A reassessment of the redshift distribution and physical properties of luminous (sub-)millimetre galaxies
Motivated by the current controversy over the redshift distribution and physical properties of luminous (sub-)mm sources, we have undertaken a new study of the brightest sample of unlensed (sub-)mm sources with pre-ALMA interferometric follow-up in the COSMOS field. Exploiting the very latest multi-...
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ftdatacite:10.48550/arxiv.1312.1173 2023-05-15T18:23:08+02:00 A reassessment of the redshift distribution and physical properties of luminous (sub-)millimetre galaxies Koprowski, M. P. Dunlop, J. S. Michalowski, M. J. Cirasuolo, M. Bowler, R. A. A. 2013 https://dx.doi.org/10.48550/arxiv.1312.1173 https://arxiv.org/abs/1312.1173 unknown arXiv https://dx.doi.org/10.1093/mnras/stu1402 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences article-journal Article ScholarlyArticle Text 2013 ftdatacite https://doi.org/10.48550/arxiv.1312.1173 https://doi.org/10.1093/mnras/stu1402 2022-04-01T13:06:23Z Motivated by the current controversy over the redshift distribution and physical properties of luminous (sub-)mm sources, we have undertaken a new study of the brightest sample of unlensed (sub-)mm sources with pre-ALMA interferometric follow-up in the COSMOS field. Exploiting the very latest multi-frequency supporting data, we find that this sample displays a redshift distribution indistinguishable from that of the lensed sources uncovered with the South Pole Telescope (SPT), with z_median ~ 3.5. We also find that, over the redshift range z ~ 2-6 the median stellar mass of the most luminous (sub-)mm sources is M_* ~ 3 * 10^11 M_odot, yielding a typical specific star-formation rate sSFR ~ 3 Gyr^-1. Consistent with recent ALMA and SMA studies, we confirm that source blending is not a serious issue in the study of luminous (sub-)mm sources uncovered by ground-based, single-dish surveys; only ~ 10-15% of bright (S_850 ~ 5 - 10 mJy) (sub-)mm sources arise from significant (i.e. >20%) blends, and so our conclusions are largely unaffected by whether we adopt the original single-dish mm/sub-mm flux-densities/positions, or the interferometric data. Our results suggest that apparent disagreements over the redshift distribution of (sub-)mm sources are a result of "down-sizing" in dust-enshrouded star-formation, consistent with existing knowledge of the star-formation histories of massive galaxies. They also indicate that extreme star-forming galaxies at high redshift are, on average, subject to the same star-formation rate-limiting processes as less luminous objects, and lie on the "main sequence" of star-forming galaxies at z>3. : 13 pages (+13 pages of appendix), 12 figures, accepted to MNRAS Text South pole DataCite Metadata Store (German National Library of Science and Technology) South Pole |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences |
spellingShingle |
Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences Koprowski, M. P. Dunlop, J. S. Michalowski, M. J. Cirasuolo, M. Bowler, R. A. A. A reassessment of the redshift distribution and physical properties of luminous (sub-)millimetre galaxies |
topic_facet |
Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences |
description |
Motivated by the current controversy over the redshift distribution and physical properties of luminous (sub-)mm sources, we have undertaken a new study of the brightest sample of unlensed (sub-)mm sources with pre-ALMA interferometric follow-up in the COSMOS field. Exploiting the very latest multi-frequency supporting data, we find that this sample displays a redshift distribution indistinguishable from that of the lensed sources uncovered with the South Pole Telescope (SPT), with z_median ~ 3.5. We also find that, over the redshift range z ~ 2-6 the median stellar mass of the most luminous (sub-)mm sources is M_* ~ 3 * 10^11 M_odot, yielding a typical specific star-formation rate sSFR ~ 3 Gyr^-1. Consistent with recent ALMA and SMA studies, we confirm that source blending is not a serious issue in the study of luminous (sub-)mm sources uncovered by ground-based, single-dish surveys; only ~ 10-15% of bright (S_850 ~ 5 - 10 mJy) (sub-)mm sources arise from significant (i.e. >20%) blends, and so our conclusions are largely unaffected by whether we adopt the original single-dish mm/sub-mm flux-densities/positions, or the interferometric data. Our results suggest that apparent disagreements over the redshift distribution of (sub-)mm sources are a result of "down-sizing" in dust-enshrouded star-formation, consistent with existing knowledge of the star-formation histories of massive galaxies. They also indicate that extreme star-forming galaxies at high redshift are, on average, subject to the same star-formation rate-limiting processes as less luminous objects, and lie on the "main sequence" of star-forming galaxies at z>3. : 13 pages (+13 pages of appendix), 12 figures, accepted to MNRAS |
format |
Text |
author |
Koprowski, M. P. Dunlop, J. S. Michalowski, M. J. Cirasuolo, M. Bowler, R. A. A. |
author_facet |
Koprowski, M. P. Dunlop, J. S. Michalowski, M. J. Cirasuolo, M. Bowler, R. A. A. |
author_sort |
Koprowski, M. P. |
title |
A reassessment of the redshift distribution and physical properties of luminous (sub-)millimetre galaxies |
title_short |
A reassessment of the redshift distribution and physical properties of luminous (sub-)millimetre galaxies |
title_full |
A reassessment of the redshift distribution and physical properties of luminous (sub-)millimetre galaxies |
title_fullStr |
A reassessment of the redshift distribution and physical properties of luminous (sub-)millimetre galaxies |
title_full_unstemmed |
A reassessment of the redshift distribution and physical properties of luminous (sub-)millimetre galaxies |
title_sort |
reassessment of the redshift distribution and physical properties of luminous (sub-)millimetre galaxies |
publisher |
arXiv |
publishDate |
2013 |
url |
https://dx.doi.org/10.48550/arxiv.1312.1173 https://arxiv.org/abs/1312.1173 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://dx.doi.org/10.1093/mnras/stu1402 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1312.1173 https://doi.org/10.1093/mnras/stu1402 |
_version_ |
1766202568361377792 |