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    Rights statement: This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated version J Molina, Edo Ibar, I Smail, A M Swinbank, E Villard, A Escala, D Sobral, T M Hughes, The kiloparsec-scale gas kinematics in two star-forming galaxies at z ∼ 1.47 seen with ALMA and VLT-SINFONI, Monthly Notices of the Royal Astronomical Society, Volume 487, Issue 4, August 2019, Pages 4856–4869 is available online at: https://academic.oup.com/mnras/article/487/4/4856/5518359

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The kiloparsec-scale gas kinematics in two star-forming galaxies at z~1.47 seen with ALMA and VLT-SINFONI

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The kiloparsec-scale gas kinematics in two star-forming galaxies at z~1.47 seen with ALMA and VLT-SINFONI. / Molina, Juan; Ibar, Edo; Smail, Ian; Swinbank, A. M.; Villard, E.; Escala, A.; Sobral, David; Hughes, T. M.

In: Monthly Notices of the Royal Astronomical Society, Vol. 487, No. 4, 01.08.2019, p. 4856–4869.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Molina, J, Ibar, E, Smail, I, Swinbank, AM, Villard, E, Escala, A, Sobral, D & Hughes, TM 2019, 'The kiloparsec-scale gas kinematics in two star-forming galaxies at z~1.47 seen with ALMA and VLT-SINFONI', Monthly Notices of the Royal Astronomical Society, vol. 487, no. 4, pp. 4856–4869. https://doi.org/10.1093/mnras/stz1643

APA

Molina, J., Ibar, E., Smail, I., Swinbank, A. M., Villard, E., Escala, A., Sobral, D., & Hughes, T. M. (2019). The kiloparsec-scale gas kinematics in two star-forming galaxies at z~1.47 seen with ALMA and VLT-SINFONI. Monthly Notices of the Royal Astronomical Society, 487(4), 4856–4869. https://doi.org/10.1093/mnras/stz1643

Vancouver

Molina J, Ibar E, Smail I, Swinbank AM, Villard E, Escala A et al. The kiloparsec-scale gas kinematics in two star-forming galaxies at z~1.47 seen with ALMA and VLT-SINFONI. Monthly Notices of the Royal Astronomical Society. 2019 Aug 1;487(4):4856–4869. https://doi.org/10.1093/mnras/stz1643

Author

Molina, Juan ; Ibar, Edo ; Smail, Ian ; Swinbank, A. M. ; Villard, E. ; Escala, A. ; Sobral, David ; Hughes, T. M. / The kiloparsec-scale gas kinematics in two star-forming galaxies at z~1.47 seen with ALMA and VLT-SINFONI. In: Monthly Notices of the Royal Astronomical Society. 2019 ; Vol. 487, No. 4. pp. 4856–4869.

Bibtex

@article{2a549e88e4c1467398ba87b46f686ddd,
title = "The kiloparsec-scale gas kinematics in two star-forming galaxies at z~1.47 seen with ALMA and VLT-SINFONI",
abstract = "We present Atacama Large Millimeter/submillimeter Array (ALMA) CO(J = 2 − 1) observations of two main-sequence star-forming galaxies at z ∼ 1.47 taken from the High-Z Emission Line Survey (HiZELS). These two systems have been previously reported to be molecular gas rich fH2 ≡ MH2 /(MH2 + M⋆) ∼ 0.8. We carried out a follow-up study to resolve, at ∼kpc-scales, the CO emission. These new observations are combined with our earlier ALMA observations (sensitive to diffuse CO emission) and compared with our previous Hα-based study at matched spatial resolution. One target is marginally resolved in CO(2-1), showing complex dynamics with respect to the ionised gas traced by Hα. While the other source is spatially resolved, enabling a detailed exploration of its internal dynamical properties. In this system, both gaseous phases show similar spatial extension, rotation velocities and velocity dispersions (Vrot ∼ σv ∼ 100 km s−1) suggesting a rotational velocity to velocity dispersion ratioconsistent with unity. By comparing the ionized and molecular gas tracers through the use of a two-dimensional kinematic model, we estimate a median depletion time τdep = 2.3 ± 1.2 Gyr for the galaxy as a whole. This value is in agreement with the average τdep value observed in local star-forming galaxies at similar spatial scales. Using a thick-disk dynamical modelling, we derive a dynamical mass M = (1.59 ± 0.19) × 10^11 M within ≈ 6 kpc. This suggests a dark matter fraction fDM ≡ MDM/Mdyn of 0.59 ± 0.10, in agreement with the average fDM value derived from stacked rotation curve analysis of galaxies at similar redshift range.",
author = "Juan Molina and Edo Ibar and Ian Smail and Swinbank, {A. M.} and E. Villard and A. Escala and David Sobral and Hughes, {T. M.}",
note = "This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated version J Molina, Edo Ibar, I Smail, A M Swinbank, E Villard, A Escala, D Sobral, T M Hughes, The kiloparsec-scale gas kinematics in two star-forming galaxies at z ∼ 1.47 seen with ALMA and VLT-SINFONI, Monthly Notices of the Royal Astronomical Society, Volume 487, Issue 4, August 2019, Pages 4856–4869 is available online at: https://academic.oup.com/mnras/article/487/4/4856/5518359",
year = "2019",
month = aug,
day = "1",
doi = "10.1093/mnras/stz1643",
language = "English",
volume = "487",
pages = "4856–4869",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "OXFORD UNIV PRESS",
number = "4",

