The SAMI galaxy survey : spatially resolving the environmental quenching of star formation in GAMA galaxies.
We use data from the Sydney-AAO Multi-Object Integral Field Spectrograph (SAMI) Galaxy Survey and the Galaxy And Mass Assembly (GAMA) survey to investigate the spatially-resolved signatures of the environmental quenching of star formation in galaxies. Using dust-corrected measurements of the distrib...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Oxford University Press
2017
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Online Access: | http://dro.dur.ac.uk/19946/ http://dro.dur.ac.uk/19946/1/19946.pdf http://dro.dur.ac.uk/19946/2/19946.pdf https://doi.org/10.1093/mnras/stw2289 |
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:19946 2023-05-15T18:11:52+02:00 The SAMI galaxy survey : spatially resolving the environmental quenching of star formation in GAMA galaxies. Schaefer, A. L. Croom, S. M. Allen, J. T. Brough, S. Medling, A. M. Ho, I.-T. Scott, N. Richards, S. N. Pracy, M. B. Gunawardhana, M. L. P. Norberg, P. Alpaslan, M. Bauer, A. E. Bekki, K. Bland-Hawthorn, J. Bloom, J. V. Bryant, J. J. Couch, W. J. Driver, S. P. Fogarty, L. M. R. Foster, C. Goldstein, G. Green, A. W. Hopkins, A. M. Konstantopoulos, I. S. Lawrence, J. S. López-Sánchez, A. R. Lorente, N. P. F. Owers, M. S. Sharp, R. Sweet, S. M. Taylor, E. N. van de Sande, J. Walcher, C. J. Wong, O. I. 2017-01-01 application/pdf http://dro.dur.ac.uk/19946/ http://dro.dur.ac.uk/19946/1/19946.pdf http://dro.dur.ac.uk/19946/2/19946.pdf https://doi.org/10.1093/mnras/stw2289 unknown Oxford University Press dro:19946 issn:0035-8711 issn: 1365-2966 doi:10.1093/mnras/stw2289 http://dro.dur.ac.uk/19946/ http://dx.doi.org/10.1093/mnras/stw2289 http://dro.dur.ac.uk/19946/1/19946.pdf http://dro.dur.ac.uk/19946/2/19946.pdf This article has been published in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. Monthly notices of the Royal Astronomical Society, 2017, Vol.464(1), pp.121-142 [Peer Reviewed Journal] Article PeerReviewed 2017 ftunivdurham https://doi.org/10.1093/mnras/stw2289 2020-05-28T22:35:51Z We use data from the Sydney-AAO Multi-Object Integral Field Spectrograph (SAMI) Galaxy Survey and the Galaxy And Mass Assembly (GAMA) survey to investigate the spatially-resolved signatures of the environmental quenching of star formation in galaxies. Using dust-corrected measurements of the distribution of Hα emission we measure the radial profiles of star formation in a sample of 201 star-forming galaxies covering three orders of magnitude in stellar mass (M∗M∗; 108.1-1010.95 M⊙) and in 5th nearest neighbour local environment density (Σ5; 10−1.3- 102.1 Mpc−2). We show that star formation rate gradients in galaxies are steeper in dense (log10(Σ5/Mpc2) > 0.5) environments by 0.58 ± 0.29 dex re−1 in galaxies with stellar masses in the range 1010 < M★/M⊙ < 1011 and that this steepening is accompanied by a reduction in the integrated star formation rate. However, for any given stellar mass or environment density the star-formation morphology of galaxies shows large scatter. We also measure the degree to which the star formation is centrally concentrated using the unitless scale-radius ratio (r50, Hα/r50, cont), which compares the extent of ongoing star formation to previous star formation. With this metric we find that the fraction of galaxies with centrally concentrated star formation increases with environment density, from ∼5 ± 4% in low-density environments (log10(Σ5/Mpc2) < 0.0) to 30 ± 15% in the highest density environments (log10(Σ5/Mpc2) > 1.0). These lines of evidence strongly suggest that with increasing local environment density the star formation in galaxies is suppressed, and that this starts in their outskirts such that quenching occurs in an outside-in fashion in dense environments and is not instantaneous. Article in Journal/Newspaper sami Durham University: Durham Research Online Monthly Notices of the Royal Astronomical Society 464 1 121 142 |
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Durham University: Durham Research Online |
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ftunivdurham |
language |
unknown |
description |
