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

被引：48

作者：

Uebler, H. ^{[1
]}

Genzel, R. ^{[1
,2
]}

Tacconi, L. J. ^{[1
]}

Schreiber, N. M. Foerster ^{[1
]}

Neri, R. ^{[3
]}

Contursi, A. ^{[1
]}

Belli, S. ^{[1
]}

Nelson, E. J. ^{[1
]}

Lang, P. ^{[4
]}

Shimizu, T. T. ^{[1
]}

Davies, R. ^{[1
]}

Herrera-Camus, R. ^{[1
]}

Lutz, D. ^{[1
]}

Plewa, P. M. ^{[1
]}

Price, S. H. ^{[1
]}

Schuster, K. ^{[3
]}

Sternberg, A. ^{[5
,6
]}

Tadaki, K. ^{[7
]}

Wisnioski, E. ^{[8
]}

Wuyts, S. ^{[9
]}

机构：

[1] Max Planck Inst Extraterr Phys, Giessenbachstr 1, D-85748 Garching, Germany

[2] Univ Calif Berkeley, Dept Phys & Astron, Berkeley, CA 94720 USA

[3] Inst Radioastron Millimetr, 300 Rue Piscine, F-38406 St Martin Dheres, France

[4] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[5] Tel Aviv Univ, Raymond & Beverly Sackler Sch Phys & Astron, IL-69978 Ramat Aviv, Israel

[6] Flatiron Inst, Ctr Computat Astrophys, 162 Fifth Ave, New York, NY 10010 USA

[7] Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[8] Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia

[9] Univ Bath, Dept Phys, Bath BA2 7AY, Avon, England

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2018年 / 854卷 / 02期

关键词：

galaxies: evolution; galaxies: high-redshift; galaxies: kinematics and dynamics; DARK-MATTER HALOES; ROTATION CURVES; DENSITY PROFILES; MODELS; IMPACT; DISKS;

D O I：

10.3847/2041-8213/aaacfa

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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); H alpha, 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 H alpha 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(-0.04)(+0.06). result strengthens the evidence for strong baryon-dominance on galactic scales of massive z similar to 1-3 SFGs recently found based on ionized gas kinematics alone.

引用

页数：7

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