The SAMI Galaxy Survey: Spatially resolving the main sequence of star formation
We present the ~800 star formation rate maps for the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey based on Ha emission maps, corrected for dust attenuation via the Balmer decrement, that are included in the SAMI Public Data Release 1. We mask out spaxels contaminated by n...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Oxford University Press
2018
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Online Access: | http://hdl.handle.net/1959.3/442993 https://doi.org/10.1093/mnras/sty127 |
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ftswinburne:tle:be684e10-51e9-4e53-9498-27ddaf2f7451:28f49f06-0da8-44be-9edc-ad1dd0a9c582:1 2023-05-15T18:11:05+02:00 The SAMI Galaxy Survey: Spatially resolving the main sequence of star formation Medling, Anne M. Cortese, Luca Croom, Scott M. Green, Andrew W. Groves, Brent Hampton, Elise Ho, I-Ting Davies, Luke J. M. Kewley, Lisa J. Moffett, Amanda J. Schaefer, Adam L. Taylor, Edward Zafar, Tayyaba Bekki, Kenji Bland-Hawthorn, Joss Bloom, Jessica V. Brough, Sarah Bryant, Julia J. Catinella, Barbara Cecil, Gerald Colless, Matthew Couch, Warrick J. Drinkwater, Michael J. Driver, Simon P. Federrath, Christoph Foster, Caroline Goldstein, Gregory Goodwin, Michael Hopkins, Andrew Lawrence, J. S. Leslie, Sarah K. Lewis, Geraint F. Lorente, Nuria P. F. Owers, Matt S. McDermid, Richard Richards, Samuel N. Sharp, Robert Scott, Nicholas Sweet, Sarah M. Taranu, Dan S. Tescari, Edoardo Tonini, Chiara van de Sande, Jesse Walcher, C. Jakob Wright, Angus Swinburne University of Technology 2018 http://hdl.handle.net/1959.3/442993 https://doi.org/10.1093/mnras/sty127 unknown Oxford University Press http://purl.org/au-research/grants/arc/FT100100457 http://purl.org/au-research/grants/arc/FT120100660 http://purl.org/au-research/grants/arc/DP150104329 http://purl.org/au-research/grants/arc/DP170100603 http://purl.org/au-research/grants/arc/FT140100255 http://purl.org/au-research/grants/arc/FT150100333 http://purl.org/au-research/grants/arc/FL140100278 http://purl.org/au-research/grants/arc/CE110001020 http://hdl.handle.net/1959.3/442993 https://doi.org/10.1093/mnras/sty127 This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. Copyright © 2018 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. Monthly Notices of the Royal Astronomical Society, Vol. 475, no. 4 (Apr 2018), pp. 5194-5214 Journal article 2018 ftswinburne https://doi.org/10.1093/mnras/sty127 2019-09-07T21:29:07Z We present the ~800 star formation rate maps for the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey based on Ha emission maps, corrected for dust attenuation via the Balmer decrement, that are included in the SAMI Public Data Release 1. We mask out spaxels contaminated by non-stellar emission using the [O III]/H β, [NII]/H α, [S II]/H α, and [O I]/H α line ratios. Using thesemaps, we examine the global and resolved starforming main sequences of SAMI galaxies as a function of morphology, environmental density, and stellar mass. Galaxies further below the star-forming main sequence are more likely to have flatter star formation profiles. Early-type galaxies split into two populations with similar stellar masses and central stellar mass surface densities. The main-sequence population has centrally concentrated star formation similar to late-type galaxies, while galaxies > 3σ below the main sequence show significantly reduced star formation most strikingly in the nuclear regions. The split populations support a two-step quenching mechanism, wherein halo mass first cuts off the gas supply and remaining gas continues to form stars until the local stellar mass surface density can stabilize the reduced remaining fuel against further star formation. Across all morphologies, galaxies in denser environments show a decreased specific star formation rate from the outside in, supporting an environmental cause for quenching, such as ram-pressure stripping or galaxy interactions. Article in Journal/Newspaper sami Swinburne University of Technology: Swinburne Research Bank Monthly Notices of the Royal Astronomical Society 475 4 5194 5214 |
institution |
Open Polar |
collection |
Swinburne University of Technology: Swinburne Research Bank |
op_collection_id |
ftswinburne |
language |
unknown |
description |
We present the ~800 star formation rate maps for the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey based on Ha emission maps, corrected for dust attenuation via the Balmer decrement, that are included in the SAMI Public Data Release 1. We mask out spaxels contaminated by non-stellar emission using the [O III]/H β, [NII]/H α, [S II]/H α, and [O I]/H α line ratios. Using thesemaps, we examine the global and resolved starforming main sequences of SAMI galaxies as a function of morphology, environmental density, and stellar mass. Galaxies further below the star-forming main sequence are more likely to have flatter star formation profiles. Early-type galaxies split into two populations with similar stellar masses and central stellar mass surface densities. The main-sequence population has centrally concentrated star formation similar to late-type galaxies, while galaxies > 3σ below the main sequence show significantly reduced star formation most strikingly in the nuclear regions. The split populations support a two-step quenching mechanism, wherein halo mass first cuts off the gas supply and remaining gas continues to form stars until the local stellar mass surface density can stabilize the reduced remaining fuel against further star formation. Across all morphologies, galaxies in denser environments show a decreased specific star formation rate from the outside in, supporting an environmental cause for quenching, such as ram-pressure stripping or galaxy interactions. |
