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...
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ftcarolinadr:cdr.lib.unc.edu:st74d118f 2023-06-11T04:16:22+02:00 The SAMI Galaxy Survey: Spatially resolving the main sequence of star formation Medling, A.M. Cortese, L. Croom, S.M. Green, A.W. Groves, B. Hampton, E. Ho, I.-T. Davies, L.J.M. Kewley, L.J. Moffett, A.J. Schaefer, A.L. Taylor, E. Zafar, T. Bekki, K. Bland-Hawthorn, J. Bloom, J.V. Brough, S. Bryant, J.J. Catinella, B. Cecil, G. Colless, M. Couch, W.J. Drinkwater, M.J. Driver, S.P. Federrath, C. Foster, C. Goldstein, G. Goodwin, M. Hopkins, A. Lawrence, J.S. Leslie, S.K. Lewis, G.F. Lorente, N.P.F. Owers, M.S., McDermid, R. Richards, S.N. Sharp, R. Scott, N. Sweet, S.M. Taranu, D.S. Tescari, E. Tonini, C. van de Sande, J. Walcher, C.J. Wright, A. College of Arts and Sciences, Department of Physics and Astronomy 2018 https://doi.org/10.17615/ymap-we81 https://cdr.lib.unc.edu/downloads/6395wh688?file=thumbnail https://cdr.lib.unc.edu/downloads/6395wh688 English eng Oxford University Press https://doi.org/10.17615/ymap-we81 https://cdr.lib.unc.edu/downloads/6395wh688?file=thumbnail https://cdr.lib.unc.edu/downloads/6395wh688 Monthly Notices of the Royal Astronomical Society, 475(4) Galaxies: evolution Galaxies: star formation Surveys Article 2018 ftcarolinadr https://doi.org/10.17615/ymap-we81 2023-05-28T21:02:43Z 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 Carolina Digital Repository (UNC - University of North Carolina) |
institution |
Open Polar |
collection |
Carolina Digital Repository (UNC - University of North Carolina) |
op_collection_id |
ftcarolinadr |
language |
English |
topic |
Galaxies: evolution Galaxies: star formation Surveys |
spellingShingle |
Galaxies: evolution Galaxies: star formation Surveys Medling, A.M. Cortese, L. Croom, S.M. Green, A.W. Groves, B. Hampton, E. Ho, I.-T. Davies, L.J.M. Kewley, L.J. Moffett, A.J. Schaefer, A.L. Taylor, E. Zafar, T. Bekki, K. Bland-Hawthorn, J. Bloom, J.V. Brough, S. Bryant, J.J. Catinella, B. Cecil, G. Colless, M. Couch, W.J. Drinkwater, M.J. Driver, S.P. Federrath, C. Foster, C. Goldstein, G. Goodwin, M. Hopkins, A. Lawrence, J.S. Leslie, S.K. Lewis, G.F. Lorente, N.P.F. Owers, M.S., McDermid, R. Richards, S.N. Sharp, R. Scott, N. Sweet, S.M. Taranu, D.S. Tescari, E. Tonini, C. van de Sande, J. Walcher, C.J. Wright, A. The SAMI Galaxy Survey: Spatially resolving the main sequence of star formation |
topic_facet |
Galaxies: evolution Galaxies: star formation Surveys |
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 |
College of Arts and Sciences, Department of Physics and Astronomy |
format |
Article in Journal/Newspaper |
author |
Medling, A.M. Cortese, L. Croom, S.M. Green, A.W. Groves, B. Hampton, E. Ho, I.-T. Davies, L.J.M. Kewley, L.J. Moffett, A.J. Schaefer, A.L. Taylor, E. Zafar, T. Bekki, K. Bland-Hawthorn, J. Bloom, J.V. Brough, S. Bryant, J.J. Catinella, B. Cecil, G. Colless, M. Couch, W.J. Drinkwater, M.J. Driver, S.P. Federrath, C. Foster, C. Goldstein, G. Goodwin, M. Hopkins, A. Lawrence, J.S. Leslie, S.K. Lewis, G.F. Lorente, N.P.F. Owers, M.S., McDermid, R. Richards, S.N. Sharp, R. Scott, N. Sweet, S.M. Taranu, D.S. Tescari, E. Tonini, C. van de Sande, J. Walcher, C.J. Wright, A. |
author_facet |
Medling, A.M. Cortese, L. Croom, S.M. Green, A.W. Groves, B. Hampton, E. Ho, I.-T. Davies, L.J.M. Kewley, L.J. Moffett, A.J. Schaefer, A.L. Taylor, E. Zafar, T. Bekki, K. Bland-Hawthorn, J. Bloom, J.V. Brough, S. Bryant, J.J. Catinella, B. Cecil, G. Colless, M. Couch, W.J. Drinkwater, M.J. Driver, S.P. Federrath, C. Foster, C. Goldstein, G. Goodwin, M. Hopkins, A. Lawrence, J.S. Leslie, S.K. Lewis, G.F. Lorente, N.P.F. Owers, M.S., McDermid, R. Richards, S.N. Sharp, R. Scott, N. Sweet, S.M. Taranu, D.S. Tescari, E. Tonini, C. van de Sande, J. Walcher, C.J. Wright, A. |
author_sort |
Medling, A.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://doi.org/10.17615/ymap-we81 https://cdr.lib.unc.edu/downloads/6395wh688?file=thumbnail https://cdr.lib.unc.edu/downloads/6395wh688 |
genre |
sami |
genre_facet |
sami |
op_source |
Monthly Notices of the Royal Astronomical Society, 475(4) |
op_relation |
https://doi.org/10.17615/ymap-we81 https://cdr.lib.unc.edu/downloads/6395wh688?file=thumbnail https://cdr.lib.unc.edu/downloads/6395wh688 |
op_doi |
https://doi.org/10.17615/ymap-we81 |
_version_ |
1768374094882930688 |