We use data from the Sydney-AAO Multi-Object Integral Field Spectrograph (SAMI) Galaxy Survey and the Galaxy And Mass Assembly (GAMA) survey to investigate the spatially-resolved signatures of the environmental quenching of star formation in galaxies. Using dust-corrected measurements of the distribution of Hα emission we measure the radial profiles of star formation in a sample of 201 star-forming galaxies covering three orders of magnitude in stellar mass (M∗M∗; 108.1-1010.95 M⊙) and in 5th nearest neighbour local environment density (Σ5; 10−1.3- 102.1 Mpc−2). We show that star formation rate gradients in galaxies are steeper in dense (log10(Σ5/Mpc2) > 0.5) environments by 0.58 ± 0.29 dex re−1 in galaxies with stellar masses in the range 1010 < M★/M⊙ < 1011 and that this steepening is accompanied by a reduction in the integrated star formation rate. However, for any given stellar mass or environment density the star-formation morphology of galaxies shows large scatter. We also measure the degree to which the star formation is centrally concentrated using the unitless scale-radius ratio (r50, Hα/r50, cont), which compares the extent of ongoing star formation to previous star formation. With this metric we find that the fraction of galaxies with centrally concentrated star formation increases with environment density, from ∼5 ± 4% in low-density environments (log10(Σ5/Mpc2) < 0.0) to 30 ± 15% in the highest density environments (log10(Σ5/Mpc2) > 1.0). These lines of evidence strongly suggest that with increasing local environment density the star formation in galaxies is suppressed, and that this starts in their outskirts such that quenching occurs in an outside-in fashion in dense environments and is not instantaneous. |
format |
Article in Journal/Newspaper |
author |
Schaefer, A. L. Croom, S. M. Allen, J. T. Brough, S. Medling, A. M. Ho, I.-T. Scott, N. Richards, S. N. Pracy, M. B. Gunawardhana, M. L. P. Norberg, P. Alpaslan, M. Bauer, A. E. Bekki, K. Bland-Hawthorn, J. Bloom, J. V. Bryant, J. J. Couch, W. J. Driver, S. P. Fogarty, L. M. R. Foster, C. Goldstein, G. Green, A. W. Hopkins, A. M. Konstantopoulos, I. S. Lawrence, J. S. López-Sánchez, A. R. Lorente, N. P. F. Owers, M. S. Sharp, R. Sweet, S. M. Taylor, E. N. van de Sande, J. Walcher, C. J. Wong, O. I. |
spellingShingle |
Schaefer, A. L. Croom, S. M. Allen, J. T. Brough, S. Medling, A. M. Ho, I.-T. Scott, N. Richards, S. N. Pracy, M. B. Gunawardhana, M. L. P. Norberg, P. Alpaslan, M. Bauer, A. E. Bekki, K. Bland-Hawthorn, J. Bloom, J. V. Bryant, J. J. Couch, W. J. Driver, S. P. Fogarty, L. M. R. Foster, C. Goldstein, G. Green, A. W. Hopkins, A. M. Konstantopoulos, I. S. Lawrence, J. S. López-Sánchez, A. R. Lorente, N. P. F. Owers, M. S. Sharp, R. Sweet, S. M. Taylor, E. N. van de Sande, J. Walcher, C. J. Wong, O. I. The SAMI galaxy survey : spatially resolving the environmental quenching of star formation in GAMA galaxies. |
author_facet |
Schaefer, A. L. Croom, S. M. Allen, J. T. Brough, S. Medling, A. M. Ho, I.-T. Scott, N. Richards, S. N. Pracy, M. B. Gunawardhana, M. L. P. Norberg, P. Alpaslan, M. Bauer, A. E. Bekki, K. Bland-Hawthorn, J. Bloom, J. V. Bryant, J. J. Couch, W. J. Driver, S. P. Fogarty, L. M. R. Foster, C. Goldstein, G. Green, A. W. Hopkins, A. M. Konstantopoulos, I. S. Lawrence, J. S. López-Sánchez, A. R. Lorente, N. P. F. Owers, M. S. Sharp, R. Sweet, S. M. Taylor, E. N. van de Sande, J. Walcher, C. J. Wong, O. I. |
author_sort |
Schaefer, A. L. |
title |
The SAMI galaxy survey : spatially resolving the environmental quenching of star formation in GAMA galaxies. |
title_short |
The SAMI galaxy survey : spatially resolving the environmental quenching of star formation in GAMA galaxies. |
title_full |
The SAMI galaxy survey : spatially resolving the environmental quenching of star formation in GAMA galaxies. |
title_fullStr |
The SAMI galaxy survey : spatially resolving the environmental quenching of star formation in GAMA galaxies. |
title_full_unstemmed |
The SAMI galaxy survey : spatially resolving the environmental quenching of star formation in GAMA galaxies. |
title_sort |
sami galaxy survey : spatially resolving the environmental quenching of star formation in gama galaxies. |
publisher |
Oxford University Press |
publishDate |
2017 |
url |
http://dro.dur.ac.uk/19946/ http://dro.dur.ac.uk/19946/1/19946.pdf http://dro.dur.ac.uk/19946/2/19946.pdf https://doi.org/10.1093/mnras/stw2289 |
genre |
sami |
genre_facet |
sami |
op_source |
Monthly notices of the Royal Astronomical Society, 2017, Vol.464(1), pp.121-142 [Peer Reviewed Journal] |
op_relation |
dro:19946 issn:0035-8711 issn: 1365-2966 doi:10.1093/mnras/stw2289 http://dro.dur.ac.uk/19946/ http://dx.doi.org/10.1093/mnras/stw2289 http://dro.dur.ac.uk/19946/1/19946.pdf http://dro.dur.ac.uk/19946/2/19946.pdf |
op_rights |
This article has been published in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
op_doi |
https://doi.org/10.1093/mnras/stw2289 |
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Monthly Notices of the Royal Astronomical Society |
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464 |
container_issue |
1 |
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121 |
op_container_end_page |
142 |
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1766184481953153024 |