author2 |
Swinburne University of Technology |
format |
Article in Journal/Newspaper |
author |
Medling, Anne M. Cortese, Luca Croom, Scott M. Green, Andrew W. Groves, Brent Hampton, Elise Ho, I-Ting Davies, Luke J. M. Kewley, Lisa J. Moffett, Amanda J. Schaefer, Adam L. Taylor, Edward Zafar, Tayyaba Bekki, Kenji Bland-Hawthorn, Joss Bloom, Jessica V. Brough, Sarah Bryant, Julia J. Catinella, Barbara Cecil, Gerald Colless, Matthew Couch, Warrick J. Drinkwater, Michael J. Driver, Simon P. Federrath, Christoph Foster, Caroline Goldstein, Gregory Goodwin, Michael Hopkins, Andrew Lawrence, J. S. Leslie, Sarah K. Lewis, Geraint F. Lorente, Nuria P. F. Owers, Matt S. McDermid, Richard Richards, Samuel N. Sharp, Robert Scott, Nicholas Sweet, Sarah M. Taranu, Dan S. Tescari, Edoardo Tonini, Chiara van de Sande, Jesse Walcher, C. Jakob Wright, Angus |
spellingShingle |
Medling, Anne M. Cortese, Luca Croom, Scott M. Green, Andrew W. Groves, Brent Hampton, Elise Ho, I-Ting Davies, Luke J. M. Kewley, Lisa J. Moffett, Amanda J. Schaefer, Adam L. Taylor, Edward Zafar, Tayyaba Bekki, Kenji Bland-Hawthorn, Joss Bloom, Jessica V. Brough, Sarah Bryant, Julia J. Catinella, Barbara Cecil, Gerald Colless, Matthew Couch, Warrick J. Drinkwater, Michael J. Driver, Simon P. Federrath, Christoph Foster, Caroline Goldstein, Gregory Goodwin, Michael Hopkins, Andrew Lawrence, J. S. Leslie, Sarah K. Lewis, Geraint F. Lorente, Nuria P. F. Owers, Matt S. McDermid, Richard Richards, Samuel N. Sharp, Robert Scott, Nicholas Sweet, Sarah M. Taranu, Dan S. Tescari, Edoardo Tonini, Chiara van de Sande, Jesse Walcher, C. Jakob Wright, Angus The SAMI Galaxy Survey: Spatially resolving the main sequence of star formation |
author_facet |
Medling, Anne M. Cortese, Luca Croom, Scott M. Green, Andrew W. Groves, Brent Hampton, Elise Ho, I-Ting Davies, Luke J. M. Kewley, Lisa J. Moffett, Amanda J. Schaefer, Adam L. Taylor, Edward Zafar, Tayyaba Bekki, Kenji Bland-Hawthorn, Joss Bloom, Jessica V. Brough, Sarah Bryant, Julia J. Catinella, Barbara Cecil, Gerald Colless, Matthew Couch, Warrick J. Drinkwater, Michael J. Driver, Simon P. Federrath, Christoph Foster, Caroline Goldstein, Gregory Goodwin, Michael Hopkins, Andrew Lawrence, J. S. Leslie, Sarah K. Lewis, Geraint F. Lorente, Nuria P. F. Owers, Matt S. McDermid, Richard Richards, Samuel N. Sharp, Robert Scott, Nicholas Sweet, Sarah M. Taranu, Dan S. Tescari, Edoardo Tonini, Chiara van de Sande, Jesse Walcher, C. Jakob Wright, Angus |
author_sort |
Medling, Anne M. |
title |
The SAMI Galaxy Survey: Spatially resolving the main sequence of star formation |
title_short |
The SAMI Galaxy Survey: Spatially resolving the main sequence of star formation |
title_full |
The SAMI Galaxy Survey: Spatially resolving the main sequence of star formation |
title_fullStr |
The SAMI Galaxy Survey: Spatially resolving the main sequence of star formation |
title_full_unstemmed |
The SAMI Galaxy Survey: Spatially resolving the main sequence of star formation |
title_sort |
sami galaxy survey: spatially resolving the main sequence of star formation |
publisher |
Oxford University Press |
publishDate |
2018 |
url |
http://hdl.handle.net/1959.3/442993 https://doi.org/10.1093/mnras/sty127 |
genre |
sami |
genre_facet |
sami |
op_source |
Monthly Notices of the Royal Astronomical Society, Vol. 475, no. 4 (Apr 2018), pp. 5194-5214 |
op_relation |
http://purl.org/au-research/grants/arc/FT100100457 http://purl.org/au-research/grants/arc/FT120100660 http://purl.org/au-research/grants/arc/DP150104329 http://purl.org/au-research/grants/arc/DP170100603 http://purl.org/au-research/grants/arc/FT140100255 http://purl.org/au-research/grants/arc/FT150100333 http://purl.org/au-research/grants/arc/FL140100278 http://purl.org/au-research/grants/arc/CE110001020 http://hdl.handle.net/1959.3/442993 https://doi.org/10.1093/mnras/sty127 |
op_rights |
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. Copyright © 2018 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/sty127 |
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Monthly Notices of the Royal Astronomical Society |
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475 |
container_issue |
4 |
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5194 |
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5214 |
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