDF Peer reviewed |
author2 |
University of St Andrews. School of Physics and Astronomy |
format |
Article in Journal/Newspaper |
author |
Bassett, Robert Bekki, K. Cortese, L. Couch, W. J. Sansom, A. E. Sande, J. van de Bryant, J. J. Foster, C. Croom, S. M. Brough, S. Sweet, S. M. Medling, A. M. Owers, M. S. Driver, S. P. Davies, L. J. M. Wong, O. I. Groves, B. A. Bland-Hawthorn, J. Richards, S. N. Goodwin, M. Konstantopoulos, I. S. Lawrence, J. S. |
author_facet |
Bassett, Robert Bekki, K. Cortese, L. Couch, W. J. Sansom, A. E. Sande, J. van de Bryant, J. J. Foster, C. Croom, S. M. Brough, S. Sweet, S. M. Medling, A. M. Owers, M. S. Driver, S. P. Davies, L. J. M. Wong, O. I. Groves, B. A. Bland-Hawthorn, J. Richards, S. N. Goodwin, M. Konstantopoulos, I. S. Lawrence, J. S. |
author_sort |
Bassett, Robert |
title |
The SAMI galaxy survey : kinematics of dusty early-type galaxies |
title_short |
The SAMI galaxy survey : kinematics of dusty early-type galaxies |
title_full |
The SAMI galaxy survey : kinematics of dusty early-type galaxies |
title_fullStr |
The SAMI galaxy survey : kinematics of dusty early-type galaxies |
title_full_unstemmed |
The SAMI galaxy survey : kinematics of dusty early-type galaxies |
title_sort |
sami galaxy survey : kinematics of dusty early-type galaxies |
publishDate |
2018 |
url |
http://hdl.handle.net/10023/12539 https://doi.org/10.1093/mnras/stx1000 http://arxiv.org/abs/1704.08433v1 |
genre |
sami |
genre_facet |
sami |
op_relation |
Monthly Notices of the Royal Astronomical Society Bassett , R , Bekki , K , Cortese , L , Couch , W J , Sansom , A E , Sande , J V D , Bryant , J J , Foster , C , Croom , S M , Brough , S , Sweet , S M , Medling , A M , Owers , M S , Driver , S P , Davies , L J M , Wong , O I , Groves , B A , Bland-Hawthorn , J , Richards , S N , Goodwin , M , Konstantopoulos , I S & Lawrence , J S 2017 , ' The SAMI galaxy survey : kinematics of dusty early-type galaxies ' , Monthly Notices of the Royal Astronomical Society , vol. 470 , no. 2 , pp. 1991-2006 . https://doi.org/10.1093/mnras/stx1000 0035-8711 PURE: 252097002 PURE UUID: bd6c10e1-0b0a-455a-83cf-29172c7d7b25 ArXiv: http://arxiv.org/abs/1704.08433v1 Scopus: 85023752059 http://hdl.handle.net/10023/12539 https://doi.org/10.1093/mnras/stx1000 http://arxiv.org/abs/1704.08433v1 |
op_rights |
© 2017, the Author(s). This work has been made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at https://doi.org/10.1093/mnras/stx1000 |
op_doi |
https://doi.org/10.1093/mnras/stx1000 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
470 |
container_issue |
2 |
container_start_page |
1991 |
op_container_end_page |
2006 |
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1770273691292139520 |