}

RIS

TY - JOUR

T1 - The kiloparsec-scale gas kinematics in two star-forming galaxies at z~1.47 seen with ALMA and VLT-SINFONI

AU - Molina, Juan

AU - Ibar, Edo

AU - Smail, Ian

AU - Swinbank, A. M.

AU - Villard, E.

AU - Escala, A.

AU - Sobral, David

AU - Hughes, T. M.

N1 - This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated version J Molina, Edo Ibar, I Smail, A M Swinbank, E Villard, A Escala, D Sobral, T M Hughes, The kiloparsec-scale gas kinematics in two star-forming galaxies at z ∼ 1.47 seen with ALMA and VLT-SINFONI, Monthly Notices of the Royal Astronomical Society, Volume 487, Issue 4, August 2019, Pages 4856–4869 is available online at: https://academic.oup.com/mnras/article/487/4/4856/5518359

PY - 2019/8/1

Y1 - 2019/8/1

N2 - We present Atacama Large Millimeter/submillimeter Array (ALMA) CO(J = 2 − 1) observations of two main-sequence star-forming galaxies at z ∼ 1.47 taken from the High-Z Emission Line Survey (HiZELS). These two systems have been previously reported to be molecular gas rich fH2 ≡ MH2 /(MH2 + M⋆) ∼ 0.8. We carried out a follow-up study to resolve, at ∼kpc-scales, the CO emission. These new observations are combined with our earlier ALMA observations (sensitive to diffuse CO emission) and compared with our previous Hα-based study at matched spatial resolution. One target is marginally resolved in CO(2-1), showing complex dynamics with respect to the ionised gas traced by Hα. While the other source is spatially resolved, enabling a detailed exploration of its internal dynamical properties. In this system, both gaseous phases show similar spatial extension, rotation velocities and velocity dispersions (Vrot ∼ σv ∼ 100 km s−1) suggesting a rotational velocity to velocity dispersion ratioconsistent with unity. By comparing the ionized and molecular gas tracers through the use of a two-dimensional kinematic model, we estimate a median depletion time τdep = 2.3 ± 1.2 Gyr for the galaxy as a whole. This value is in agreement with the average τdep value observed in local star-forming galaxies at similar spatial scales. Using a thick-disk dynamical modelling, we derive a dynamical mass M = (1.59 ± 0.19) × 10^11 M within ≈ 6 kpc. This suggests a dark matter fraction fDM ≡ MDM/Mdyn of 0.59 ± 0.10, in agreement with the average fDM value derived from stacked rotation curve analysis of galaxies at similar redshift range.

AB - We present Atacama Large Millimeter/submillimeter Array (ALMA) CO(J = 2 − 1) observations of two main-sequence star-forming galaxies at z ∼ 1.47 taken from the High-Z Emission Line Survey (HiZELS). These two systems have been previously reported to be molecular gas rich fH2 ≡ MH2 /(MH2 + M⋆) ∼ 0.8. We carried out a follow-up study to resolve, at ∼kpc-scales, the CO emission. These new observations are combined with our earlier ALMA observations (sensitive to diffuse CO emission) and compared with our previous Hα-based study at matched spatial resolution. One target is marginally resolved in CO(2-1), showing complex dynamics with respect to the ionised gas traced by Hα. While the other source is spatially resolved, enabling a detailed exploration of its internal dynamical properties. In this system, both gaseous phases show similar spatial extension, rotation velocities and velocity dispersions (Vrot ∼ σv ∼ 100 km s−1) suggesting a rotational velocity to velocity dispersion ratioconsistent with unity. By comparing the ionized and molecular gas tracers through the use of a two-dimensional kinematic model, we estimate a median depletion time τdep = 2.3 ± 1.2 Gyr for the galaxy as a whole. This value is in agreement with the average τdep value observed in local star-forming galaxies at similar spatial scales. Using a thick-disk dynamical modelling, we derive a dynamical mass M = (1.59 ± 0.19) × 10^11 M within ≈ 6 kpc. This suggests a dark matter fraction fDM ≡ MDM/Mdyn of 0.59 ± 0.10, in agreement with the average fDM value derived from stacked rotation curve analysis of galaxies at similar redshift range.

U2 - 10.1093/mnras/stz1643

DO - 10.1093/mnras/stz1643

M3 - Journal article

VL - 487

SP - 4856

EP - 4869

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 4

ER -