Ionized and Molecular Gas Kinematics in a z = 1.4 Star-forming Galaxy

H. Übler; R. Genzel; L. J. Tacconi; N. M.Förster Schreiber; R. Neri; A. Contursi; S. Belli; E. J. Nelson; P. Lang; T. T. Shimizu; R. Davies; R. Herrera-Camus; D. Lutz; P. M. Plewa; S. H. Price; K. Schuster; A. Sternberg; K. Tadaki; E. Wisnioski; S. Wuyts

doi:10.3847/2041-8213/aaacfa

Ionized and Molecular Gas Kinematics in a z = 1.4 Star-forming Galaxy

H. Übler, R. Genzel, L. J. Tacconi, N. M.Förster Schreiber, R. Neri, A. Contursi, S. Belli, E. J. Nelson, P. Lang, T. T. Shimizu, R. Davies, R. Herrera-Camus, D. Lutz, P. M. Plewa, S. H. Price, K. Schuster, A. Sternberg, K. Tadaki, E. Wisnioski, S. Wuyts

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Abstract

We present deep observations of a z = 1.4 massive, star-forming galaxy (SFG) in molecular and ionized gas at comparable spatial resolution (CO 3-2, NOrthern Extended Millimeter Array (NOEMA); Hα, Large Binocular Telescope (LBT)). The kinematic tracers agree well, indicating that both gas phases are subject to the same gravitational potential and physical processes affecting the gas dynamics. We combine the one-dimensional velocity and velocity dispersion profiles in CO and Hα to forward-model the galaxy in a Bayesian framework, combining a thick exponential disk, a bulge, and a dark matter halo. We determine the dynamical support due to baryons and dark matter, and find a dark matter fraction within one effective radius of f_DM(<R_e) = 0.18^+0.006_-0.004. Our result strengthens the evidence for strong baryon-dominance on galactic scales of massive z ∼ 1-3 SFGs recently found based on ionized gas kinematics alone.

Original language	English
Article number	L24
Journal	Astrophysical Journal Letters
Volume	854
Issue number	2
DOIs	https://doi.org/10.3847/2041-8213/aaacfa
Publication status	Published - 20 Feb 2018

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Übler, H., Genzel, R., Tacconi, L. J., Schreiber, N. M. F., Neri, R., Contursi, A., Belli, S., Nelson, E. J., Lang, P., Shimizu, T. T., Davies, R., Herrera-Camus, R., Lutz, D., Plewa, P. M., Price, S. H., Schuster, K., Sternberg, A., Tadaki, K., Wisnioski, E., & Wuyts, S. (2018). Ionized and Molecular Gas Kinematics in a z = 1.4 Star-forming Galaxy. Astrophysical Journal Letters, 854(2), Article L24. https://doi.org/10.3847/2041-8213/aaacfa

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title = "Ionized and Molecular Gas Kinematics in a z = 1.4 Star-forming Galaxy",

abstract = "We present deep observations of a z = 1.4 massive, star-forming galaxy (SFG) in molecular and ionized gas at comparable spatial resolution (CO 3-2, NOrthern Extended Millimeter Array (NOEMA); Hα, Large Binocular Telescope (LBT)). The kinematic tracers agree well, indicating that both gas phases are subject to the same gravitational potential and physical processes affecting the gas dynamics. We combine the one-dimensional velocity and velocity dispersion profiles in CO and Hα to forward-model the galaxy in a Bayesian framework, combining a thick exponential disk, a bulge, and a dark matter halo. We determine the dynamical support due to baryons and dark matter, and find a dark matter fraction within one effective radius of fDM(<Re) = 0.18+0.006-0.004. Our result strengthens the evidence for strong baryon-dominance on galactic scales of massive z ∼ 1-3 SFGs recently found based on ionized gas kinematics alone.",

keywords = "galaxies: evolution, galaxies: high-redshift, galaxies: kinematics and dynamics",

