An ALMA survey of the S2CLS UDS field: Optically invisible submillimetre galaxies

Ian Smail; U. Dudzevičiūtė; S. M. Stach; O. Almaini; J. E. Birkin; S. C. Chapman; Chian-Chou Chen; J. E. Geach; B. Gullberg; J. A. Hodge; S. Ikarashi; R. J. Ivison; D. Scott; Chris Simpson; A. M. Swinbank; A. P. Thomson; F. Walter; J. L. Wardlow; P. van der Werf

doi:10.1093/mnras/stab283

An ALMA survey of the S2CLS UDS field: Optically invisible submillimetre galaxies

Ian Smail, U. Dudzevičiūtė, S. M. Stach, O. Almaini, J. E. Birkin, S. C. Chapman, Chian-Chou Chen, J. E. Geach, B. Gullberg, J. A. Hodge, S. Ikarashi, R. J. Ivison, D. Scott, Chris Simpson, A. M. Swinbank, A. P. Thomson, F. Walter, J. L. Wardlow, P. van der Werf

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Abstract

We analyse a robust sample of 30 near-infrared-faint (K>25.3, 5 sigma) submillimetre galaxies selected across a 0.96 deg^2 field, to investigate their properties and the cause of their lack of detectable optical/near-infrared emission. Our analysis exploits precise identifications based on ALMA 870um continuum imaging, combined with the very deep near-infrared imaging from the UKIDSS-UDS survey. We estimate that K>25.3 submillimetre galaxies represent 15+/-2 per cent of the total population brighter than S870=3.6mJy, with an expected surface density of ~450/deg^2 above S870>1mJy. As such they pose a source of contamination in surveys for both high-redshift "quiescent" galaxies and very-high-redshift Lyman-break galaxies. We show that these K-faint submillimetre galaxies are simply the tail of the broader submillimetre population, with comparable dust and stellar masses to K

Original language	English
Pages (from-to)	3426-3435
Journal	Monthly Notices of the Royal Astronomical Society
Volume	502
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stab283
Publication status	Published - 1 Apr 2021

Keywords

astro-ph.GA

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10.1093/mnras/stab283

2010.02250v1

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Smail, I., Dudzevičiūtė, U., Stach, S. M., Almaini, O., Birkin, J. E., Chapman, S. C., Chen, C-C., Geach, J. E., Gullberg, B., Hodge, J. A., Ikarashi, S., Ivison, R. J., Scott, D., Simpson, C., Swinbank, A. M., Thomson, A. P., Walter, F., Wardlow, J. L., & Werf, P. V. D. (2021). An ALMA survey of the S2CLS UDS field: Optically invisible submillimetre galaxies. Monthly Notices of the Royal Astronomical Society, 502(3), 3426-3435. https://doi.org/10.1093/mnras/stab283

@article{863506839cc2498a8d3bad31f0b210c5,

title = "An ALMA survey of the S2CLS UDS field: Optically invisible submillimetre galaxies",

abstract = "We analyse a robust sample of 30 near-infrared-faint (K>25.3, 5 sigma) submillimetre galaxies selected across a 0.96 deg^2 field, to investigate their properties and the cause of their lack of detectable optical/near-infrared emission. Our analysis exploits precise identifications based on ALMA 870um continuum imaging, combined with the very deep near-infrared imaging from the UKIDSS-UDS survey. We estimate that K>25.3 submillimetre galaxies represent 15+/-2 per cent of the total population brighter than S870=3.6mJy, with an expected surface density of ~450/deg^2 above S870>1mJy. As such they pose a source of contamination in surveys for both high-redshift {"}quiescent{"} galaxies and very-high-redshift Lyman-break galaxies. We show that these K-faint submillimetre galaxies are simply the tail of the broader submillimetre population, with comparable dust and stellar masses to K",

