The SCUBA-2 Cosmology Legacy Survey: Multi-wavelength Properties of ALMA-identified Submillimeter Galaxies in UKIDSS UDS. Simpson, J. M., Smail, I., Swinbank, A. M., Ivison, R. J., Dunlop, J. S., Geach, J. E., Almaini, O., Arumugam, V., Bremer, M. N., Chen, C., Conselice, C., Coppin, K. E. K., Farrah, D., Ibar, E., Hartley, W. G., Ma, C. J., Michałowski, M. J., Scott, D., Spaans, M., Thomson, A. P., & van der Werf, P. P. The Astrophysical Journal, 839:58, April, 2017. ![The SCUBA-2 Cosmology Legacy Survey: Multi-wavelength Properties of ALMA-identified Submillimeter Galaxies in UKIDSS UDS [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex We present a multi-wavelength analysis of 52 submillimeter galaxies (SMGs), identified using ALMA 870 μm continuum imaging in a pilot program to precisely locate bright SCUBA-2-selected submillimeter sources in the UKIDSS Ultra Deep Survey (UDS) field. Using the available deep (especially near-infrared) panoramic imaging of the UDS field at optical-to-radio wavelengths we characterize key properties of the SMG population. The median photometric redshift of the bright ALMA/SCUBA-2 UDS (AS2UDS) SMGs that are detected in a sufficient number of wavebands to derive a robust photometric redshift is z = 2.65 ± 0.13. However, similar to previous studies, 27% of the SMGs are too faint at optical-to-near-infrared wavelengths to derive a reliable photometric redshift. Assuming that these SMGs lie at z ≳ 3 raises the median redshift of the full sample to z = 2.9 ± 0.2. A subset of 23 unlensed, bright AS2UDS SMGs have sizes measured from resolved imaging of their rest-frame far-infrared emission. We show that the extent and luminosity of the far-infrared emission are consistent with the dust emission arising from regions that are, on average, optically thick at a wavelength of \λ \0≥slant 75 μ \\m\\ (1σ dispersion of 55-90 μm). Using the dust masses derived from our optically thick spectral energy distribution models, we determine that these galaxies have a median hydrogen column density of N H = 9.8\\-0.7+1.4 × 1023 cm-2, or a corresponding median V-band obscuration of A v = 540\\-40+80 mag, averaged along the line of sight to the source of their rest-frame ∼200 μm emission. We discuss the implications of this extreme attenuation by dust for the multi-wavelength study of dusty starbursts and reddening-sensitive tracers of star formation.
@article{simpson_scuba-2_2017,
title = {The {SCUBA}-2 {Cosmology} {Legacy} {Survey}: {Multi}-wavelength {Properties} of {ALMA}-identified {Submillimeter} {Galaxies} in {UKIDSS} {UDS}},
volume = {839},
issn = {0004-637X},
shorttitle = {The {SCUBA}-2 {Cosmology} {Legacy} {Survey}},
url = {http://adsabs.harvard.edu/abs/2017ApJ...839...58S},
doi = {10.3847/1538-4357/aa65d0},
abstract = {We present a multi-wavelength analysis of 52 submillimeter galaxies
(SMGs), identified using ALMA 870 μm continuum imaging in a pilot
program to precisely locate bright SCUBA-2-selected submillimeter
sources in the UKIDSS Ultra Deep Survey (UDS) field. Using the available
deep (especially near-infrared) panoramic imaging of the UDS field at
optical-to-radio wavelengths we characterize key properties of the SMG
population. The median photometric redshift of the bright ALMA/SCUBA-2
UDS (AS2UDS) SMGs that are detected in a sufficient number of wavebands
to derive a robust photometric redshift is z = 2.65 ± 0.13.
However, similar to previous studies, 27\% of the SMGs are too faint at
optical-to-near-infrared wavelengths to derive a reliable photometric
redshift. Assuming that these SMGs lie at z ≳ 3 raises the median
redshift of the full sample to z = 2.9 ± 0.2. A subset of 23
unlensed, bright AS2UDS SMGs have sizes measured from resolved imaging
of their rest-frame far-infrared emission. We show that the extent and
luminosity of the far-infrared emission are consistent with the dust
emission arising from regions that are, on average, optically thick at a
wavelength of \{λ \}0≥slant 75 μ \{\{m\}\} (1σ
dispersion of 55-90 μm). Using the dust masses derived from our
optically thick spectral energy distribution models, we determine that
these galaxies have a median hydrogen column density of N H =
9.8\{\}-0.7+1.4 × 1023
cm-2, or a corresponding median V-band obscuration of A
v = 540\{\}-40+80 mag, averaged along the
line of sight to the source of their rest-frame ∼200 μm emission.
