The SAMI galaxy survey: Can we trust aperture corrections to predict star formation?
In the low-redshift Universe (z < 0.3), our view of galaxy evolution is primarily based on fibre optic spectroscopy surveys. Elaborate methods have been developed to address aperture effects when fixed aperture sizes only probe the inner regions for galaxies of ever decreasing redshift or increas...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Oxford University
2016
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Online Access: | http://hdl.handle.net/1959.3/439405 https://doi.org/10.1093/mnras/stv2453 |
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ftswinburne:tle:e633c281-8c1b-425e-a72f-d9c78798977b:28f49f06-0da8-44be-9edc-ad1dd0a9c582:1 2023-05-15T18:11:27+02:00 The SAMI galaxy survey: Can we trust aperture corrections to predict star formation? Richards, S. N. Bryant, J. J. Croom, S. M. Hopkins, A. M. Schaefer, A. L. Bland-Hawthorn, J. Allen, J. T. Brough, S. Cecil, G. Cortese, L. Fogarty, L. M. R. Gunawardhana, M. L. P. Goodwin, M. Green, A. W. Ho, I.-T. Kewley, L. J. Konstantopoulos, I. S. Lawrence, J. S. Lorente, N. P. F. Medling, A. M. Owers, M. S. Sharp, R. Sweet, S. M. Taylor, E. N. Swinburne University of Technology 2016 http://hdl.handle.net/1959.3/439405 https://doi.org/10.1093/mnras/stv2453 unknown Oxford University http://purl.org/au-research/grants/arc/CE110001020 http://purl.org/au-research/grants/arc/FT100100457 http://purl.org/au-research/grants/arc/FS110200013 http://purl.org/au-research/grants/arc/FT140100255 http://purl.org/au-research/grants/arc/DP130100664 http://hdl.handle.net/1959.3/439405 https://doi.org/10.1093/mnras/stv2453 This article has been accepted for publication in the Monthly Notices of the Royal Astronomical Society. Copyright © 2015 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. 455, no. 3 (Jan 2016), pp. 2826-2838 Journal article 2016 ftswinburne https://doi.org/10.1093/mnras/stv2453 2019-09-07T21:32:30Z In the low-redshift Universe (z < 0.3), our view of galaxy evolution is primarily based on fibre optic spectroscopy surveys. Elaborate methods have been developed to address aperture effects when fixed aperture sizes only probe the inner regions for galaxies of ever decreasing redshift or increasing physical size. These aperture corrections rely on assumptions about the physical properties of galaxies. The adequacy of these aperture corrections can be tested with integralfield spectroscopic data. We use integral-field spectra drawn from 1212 galaxies observed as part of the SAMI Galaxy Survey to investigate the validity of two aperture correction methods that attempt to estimate a galaxy's total instantaneous star formation rate.We show that biases arise when assuming that instantaneous star formation is traced by broad-band imaging, and when the aperture correction is built only from spectra of the nuclear region of galaxies. These biases may be significant depending on the selection criteria of a survey sample. Understanding the sensitivities of these aperture corrections is essential for correct handling of systematic errors in galaxy evolution studies. Article in Journal/Newspaper sami Swinburne University of Technology: Swinburne Research Bank Monthly Notices of the Royal Astronomical Society 455 3 2826 2838 |
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Swinburne University of Technology: Swinburne Research Bank |
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ftswinburne |
language |
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description |
