Physical conditions of the gas in an ALMA [C II]-identified submillimetre galaxy at z = 4.44

M. T. Huynh; R. P. Norris; N. Seymour; K. E.K. Coppin; R. J. Ivison; Smail Ian; A. M. Swinbank; A. Karim; C. De Breuck; V. Smolčić; W. N. Brandt; S. C. Chapman; H. Dannerbauer; T. R. Greve; J. A. Hodge; K. K. Knudsen; K. M. Menten; A. Weiss; P. P. van der Werf

doi:10.1093/mnrasl/slt014

Physical conditions of the gas in an ALMA [C II]-identified submillimetre galaxy at z = 4.44

M. T. Huynh, R. P. Norris, N. Seymour, K. E.K. Coppin, R. J. Ivison, Smail Ian, A. M. Swinbank, A. Karim, C. De Breuck, V. Smolčić, W. N. Brandt, S. C. Chapman, H. Dannerbauer, T. R. Greve, J. A. Hodge, K. K. Knudsen, K. M. Menten, A. Weiss, P. P. van der Werf

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Abstract

We present 12CO(2-1) observations of the submillimetre galaxy ALESS65.1 performed with the Australia Telescope Compact Array (ATCA) at 42.3 GHz. A previous Atacama Large Millimeter Array study of submillimetre galaxies (SMGs) in the Extended Chandra Deep Field South detected [C II] 157.74 μmemission from this galaxy at a redshift of z=4.44. No 12CO(2- 1) emission was detected but we derive a firm upper limit to the cold gas mass in ALESS65.1 of Mgas >1.7 × 10¹⁰M . The estimated gas depletion time-scale is >50 Myr, which is similar to other high-redshift SMGs, and consistent with z > 4 SMGs being the likely progenitors of massive red-and-dead galaxies at z < 2. The ratio of the [CII], ¹²CO and far-infrared luminosities implies a strong far-ultraviolet field of G0 10³, as seen in Galactic star-forming regions or local ultraluminous infrared galaxies (ULIRGs). The observed L[C II]/LFIR = 2.3 × 10^-3 is high compared to local ULIRGs and, combined withL[C II]/LCO 2700, it is consiste×nt with ALESS65.1 either having an extended (several kpc) [C II] emitting region or lower than solar metallicity.

Original language	English (US)
Pages (from-to)	L88-L92
Journal	Monthly Notices of the Royal Astronomical Society: Letters
Volume	431
Issue number	1
DOIs	https://doi.org/10.1093/mnrasl/slt014
State	Published - May 1 2013

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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Huynh, M. T., Norris, R. P., Seymour, N., Coppin, K. E. K., Ivison, R. J., Ian, S., Swinbank, A. M., Karim, A., De Breuck, C., Smolčić, V., Brandt, W. N., Chapman, S. C., Dannerbauer, H., Greve, T. R., Hodge, J. A., Knudsen, K. K., Menten, K. M., Weiss, A., & van der Werf, P. P. (2013). Physical conditions of the gas in an ALMA [C II]-identified submillimetre galaxy at z = 4.44. Monthly Notices of the Royal Astronomical Society: Letters, 431(1), L88-L92. https://doi.org/10.1093/mnrasl/slt014

@article{170ceb27b90449d4b5b88fc2139635a7,

title = "Physical conditions of the gas in an ALMA [C II]-identified submillimetre galaxy at z = 4.44",

abstract = "We present 12CO(2-1) observations of the submillimetre galaxy ALESS65.1 performed with the Australia Telescope Compact Array (ATCA) at 42.3 GHz. A previous Atacama Large Millimeter Array study of submillimetre galaxies (SMGs) in the Extended Chandra Deep Field South detected [C II] 157.74 μmemission from this galaxy at a redshift of z=4.44. No 12CO(2- 1) emission was detected but we derive a firm upper limit to the cold gas mass in ALESS65.1 of Mgas >1.7 × 1010M . The estimated gas depletion time-scale is >50 Myr, which is similar to other high-redshift SMGs, and consistent with z > 4 SMGs being the likely progenitors of massive red-and-dead galaxies at z < 2. The ratio of the [CII], 12CO and far-infrared luminosities implies a strong far-ultraviolet field of G0 103, as seen in Galactic star-forming regions or local ultraluminous infrared galaxies (ULIRGs). The observed L[C II]/LFIR = 2.3 × 10-3 is high compared to local ULIRGs and, combined withL[C II]/LCO 2700, it is consiste×nt with ALESS65.1 either having an extended (several kpc) [C II] emitting region or lower than solar metallicity.",

author = "Huynh, {M. T.} and Norris, {R. P.} and N. Seymour and Coppin, {K. E.K.} and Ivison, {R. J.} and Smail Ian and Swinbank, {A. M.} and A. Karim and {De Breuck}, C. and V. Smol{\v c}i{\'c} and Brandt, {W. N.} and Chapman, {S. C.} and H. Dannerbauer and Greve, {T. R.} and Hodge, {J. A.} and Knudsen, {K. K.} and Menten, {K. M.} and A. Weiss and {van der Werf}, {P. P.}",

