Interferometric 890 μm Images of High-Redshift Submillimeter Galaxies

Iono, Daisuke; Peck, A. B.; Pope, Alexandra; Borys, C.; Scott, D.; Wilner, David J.; Gurwell, M. A.; Ho, Paul T. P.; Yun, Min S.; Matsushita, Satoki; Petitpas, G.; Dunlop, James; Elvis, M.; Blain, A. W.; Floc’h, E. Le

doi:10.1086/503290

Cited by 78 publications

(120 citation statements)

References 34 publications

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“…This is particularly interesting for this sample of the brightest sources in the AzTEC/COSMOS catalog because it rules out blends of multiple fainter sources as a significant contributor to the upper end of the observed SMG luminosity function. It also agrees with previous interferometric measurements of the angular extent of the millimeter (Downes et al 1999;Genzel et al 2003;Downes & Solomon 2003;Kneib et al 2005;Tacconi et al 2006) and submillimeter (Iono et al 2006) emission from SMGs, and marginally with those of the radio continuum (Chapman et al 2004).…”

Section: Discussionsupporting

confidence: 92%

“…Previous interferometric observations at millimeter (Downes et al 1999;Frayer et al 2000;Dannerbauer et al 2002;Downes & Solomon 2003;Genzel et al 2003;Kneib et al 2005;Greve et al 2005;Tacconi et al 2006) and submillimeter (Iono et al 2006) wavelengths have identified unambiguous counterparts for increasing numbers of radio-detected SMGs, and have confirmed the radio-submillimeter association. However, to date there has been no reliable highresolution followup of a uniformly selected sample including radio-undetected SMGs, and the true nature of these sources therefore remains elusive.…”

Section: Introductionmentioning

confidence: 87%

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Evidence for a population of high-redshift submillimeter galaxies from interferometric imaging

Peck¹,

Younger²,

Fazio³

2008

Proceedings of From Planets to Dark Energy: The Modern Radio Universe — PoS(MRU)

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We have used the Submillimeter Array to image a flux limited sample of seven submillimeter galaxies, selected by the AzTEC camera on the JCMT at 1.1 mm, in the COSMOS field at 890 µm with ∼ 2 ′′ resolution. All of the sources -two radio-bright and five radio-dim -are detected as single point-sources at high significance (> 6σ), with positions accurate to ∼ 0.2 ′′ that enable counterpart identification at other wavelengths observed with similarly high angular resolution. All seven have IRAC counterparts, but only two have secure counterparts in deep HST/ACS imaging. As compared to the two radio-bright sources in the sample, and those in previous studies, the five radio-dim sources in the sample (1) have systematically higher submillimeter-to-radio flux ratios, (2) have lower IRAC 3.6-8.0 µm fluxes, and (3) are not detected at 24µm. These properties, combined with size constraints at 890 µm (θ ∼ < 1.2 ′′ ), suggest that the radio-dim submillimeter galaxies represent a population of very dusty starbursts, with physical scales similar to local ultraluminous infrared galaxies, and an average redshift higher than radio-bright sources.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 87%

Evidence for a population of high-redshift submillimeter galaxies from interferometric imaging

Peck¹,

Younger²,

Fazio³

2008

Proceedings of From Planets to Dark Energy: The Modern Radio Universe — PoS(MRU)

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“…Before the improved sensitivities provided by the upgraded IRAM PdBI or ALMA, interferometric follow-up at millimeter or submillimeter wavelengths was slow and expensive. Only about 50 SMGs have been properly identified in various survey fields (Downes et al 1999, Frayer et al 2000Dannerbauer et al 2002;Downes & Solomon 2003;Genzel et al 2003;Kneib et al 2005;Greve et al 2005;Tacconi et al 2006;Sheth et al 2004, Iono et al 2006Younger et al 2007Younger et al , 2009Aravena et al 2010a;Ikarashi et al 2011;Tamura et al 2010;Hatsukade et al 2010;Wang et al 2011;Chen et al 2011;Neri et al 2003;Chapman et al 2008;Smolčić et al 2012). The largest statistically significant, signal-to-noise-and flux-limited sample of interferometrically identified SMGs contains 17 sources drawn from the AzTEC/JCMT survey of 0.15 • within the COSMOS field (Younger et al 2007(Younger et al , 2009).…”

Section: Identifying Multi-wavelength Counterparts To Smgsmentioning

confidence: 99%

“…Ivison et al 2002Ivison et al , 2005Pope et al 2006;Hainline et al 2009;Yun et al 2008Yun et al , 2012. Deep intermediate-resolution radio observations, which are less time consuming than similar mm-wave observations, but are expected to trace the same physical processes (given the IR-radio correlation; e.g.…”