In the low-redshift Universe (z < 0.3), our view of galaxy evolution is primarily based on fibre optic spectroscopy surveys. Elaborate methods have been developed to address aperture effects when fixed aperture sizes only probe the inner regions for galaxies of ever decreasing redshift or increasing physical size. These aperture corrections rely on assumptions about the physical properties of galaxies. The adequacy of these aperture corrections can be tested with integralfield spectroscopic data. We use integral-field spectra drawn from 1212 galaxies observed as part of the SAMI Galaxy Survey to investigate the validity of two aperture correction methods that attempt to estimate a galaxy's total instantaneous star formation rate.We show that biases arise when assuming that instantaneous star formation is traced by broad-band imaging, and when the aperture correction is built only from spectra of the nuclear region of galaxies. These biases may be significant depending on the selection criteria of a survey sample. Understanding the sensitivities of these aperture corrections is essential for correct handling of systematic errors in galaxy evolution studies. |
author2 |
Swinburne University of Technology |
format |
Article in Journal/Newspaper |
author |
Richards, S. N. Bryant, J. J. Croom, S. M. Hopkins, A. M. Schaefer, A. L. Bland-Hawthorn, J. Allen, J. T. Brough, S. Cecil, G. Cortese, L. Fogarty, L. M. R. Gunawardhana, M. L. P. Goodwin, M. Green, A. W. Ho, I.-T. Kewley, L. J. Konstantopoulos, I. S. Lawrence, J. S. Lorente, N. P. F. Medling, A. M. Owers, M. S. Sharp, R. Sweet, S. M. Taylor, E. N. |
spellingShingle |
Richards, S. N. Bryant, J. J. Croom, S. M. Hopkins, A. M. Schaefer, A. L. Bland-Hawthorn, J. Allen, J. T. Brough, S. Cecil, G. Cortese, L. Fogarty, L. M. R. Gunawardhana, M. L. P. Goodwin, M. Green, A. W. Ho, I.-T. Kewley, L. J. Konstantopoulos, I. S. Lawrence, J. S. Lorente, N. P. F. Medling, A. M. Owers, M. S. Sharp, R. Sweet, S. M. Taylor, E. N. The SAMI galaxy survey: Can we trust aperture corrections to predict star formation? |
author_facet |
Richards, S. N. Bryant, J. J. Croom, S. M. Hopkins, A. M. Schaefer, A. L. Bland-Hawthorn, J. Allen, J. T. Brough, S. Cecil, G. Cortese, L. Fogarty, L. M. R. Gunawardhana, M. L. P. Goodwin, M. Green, A. W. Ho, I.-T. Kewley, L. J. Konstantopoulos, I. S. Lawrence, J. S. Lorente, N. P. F. Medling, A. M. Owers, M. S. Sharp, R. Sweet, S. M. Taylor, E. N. |
author_sort |
Richards, S. N. |
title |
The SAMI galaxy survey: Can we trust aperture corrections to predict star formation? |
title_short |
The SAMI galaxy survey: Can we trust aperture corrections to predict star formation? |
title_full |
The SAMI galaxy survey: Can we trust aperture corrections to predict star formation? |
title_fullStr |
The SAMI galaxy survey: Can we trust aperture corrections to predict star formation? |
title_full_unstemmed |
The SAMI galaxy survey: Can we trust aperture corrections to predict star formation? |
title_sort |
sami galaxy survey: can we trust aperture corrections to predict star formation? |
publisher |
Oxford University |
publishDate |
2016 |
url |
http://hdl.handle.net/1959.3/439405 https://doi.org/10.1093/mnras/stv2453 |
genre |
sami |
genre_facet |
sami |
op_source |
Monthly Notices of the Royal Astronomical Society, Vol. 455, no. 3 (Jan 2016), pp. 2826-2838 |
op_relation |
http://purl.org/au-research/grants/arc/CE110001020 http://purl.org/au-research/grants/arc/FT100100457 http://purl.org/au-research/grants/arc/FS110200013 http://purl.org/au-research/grants/arc/FT140100255 http://purl.org/au-research/grants/arc/DP130100664 http://hdl.handle.net/1959.3/439405 https://doi.org/10.1093/mnras/stv2453 |
op_rights |
This article has been accepted for publication in the Monthly Notices of the Royal Astronomical Society. Copyright © 2015 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/stv2453 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
455 |
container_issue |
3 |
container_start_page |
2826 |
op_container_end_page |
2838 |
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1766184110925021184 |