The SCUBA HAlf Degree Extragalactic Survey - III. Identification of radio and mid-infrared counterparts to submillimetre galaxies

Ivison, R. J.; Greve, T. R.; Dunlop, James; Peacock, J. A.; Egami, Eiichi; Smail, Ian; Ibar, E.; Kampen, E. van; Aretxaga, I.; Babbedge, T.; Biggs, A. D.; Blain, A. W.; Chapman, Scott; Clements, D. L.; Coppin, K. E. K.; Farrah, D.; Halpern, M.; Hughes, D. H.; Jarvis, Matt J.; Jenness, Tim; Jones, JB; Mortier, A. M. J.; Oliver, S.; Papovich, C.; Pérez‐González, Pablo G.; Pope, Alexandra; Rawlings, Steve; Rieke, G. H.; Rowan‐Robinson, M.; Savage, Richard S.; Scott, D.; Seigar, Marc S.; Serjeant, S.; Simpson, Chris; Stevens, J. A.; Vaccari, M.; Wagg, Jeff; Willott, Chris J.

doi:10.1111/j.1365-2966.2007.12044.x

Cited by 285 publications

(349 citation statements)

References 107 publications

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“…A matching radius of 1 was adopted (85% of matches are found within 0 5) to account for both the formal uncertainty on the ALMA positions (σ ∼ 0 14 for a 4σ detection; see Ivison et al 2007) and any intrinsic spatial offset resulting from dust obscuration (σ ∼ 0. 3  , with offsets of up to 2 to individual components; Chen et al 2015).…”

Section: Optical and Near-infrared Photometrymentioning

confidence: 99%

“…Thus, a possible explanation for the higher median redshift of the SMGs presented here, relative to ALESS, is that brighter SMGs are preferentially found at higher redshift. Indeed, a number of authors previously suggested that 870 μm brighter sources may lie at higher redshift (e.g., Ivison et al 2002Ivison et al , 2007Koprowski et al 2014).…”

Section: Photometric Redshift Distribution Of Smgsmentioning

confidence: 99%

“…However, the low angular resolution of single-dish facilities (typically ∼15″) means that identifying the sub-mm galaxies (SMGs; S 850 > 1 mJy) that are 1 responsible for each sub-mm source is not possible without significant assumptions about the properties of these sources at other wavelengths. Typically, the correlation between radio and far-infrared emission (e.g., Ivison et al 1998Ivison et al , 2000 was exploited to provide statistical identification of the counterparts to sub-mm sources, since facilities such as the Very Large Array (VLA) can provide the arcsecond resolution imaging that is required to identify individual galaxies (Ivison et al , 2007Bertoldi et al 2007;Biggs et al 2011;Lindner et al 2011).…”

Section: Introductionmentioning

confidence: 99%

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The SCUBA-2 Cosmology Legacy Survey: Multi-wavelength Properties of ALMA-identified Submillimeter Galaxies in UKIDSS UDS

Simpson

Smail

Swinbank

et al. 2017

ApJ

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113

139

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractWe 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 farinfrared 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 75 m 0  l 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 -+ ×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 multiwavelength study of dusty starbursts and reddening-sensitive tracers of star formation.

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Section: Optical and Near-infrared Photometrymentioning

confidence: 99%

Section: Photometric Redshift Distribution Of Smgsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The SCUBA-2 Cosmology Legacy Survey: Multi-wavelength Properties of ALMA-identified Submillimeter Galaxies in UKIDSS UDS

Simpson

Smail

Swinbank

et al. 2017

ApJ

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113

139

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“…This has the potential to bias the redshift distribution to z 3.5  , especially if a significant fraction of submillimeter sources do not have multi-wavelength counterparts. Indeed, in single-dish 850 μmsurveys, up to 50% of all submillimeter sources are undetected at radio wavelengths (e.g., Ivison et al 2005Ivison et al , 2007Biggs et al 2011). Some progress can be made by targeting lensed sources whose multi-wavelength identifications are less ambiguous, and indeed spectroscopic redshifts have been derived for SMGs up to z 5 (e.g., Weiß et al 2013).…”