We discuss the implications of this extreme attenuation by dust for the
multi-wavelength study of dusty starbursts and reddening-sensitive
tracers of star formation.},
urldate = {2020-06-09},
journal = {The Astrophysical Journal},
author = {Simpson, J. M. and Smail, Ian and Swinbank, A. M. and Ivison, R. J. and Dunlop, J. S. and Geach, J. E. and Almaini, O. and Arumugam, V. and Bremer, M. N. and Chen, Chian-Chou and Conselice, C. and Coppin, K. E. K. and Farrah, D. and Ibar, E. and Hartley, W. G. and Ma, C. J. and Michałowski, M. J. and Scott, D. and Spaans, M. and Thomson, A. P. and van der Werf, P. P.},
month = apr,
year = {2017},
keywords = {galaxies: evolution, galaxies: high-redshift, galaxies: starburst, submillimeter: galaxies},
pages = {58},
}
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P."],"bibdata":{"bibtype":"article","type":"article","title":"The SCUBA-2 Cosmology Legacy Survey: Multi-wavelength Properties of ALMA-identified Submillimeter Galaxies in UKIDSS UDS","volume":"839","issn":"0004-637X","shorttitle":"The SCUBA-2 Cosmology Legacy Survey","url":"http://adsabs.harvard.edu/abs/2017ApJ...839...58S","doi":"10.3847/1538-4357/aa65d0","abstract":"We present a multi-wavelength analysis of 52 submillimeter galaxies (SMGs), identified using ALMA 870 μm continuum imaging in a pilot program to precisely locate bright SCUBA-2-selected submillimeter sources in the UKIDSS Ultra Deep Survey (UDS) field. Using the available deep (especially near-infrared) panoramic imaging of the UDS field at optical-to-radio wavelengths we characterize key properties of the SMG population. The median photometric redshift of the bright ALMA/SCUBA-2 UDS (AS2UDS) SMGs that are detected in a sufficient number of wavebands to derive a robust photometric redshift is z = 2.65 ± 0.13. However, similar to previous studies, 27% of the SMGs are too faint at optical-to-near-infrared wavelengths to derive a reliable photometric redshift. Assuming that these SMGs lie at z ≳ 3 raises the median redshift of the full sample to z = 2.9 ± 0.2. A subset of 23 unlensed, bright AS2UDS SMGs have sizes measured from resolved imaging of their rest-frame far-infrared emission. We show that the extent and luminosity of the far-infrared emission are consistent with the dust emission arising from regions that are, on average, optically thick at a wavelength of \\λ \\0≥slant 75 μ \\\\m\\\\ (1σ dispersion of 55-90 μm). Using the dust masses derived from our optically thick spectral energy distribution models, we determine that these galaxies have a median hydrogen column density of N H = 9.8\\\\-0.7+1.4 × 1023 cm-2, or a corresponding median V-band obscuration of A v = 540\\\\-40+80 mag, averaged along the line of sight to the source of their rest-frame ∼200 μm emission. 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Using the available\ndeep (especially near-infrared) panoramic imaging of the UDS field at\noptical-to-radio wavelengths we characterize key properties of the SMG\npopulation. The median photometric redshift of the bright ALMA/SCUBA-2\nUDS (AS2UDS) SMGs that are detected in a sufficient number of wavebands\nto derive a robust photometric redshift is z = 2.65 ± 0.13.\nHowever, similar to previous studies, 27\\% of the SMGs are too faint at\noptical-to-near-infrared wavelengths to derive a reliable photometric\nredshift. Assuming that these SMGs lie at z ≳ 3 raises the median\nredshift of the full sample to z = 2.9 ± 0.2. A subset of 23\nunlensed, bright AS2UDS SMGs have sizes measured from resolved imaging\nof their rest-frame far-infrared emission. We show that the extent and\nluminosity of the far-infrared emission are consistent with the dust\nemission arising from regions that are, on average, optically thick at a\nwavelength of \\{λ \\}0≥slant 75 μ \\{\\{m\\}\\} (1σ\ndispersion of 55-90 μm). Using the dust masses derived from our\noptically thick spectral energy distribution models, we determine that\nthese galaxies have a median hydrogen column density of N H =\n9.8\\{\\}-0.7+1.4 × 1023\ncm-2, or a corresponding median V-band obscuration of A\nv = 540\\{\\}-40+80 mag, averaged along the\nline of sight to the source of their rest-frame ∼200 μm emission.\nWe discuss the implications of this extreme attenuation by dust for the\nmulti-wavelength study of dusty starbursts and reddening-sensitive\ntracers of star formation.},\n\turldate = {2020-06-09},\n\tjournal = {The Astrophysical Journal},\n\tauthor = {Simpson, J. M. and Smail, Ian and Swinbank, A. M. and Ivison, R. J. and Dunlop, J. S. and Geach, J. 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