keywords = "astro-ph.GA",

author = "Ian Smail and U. Dudzevi{\v c}iūtė and Stach, {S. M.} and O. Almaini and Birkin, {J. E.} and Chapman, {S. C.} and Chian-Chou Chen and Geach, {J. E.} and B. Gullberg and Hodge, {J. A.} and S. Ikarashi and Ivison, {R. J.} and D. Scott and Chris Simpson and Swinbank, {A. M.} and Thomson, {A. P.} and F. Walter and Wardlow, {J. L.} and Werf, {P. van der}",

note = "9 pages, 4 figures. Submitted to MNRAS, comments welcome",

year = "2021",

month = apr,

day = "1",

doi = "10.1093/mnras/stab283",

language = "English",

volume = "502",

pages = "3426--3435",

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Smail, I, Dudzevičiūtė, U, Stach, SM, Almaini, O, Birkin, JE, Chapman, SC, Chen, C-C, Geach, JE, Gullberg, B, Hodge, JA, Ikarashi, S, Ivison, RJ, Scott, D, Simpson, C, Swinbank, AM, Thomson, AP, Walter, F, Wardlow, JL & Werf, PVD 2021, 'An ALMA survey of the S2CLS UDS field: Optically invisible submillimetre galaxies', Monthly Notices of the Royal Astronomical Society, vol. 502, no. 3, pp. 3426-3435. https://doi.org/10.1093/mnras/stab283

TY - JOUR

T1 - An ALMA survey of the S2CLS UDS field

T2 - Optically invisible submillimetre galaxies

AU - Smail, Ian

AU - Dudzevičiūtė, U.

AU - Stach, S. M.

AU - Almaini, O.

AU - Birkin, J. E.

AU - Chapman, S. C.

AU - Chen, Chian-Chou

AU - Geach, J. E.

AU - Gullberg, B.

AU - Hodge, J. A.

AU - Ikarashi, S.

AU - Ivison, R. J.

AU - Scott, D.

AU - Simpson, Chris

AU - Swinbank, A. M.

AU - Thomson, A. P.

AU - Walter, F.

AU - Wardlow, J. L.

AU - Werf, P. van der

N1 - 9 pages, 4 figures. Submitted to MNRAS, comments welcome

PY - 2021/4/1

Y1 - 2021/4/1

N2 - We analyse a robust sample of 30 near-infrared-faint (K>25.3, 5 sigma) submillimetre galaxies selected across a 0.96 deg^2 field, to investigate their properties and the cause of their lack of detectable optical/near-infrared emission. Our analysis exploits precise identifications based on ALMA 870um continuum imaging, combined with the very deep near-infrared imaging from the UKIDSS-UDS survey. We estimate that K>25.3 submillimetre galaxies represent 15+/-2 per cent of the total population brighter than S870=3.6mJy, with an expected surface density of ~450/deg^2 above S870>1mJy. As such they pose a source of contamination in surveys for both high-redshift "quiescent" galaxies and very-high-redshift Lyman-break galaxies. We show that these K-faint submillimetre galaxies are simply the tail of the broader submillimetre population, with comparable dust and stellar masses to K

AB - We analyse a robust sample of 30 near-infrared-faint (K>25.3, 5 sigma) submillimetre galaxies selected across a 0.96 deg^2 field, to investigate their properties and the cause of their lack of detectable optical/near-infrared emission. Our analysis exploits precise identifications based on ALMA 870um continuum imaging, combined with the very deep near-infrared imaging from the UKIDSS-UDS survey. We estimate that K>25.3 submillimetre galaxies represent 15+/-2 per cent of the total population brighter than S870=3.6mJy, with an expected surface density of ~450/deg^2 above S870>1mJy. As such they pose a source of contamination in surveys for both high-redshift "quiescent" galaxies and very-high-redshift Lyman-break galaxies. We show that these K-faint submillimetre galaxies are simply the tail of the broader submillimetre population, with comparable dust and stellar masses to K

KW - astro-ph.GA

U2 - 10.1093/mnras/stab283

DO - 10.1093/mnras/stab283

M3 - Article

VL - 502

SP - 3426

EP - 3435

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 3

ER -

An ALMA survey of the S2CLS UDS field: Optically invisible submillimetre galaxies

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