Section: Introductionmentioning

confidence: 99%

An ALMA Survey of Submillimeter Galaxies in the Extended Chandra Deep Field South: Spectroscopic Redshifts

Danielson

Swinbank

Smail

et al. 2017

ApJ

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We present spectroscopic redshifts of mJy submillimeter galaxies (SMGs), which have been identified from the ALMA follow-up observations of 870 μm detected sources in the Extended Chandra Deep Field South (the ALMA-LESS survey). We derive spectroscopic redshifts for 52 SMGs, with a median of z = 2.4 ± 0.1. However, the distribution features a high-redshift tail, with ∼23% of the SMGs at . Spectral diagnostics suggest that the SMGs are young starbursts, and the velocity offsets between the nebular emission and UV ISM absorption lines suggest that many are driving winds, with velocity offsets of up to 2000 km s−1. Using the spectroscopic redshifts and the extensive UV-to-radio photometry in this field, we produce optimized spectral energy distributions (SEDs) using Magphys, and use the SEDs to infer a median stellar mass of = (6 ± 1)× 1010 M for our SMGs with spectroscopic redshift. By combining these stellar masses with the star formation rates (measured from the far-infrared SEDs), we show that SMGs (on average) lie a factor of ∼5 above the so-called “main sequence” at . We provide this library of 52 template fits with robust and uniquely well-sampled SEDs as a resource for future studies of SMGs, and also release the spectroscopic catalog of ∼2000 (mostly infrared-selected) galaxies targeted as part of the spectroscopic campaign.

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“…• 00 ′ 00 ′′ ) is one of two regions in SHADES where number count (Coppin et al 2006), redshift distribution (Aretxaga et al 2007;Ivison et al 2007;Clements et al 2008) and physical parameters of SMGs (Clements et al 2008) were investigated. In this study, we also investigate number count and physical properties of SMGs in blank-field using 850 µm imaging data centered at (α 2000 , δ 2000 ) = (02 h 18 m 07 s , -04…”

Section: Corresponding Author: H Seomentioning

confidence: 99%

Properties of the Scuba-2 850㎛ Sources in the XMM-LSS Field

Seo¹,

Jeong²,

Kim³

et al. 2017

Journal of The Korean Astronomical Society

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Abstract:We carry out the study of 850 µm sources in a part of the XMM-LSS field. The 850 µm imaging data were obtained by the SCUBA-2 on the James Clerk Maxwell Telescope (JCMT) for three days in July 2015 with an integration time of 6.1 hours, covering a circular area with a radius of 15 ′ . We choose the central area up to a radius of 9.′ 15 for the study, where the noise distribution is relatively uniform. The root mean square (rms) noise at the center is 2.7 mJy. We identify 17 sources with S/N > 3.5. Differential number count is estimated in flux range between 3.5 and 9.0 mJy after applying various corrections derived by imaging simulations, which is consistent with previous studies. For detailed study on the individual sources, we select three sources with more reliable measurements (S/N > 4.5), and construct their spectral energy distributions (SEDs) from optical to far-infrared band. Redshift distribution of the sources ranges from 0.36 to 3.28, and their physical parameters are extracted using MAGPHYS model, which yield infrared luminosity L IR = 10 11.3 −10 13.4 L ⊙ , star formation rate SFR = 10 1.3 −10 3.2 M ⊙ yr −1 and dust temperature T D = 30−53 K. We investigate the correlation between L IR and T D , which appears to be consistent with previous studies.

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The SCUBA HAlf Degree Extragalactic Survey - III. Identification of radio and mid-infrared counterparts to submillimetre galaxies

Cited by 285 publications

References 107 publications

The SCUBA-2 Cosmology Legacy Survey: Multi-wavelength Properties of ALMA-identified Submillimeter Galaxies in UKIDSS UDS

The SCUBA-2 Cosmology Legacy Survey: Multi-wavelength Properties of ALMA-identified Submillimeter Galaxies in UKIDSS UDS

An ALMA Survey of Submillimeter Galaxies in the Extended Chandra Deep Field South: Spectroscopic Redshifts

Properties of the Scuba-2 850㎛ Sources in the XMM-LSS Field

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