Section: The Biases Of Assigning Counterparts To Single-dish Detectedmentioning

confidence: 99%

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Millimeter imaging of submillimeter galaxies in the COSMOS field: redshift distribution

Smolčić

Aravena

Navarrete

et al. 2012

A&A

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138

269

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We present new IRAM Plateau de Bure interferometer (PdBI) 1.3 mm continuum observations at ∼1.5 resolution of 28 submillimeter galaxies (SMGs), previously discovered with the 870 μm bolometer LABOCA at the APEX telescope from the central 0.7 deg 2 of the COSMOS field. Nineteen out of the 28 LABOCA sources were detected with PdBI at a > ∼ 3σ level of ≈1.4 mJy/beam. A combined analysis of this new sample with existing interferometrically identified SMGs in the COSMOS field yields the following results: i) > ∼ 15%, and possibly up to ∼40% of single-dish detected SMGs consist of multiple sources; ii) statistical analysis of multi-wavelength counterparts to single-dish SMGs shows that only ∼50% have real radio or IR counterparts; iii) ∼18% of interferometric SMGs have either no multi-wavelength counterpart or only a radio-counterpart; and iv) ∼50-70% of z > ∼ 3 SMGs have no radio counterparts (down to an rms of 7-12 μJy at 1.4 GHz). Using the exact interferometric positions to identify the multi-wavelength counterparts allows us to determine accurate photometric redshifts for these sources. The redshift distributions of the combined and the individual 1.1 mm and 870 μm selected samples shows a higher mean and a broader width than those derived in previous studies. This study finds that on average brighter and/or mm-selected SMGs are located at higher redshifts, consistent with previous studies. The mean redshift for the 1.1 mm selected sample (z = 3.1 ± 0.4) is tentatively higher than that for the 870 μm selected sample (z = 2.6 ± 0.4). Based on our nearly complete sample of AzTEC 1.1 mm SMGs in a 0.15 deg 2 area, we infer a higher surface density of z > ∼ 4 SMGs than predicted by current cosmological models. In summary, our findings imply that interferometric identifications at (sub-)millimeter wavelengths are crucial to build statistically complete and unbiased samples of SMGs.

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An ALMA survey of submillimeter galaxies in the COSMOS field: Multiwavelength counterparts and redshift distribution

Brisbin

Miettinen

Aravena

et al. 2017

A&A

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We carried out targeted ALMA observations of 129 fields in the COSMOS region at 1.25 mm, detecting 152 galaxies at S/N≥5 with an average continuum RMS of 150 µJy. These fields represent a S/N-limited sample of AzTEC / ASTE sources with 1.1 mm S/N≥4 over an area of 0.72 square degrees. Given ALMA's fine resolution and the exceptional spectroscopic and multiwavelength photometric data available in COSMOS, this survey allows us unprecedented power in identifying submillimeter galaxy counterparts and determining their redshifts through spectroscopic or photometric means. In addition to 30 sources with prior spectroscopic redshifts, we identified redshifts for 113 galaxies through photometric methods and an additional nine sources with lower limits, which allowed a statistically robust determination of the redshift distribution. We have resolved 33 AzTEC sources into multi-component systems and our redshifts suggest that nine are likely to be physically associated. Our overall redshift distribution peaks at z ∼2.0 with a high-redshift tail skewing the median redshift toz=2.48±0.05. We find that brighter millimeter sources are preferentially found at higher redshifts. Our faintest sources, with S 1.25mm <1.25 mJy, have a median redshift ofz=2.18±0.09, while the brightest sources, S 1.25mm >1.8 mJy, have a median redshift ofz=3.08±0.17. After accounting for spectral energy distribution shape and selection effects, these results are consistent with several previous submillimeter galaxy surveys, and moreover, support the conclusion that the submillimeter galaxy redshift distribution is sensitive to survey depth.

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Interferometric 890 μm Images of High-Redshift Submillimeter Galaxies

Cited by 78 publications

References 34 publications

Evidence for a population of high-redshift submillimeter galaxies from interferometric imaging

Evidence for a population of high-redshift submillimeter galaxies from interferometric imaging

Millimeter imaging of submillimeter galaxies in the COSMOS field: redshift distribution

An ALMA survey of submillimeter galaxies in the COSMOS field: Multiwavelength counterparts and redshift distribution

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