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: | https://espace.library.uq.edu.au/view/UQ:726914/UQ726914_OA.pdf https://espace.library.uq.edu.au/view/UQ:726914 |
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:726914 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. 2018-04-21 https://espace.library.uq.edu.au/view/UQ:726914/UQ726914_OA.pdf https://espace.library.uq.edu.au/view/UQ:726914 eng eng Oxford University Press doi:10.1093/mnras/sty127 issn:1365-2966 issn:0035-8711 orcid:0000-0003-4867-0022 HST-HF2-51377 NAS5-26555 FT100100457 FT140101166 FT120100660 DP150104329 DP170100603 FT140100255 FT150100333 Not set FL140100278 CE110001020 179.A-2004 177.A-3016 Galaxies: evolution Galaxies: star formation Surveys 1912 Space and Planetary Science 3103 Astronomy and Astrophysics Journal Article 2018 ftunivqespace https://doi.org/10.1093/mnras/sty127 2020-12-29T00:41:59Z 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 The University of Queensland: UQ eSpace Monthly Notices of the Royal Astronomical Society 475 4 5194 5214 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Galaxies: evolution Galaxies: star formation Surveys 1912 Space and Planetary Science 3103 Astronomy and Astrophysics |
spellingShingle |
Galaxies: evolution Galaxies: star formation Surveys 1912 Space and Planetary Science 3103 Astronomy and Astrophysics 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. The SAMI Galaxy Survey: spatially resolving the main sequence of star formation |
topic_facet |
Galaxies: evolution Galaxies: star formation Surveys 1912 Space and Planetary Science 3103 Astronomy and Astrophysics |
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. |
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. |
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. |
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 |
https://espace.library.uq.edu.au/view/UQ:726914/UQ726914_OA.pdf https://espace.library.uq.edu.au/view/UQ:726914 |
genre |
sami |
genre_facet |
sami |
op_relation |
doi:10.1093/mnras/sty127 issn:1365-2966 issn:0035-8711 orcid:0000-0003-4867-0022 HST-HF2-51377 NAS5-26555 FT100100457 FT140101166 FT120100660 DP150104329 DP170100603 FT140100255 FT150100333 Not set FL140100278 CE110001020 179.A-2004 177.A-3016 |
op_doi |
https://doi.org/10.1093/mnras/sty127 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
475 |
container_issue |
4 |
container_start_page |
5194 |
op_container_end_page |
5214 |
_version_ |
1766183792617193472 |