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The AT-LESS CO(1-0) survey of submillimetre galaxies in the Extended Chandra Deep Field South: First results on cold molecular gas in galaxies at z ˜ 2

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The AT-LESS CO(1-0) survey of submillimetre galaxies in the Extended Chandra Deep Field South: First results on cold molecular gas in galaxies at z ˜ 2. / Huynh, Minh T.; Emonts, B. H. C.; Kimball, A. E. et al.
In: Monthly Notices of the Royal Astronomical Society, Vol. 467, No. 1, 11.05.2017, p. 1222-1230.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Huynh, MT, Emonts, BHC, Kimball, AE, Seymour, N, Smail, I, Swinbank, AM, Brandt, WN, Casey, CM, Chapman, SC, Dannerbauer, H, Hodge, JA, Ivison, RJ, Schinnerer, E, Thomson, AP, van der Werf, P & Wardlow, JL 2017, 'The AT-LESS CO(1-0) survey of submillimetre galaxies in the Extended Chandra Deep Field South: First results on cold molecular gas in galaxies at z ˜ 2', Monthly Notices of the Royal Astronomical Society, vol. 467, no. 1, pp. 1222-1230. https://doi.org/10.1093/mnras/stx156

APA

Huynh, M. T., Emonts, B. H. C., Kimball, A. E., Seymour, N., Smail, I., Swinbank, A. M., Brandt, W. N., Casey, C. M., Chapman, S. C., Dannerbauer, H., Hodge, J. A., Ivison, R. J., Schinnerer, E., Thomson, A. P., van der Werf, P., & Wardlow, J. L. (2017). The AT-LESS CO(1-0) survey of submillimetre galaxies in the Extended Chandra Deep Field South: First results on cold molecular gas in galaxies at z ˜ 2. Monthly Notices of the Royal Astronomical Society, 467(1), 1222-1230. https://doi.org/10.1093/mnras/stx156

Vancouver

Huynh MT, Emonts BHC, Kimball AE, Seymour N, Smail I, Swinbank AM et al. The AT-LESS CO(1-0) survey of submillimetre galaxies in the Extended Chandra Deep Field South: First results on cold molecular gas in galaxies at z ˜ 2. Monthly Notices of the Royal Astronomical Society. 2017 May 11;467(1):1222-1230. Epub 2017 Jan 22. doi: 10.1093/mnras/stx156

Author

Huynh, Minh T. ; Emonts, B. H. C. ; Kimball, A. E. et al. / The AT-LESS CO(1-0) survey of submillimetre galaxies in the Extended Chandra Deep Field South: First results on cold molecular gas in galaxies at z ˜ 2. In: Monthly Notices of the Royal Astronomical Society. 2017 ; Vol. 467, No. 1. pp. 1222-1230.

Bibtex

@article{c8dcbc62aef24d9ca8b7302809f12708,
title = "The AT-LESS CO(1-0) survey of submillimetre galaxies in the Extended Chandra Deep Field South: First results on cold molecular gas in galaxies at z ˜ 2",
abstract = "We present the first results from our ongoing Australia Telescope Compact Array survey of 12CO(1-0) in Atacama Large Millimeter Array (ALMA)-identified submillimetre galaxies (SMGs) in the Extended Chandra Deep Field South. Strong detections of 12CO(1-0) emission from two SMGs, ALESS 122.1 (z = 2.0232) and ALESS 67.1 (z = 2.1230), were obtained. We estimate gas masses of Mgas ˜ 1.3 × 1011 M⊙ and Mgas ˜ 1.0 × 1011 M⊙ for ALESS 122.1 and ALESS 67.1, respectively, adopting αCO = 1.0. Dynamical mass estimates from the kinematics of the 12CO(1-0) line yields Mdyn sin2 I = (2.1 ± 1.1) × 1011 M⊙ and (3.2 ± 0.9) × 1011 M⊙ for ALESS 122.1 and ALESS 67.1, respectively. This is consistent with the total baryonic mass estimates of these two systems. We examine star formation efficiency, using the LFIR versus L^' }_{CO(1-0)} relation for samples of local ultraluminous infrared galaxies (ULIRGs) and Luminous Infrared Galaxies (LIRGs), and more distant star-forming galaxies, with 12CO(1-0) detections. We find some evidence of a shallower slope for ULIRGs and SMGs compared to less luminous systems, but a larger sample is required for definite conclusions. We determine gas-to-dust ratios of 170 ± 30 and 140 ± 30 for ALESS 122.1 and ALESS 67.1, respectively, showing that ALESS 122.1 has an unusually large gas reservoir. By combining the 38.1 GHz continuum detection of ALESS 122.1 with 1.4 and 5.5 GHz data, we estimate that the free-free contribution to radio emission at 38.1 GHz is 34 ± 17 μJy, yielding a star formation rate (1400 ± 700 M⊙ yr-1) consistent with that from the infrared luminosity.",
keywords = "galaxies: evolution, submillimetre: galaxies, radio lines: galaxies",
author = "Huynh, {Minh T.} and Emonts, {B. H. C.} and Kimball, {A. E.} and N. Seymour and Ian Smail and Swinbank, {A. M.} and Brandt, {W. N.} and Casey, {C. M.} and Chapman, {S. C.} and H. Dannerbauer and Hodge, {J. A.} and Ivison, {R. J.} and E. Schinnerer and Thomson, {A. P.} and {van der Werf}, P. and Wardlow, {J. L.}",
year = "2017",
month = may,
day = "11",
doi = "10.1093/mnras/stx156",
language = "English",
volume = "467",
pages = "1222--1230",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "OXFORD UNIV PRESS",
number = "1",

}

RIS

TY - JOUR

T1 - The AT-LESS CO(1-0) survey of submillimetre galaxies in the Extended Chandra Deep Field South: First results on cold molecular gas in galaxies at z ˜ 2

AU - Huynh, Minh T.