year = "2013",

month = may,

day = "1",

doi = "10.1093/mnrasl/slt014",

language = "English (US)",

volume = "431",

pages = "L88--L92",

journal = "Monthly Notices of the Royal Astronomical Society: Letters",

issn = "1745-3925",

publisher = "Oxford University Press",

number = "1",

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Huynh, MT, Norris, RP, Seymour, N, Coppin, KEK, Ivison, RJ, Ian, S, Swinbank, AM, Karim, A, De Breuck, C, Smolčić, V, Brandt, WN, Chapman, SC, Dannerbauer, H, Greve, TR, Hodge, JA, Knudsen, KK, Menten, KM, Weiss, A & van der Werf, PP 2013, 'Physical conditions of the gas in an ALMA [C II]-identified submillimetre galaxy at z = 4.44', Monthly Notices of the Royal Astronomical Society: Letters, vol. 431, no. 1, pp. L88-L92. https://doi.org/10.1093/mnrasl/slt014

TY - JOUR

T1 - Physical conditions of the gas in an ALMA [C II]-identified submillimetre galaxy at z = 4.44

AU - Huynh, M. T.

AU - Norris, R. P.

AU - Seymour, N.

AU - Coppin, K. E.K.

AU - Ivison, R. J.

AU - Ian, Smail

AU - Swinbank, A. M.

AU - Karim, A.

AU - De Breuck, C.

AU - Smolčić, V.

AU - Brandt, W. N.

AU - Chapman, S. C.

AU - Dannerbauer, H.

AU - Greve, T. R.

AU - Hodge, J. A.

AU - Knudsen, K. K.

AU - Menten, K. M.

AU - Weiss, A.

AU - van der Werf, P. P.

PY - 2013/5/1

Y1 - 2013/5/1

N2 - We present 12CO(2-1) observations of the submillimetre galaxy ALESS65.1 performed with the Australia Telescope Compact Array (ATCA) at 42.3 GHz. A previous Atacama Large Millimeter Array study of submillimetre galaxies (SMGs) in the Extended Chandra Deep Field South detected [C II] 157.74 μmemission from this galaxy at a redshift of z=4.44. No 12CO(2- 1) emission was detected but we derive a firm upper limit to the cold gas mass in ALESS65.1 of Mgas >1.7 × 1010M . The estimated gas depletion time-scale is >50 Myr, which is similar to other high-redshift SMGs, and consistent with z > 4 SMGs being the likely progenitors of massive red-and-dead galaxies at z < 2. The ratio of the [CII], 12CO and far-infrared luminosities implies a strong far-ultraviolet field of G0 103, as seen in Galactic star-forming regions or local ultraluminous infrared galaxies (ULIRGs). The observed L[C II]/LFIR = 2.3 × 10-3 is high compared to local ULIRGs and, combined withL[C II]/LCO 2700, it is consiste×nt with ALESS65.1 either having an extended (several kpc) [C II] emitting region or lower than solar metallicity.

AB - We present 12CO(2-1) observations of the submillimetre galaxy ALESS65.1 performed with the Australia Telescope Compact Array (ATCA) at 42.3 GHz. A previous Atacama Large Millimeter Array study of submillimetre galaxies (SMGs) in the Extended Chandra Deep Field South detected [C II] 157.74 μmemission from this galaxy at a redshift of z=4.44. No 12CO(2- 1) emission was detected but we derive a firm upper limit to the cold gas mass in ALESS65.1 of Mgas >1.7 × 1010M . The estimated gas depletion time-scale is >50 Myr, which is similar to other high-redshift SMGs, and consistent with z > 4 SMGs being the likely progenitors of massive red-and-dead galaxies at z < 2. The ratio of the [CII], 12CO and far-infrared luminosities implies a strong far-ultraviolet field of G0 103, as seen in Galactic star-forming regions or local ultraluminous infrared galaxies (ULIRGs). The observed L[C II]/LFIR = 2.3 × 10-3 is high compared to local ULIRGs and, combined withL[C II]/LCO 2700, it is consiste×nt with ALESS65.1 either having an extended (several kpc) [C II] emitting region or lower than solar metallicity.

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UR - http://www.scopus.com/inward/citedby.url?scp=84876824138&partnerID=8YFLogxK

U2 - 10.1093/mnrasl/slt014

DO - 10.1093/mnrasl/slt014

M3 - Article

AN - SCOPUS:84876824138

SN - 1745-3925

VL - 431

SP - L88-L92

JO - Monthly Notices of the Royal Astronomical Society: Letters

JF - Monthly Notices of the Royal Astronomical Society: Letters

IS - 1

ER -

Physical conditions of the gas in an ALMA [C II]-identified submillimetre galaxy at z = 4.44

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