author = "H. {\"U}bler and R. Genzel and Tacconi, {L. J.} and Schreiber, {N. M.F{\"o}rster} and R. Neri and A. Contursi and S. Belli and Nelson, {E. J.} and P. Lang and Shimizu, {T. T.} and R. Davies and R. Herrera-Camus and D. Lutz and Plewa, {P. M.} and Price, {S. H.} and K. Schuster and A. Sternberg and K. Tadaki and E. Wisnioski and S. Wuyts",

year = "2018",

month = feb,

day = "20",

doi = "10.3847/2041-8213/aaacfa",

language = "English",

volume = "854",

journal = "Astrophysical Journal Letters",

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Übler, H, Genzel, R, Tacconi, LJ, Schreiber, NMF, Neri, R, Contursi, A, Belli, S, Nelson, EJ, Lang, P, Shimizu, TT, Davies, R, Herrera-Camus, R, Lutz, D, Plewa, PM, Price, SH, Schuster, K, Sternberg, A, Tadaki, K, Wisnioski, E & Wuyts, S 2018, 'Ionized and Molecular Gas Kinematics in a z = 1.4 Star-forming Galaxy', Astrophysical Journal Letters, vol. 854, no. 2, L24. https://doi.org/10.3847/2041-8213/aaacfa

TY - JOUR

T1 - Ionized and Molecular Gas Kinematics in a z = 1.4 Star-forming Galaxy

AU - Übler, H.

AU - Genzel, R.

AU - Tacconi, L. J.

AU - Schreiber, N. M.Förster

AU - Neri, R.

AU - Contursi, A.

AU - Belli, S.

AU - Nelson, E. J.

AU - Lang, P.

AU - Shimizu, T. T.

AU - Davies, R.

AU - Herrera-Camus, R.

AU - Lutz, D.

AU - Plewa, P. M.

AU - Price, S. H.

AU - Schuster, K.

AU - Sternberg, A.

AU - Tadaki, K.

AU - Wisnioski, E.

AU - Wuyts, S.

PY - 2018/2/20

Y1 - 2018/2/20

N2 - We present deep observations of a z = 1.4 massive, star-forming galaxy (SFG) in molecular and ionized gas at comparable spatial resolution (CO 3-2, NOrthern Extended Millimeter Array (NOEMA); Hα, Large Binocular Telescope (LBT)). The kinematic tracers agree well, indicating that both gas phases are subject to the same gravitational potential and physical processes affecting the gas dynamics. We combine the one-dimensional velocity and velocity dispersion profiles in CO and Hα to forward-model the galaxy in a Bayesian framework, combining a thick exponential disk, a bulge, and a dark matter halo. We determine the dynamical support due to baryons and dark matter, and find a dark matter fraction within one effective radius of fDM(<Re) = 0.18+0.006-0.004. Our result strengthens the evidence for strong baryon-dominance on galactic scales of massive z ∼ 1-3 SFGs recently found based on ionized gas kinematics alone.

AB - We present deep observations of a z = 1.4 massive, star-forming galaxy (SFG) in molecular and ionized gas at comparable spatial resolution (CO 3-2, NOrthern Extended Millimeter Array (NOEMA); Hα, Large Binocular Telescope (LBT)). The kinematic tracers agree well, indicating that both gas phases are subject to the same gravitational potential and physical processes affecting the gas dynamics. We combine the one-dimensional velocity and velocity dispersion profiles in CO and Hα to forward-model the galaxy in a Bayesian framework, combining a thick exponential disk, a bulge, and a dark matter halo. We determine the dynamical support due to baryons and dark matter, and find a dark matter fraction within one effective radius of fDM(<Re) = 0.18+0.006-0.004. Our result strengthens the evidence for strong baryon-dominance on galactic scales of massive z ∼ 1-3 SFGs recently found based on ionized gas kinematics alone.

KW - galaxies: evolution

KW - galaxies: high-redshift

KW - galaxies: kinematics and dynamics

UR - http://www.scopus.com/inward/record.url?scp=85047772461&partnerID=8YFLogxK

U2 - 10.3847/2041-8213/aaacfa

DO - 10.3847/2041-8213/aaacfa

M3 - Article

SN - 2041-8205

VL - 854

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 2

M1 - L24

ER -

Ionized and Molecular Gas Kinematics in a z = 1.4 Star-forming Galaxy

Abstract

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