AU - Emonts, B. H. C.

AU - Kimball, A. E.

AU - Seymour, N.

AU - Smail, Ian

AU - Swinbank, A. M.

AU - Brandt, W. N.

AU - Casey, C. M.

AU - Chapman, S. C.

AU - Dannerbauer, H.

AU - Hodge, J. A.

AU - Ivison, R. J.

AU - Schinnerer, E.

AU - Thomson, A. P.

AU - van der Werf, P.

AU - Wardlow, J. L.

PY - 2017/5/11

Y1 - 2017/5/11

N2 - We present the first results from our ongoing Australia Telescope Compact Array survey of 12CO(1-0) in Atacama Large Millimeter Array (ALMA)-identified submillimetre galaxies (SMGs) in the Extended Chandra Deep Field South. Strong detections of 12CO(1-0) emission from two SMGs, ALESS 122.1 (z = 2.0232) and ALESS 67.1 (z = 2.1230), were obtained. We estimate gas masses of Mgas ˜ 1.3 × 1011 M⊙ and Mgas ˜ 1.0 × 1011 M⊙ for ALESS 122.1 and ALESS 67.1, respectively, adopting αCO = 1.0. Dynamical mass estimates from the kinematics of the 12CO(1-0) line yields Mdyn sin2 I = (2.1 ± 1.1) × 1011 M⊙ and (3.2 ± 0.9) × 1011 M⊙ for ALESS 122.1 and ALESS 67.1, respectively. This is consistent with the total baryonic mass estimates of these two systems. We examine star formation efficiency, using the LFIR versus L^' }_{CO(1-0)} relation for samples of local ultraluminous infrared galaxies (ULIRGs) and Luminous Infrared Galaxies (LIRGs), and more distant star-forming galaxies, with 12CO(1-0) detections. We find some evidence of a shallower slope for ULIRGs and SMGs compared to less luminous systems, but a larger sample is required for definite conclusions. We determine gas-to-dust ratios of 170 ± 30 and 140 ± 30 for ALESS 122.1 and ALESS 67.1, respectively, showing that ALESS 122.1 has an unusually large gas reservoir. By combining the 38.1 GHz continuum detection of ALESS 122.1 with 1.4 and 5.5 GHz data, we estimate that the free-free contribution to radio emission at 38.1 GHz is 34 ± 17 μJy, yielding a star formation rate (1400 ± 700 M⊙ yr-1) consistent with that from the infrared luminosity.

AB - We present the first results from our ongoing Australia Telescope Compact Array survey of 12CO(1-0) in Atacama Large Millimeter Array (ALMA)-identified submillimetre galaxies (SMGs) in the Extended Chandra Deep Field South. Strong detections of 12CO(1-0) emission from two SMGs, ALESS 122.1 (z = 2.0232) and ALESS 67.1 (z = 2.1230), were obtained. We estimate gas masses of Mgas ˜ 1.3 × 1011 M⊙ and Mgas ˜ 1.0 × 1011 M⊙ for ALESS 122.1 and ALESS 67.1, respectively, adopting αCO = 1.0. Dynamical mass estimates from the kinematics of the 12CO(1-0) line yields Mdyn sin2 I = (2.1 ± 1.1) × 1011 M⊙ and (3.2 ± 0.9) × 1011 M⊙ for ALESS 122.1 and ALESS 67.1, respectively. This is consistent with the total baryonic mass estimates of these two systems. We examine star formation efficiency, using the LFIR versus L^' }_{CO(1-0)} relation for samples of local ultraluminous infrared galaxies (ULIRGs) and Luminous Infrared Galaxies (LIRGs), and more distant star-forming galaxies, with 12CO(1-0) detections. We find some evidence of a shallower slope for ULIRGs and SMGs compared to less luminous systems, but a larger sample is required for definite conclusions. We determine gas-to-dust ratios of 170 ± 30 and 140 ± 30 for ALESS 122.1 and ALESS 67.1, respectively, showing that ALESS 122.1 has an unusually large gas reservoir. By combining the 38.1 GHz continuum detection of ALESS 122.1 with 1.4 and 5.5 GHz data, we estimate that the free-free contribution to radio emission at 38.1 GHz is 34 ± 17 μJy, yielding a star formation rate (1400 ± 700 M⊙ yr-1) consistent with that from the infrared luminosity.

KW - galaxies: evolution

KW - submillimetre: galaxies

KW - radio lines: galaxies

U2 - 10.1093/mnras/stx156

DO - 10.1093/mnras/stx156

M3 - Journal article

VL - 467

SP - 1222

EP - 1230

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 1

ER -