The kiloparsec-scale star formation law at redshift 4: widespread, highly efficient star formation in the dust-obscured starburst galaxy gn20*
Jacqueline Hodge,Jacqueline Hodge,Dominik Riechers,Roberto Decarli,Fabian Walter,Chris Carilli,Emanuele Daddi,Helmut Dannerbauer +7 more
TLDR
In this article, high-resolution observations of the 880 μm (rest-frame FIR) continuum emission in the z = 4.05 submillimeter galaxy GN20 from the IRAM Plateau de Bure Interferometer (PdBI) were presented.Abstract:
We present high-resolution observations of the 880 μm (rest-frame FIR) continuum emission in the z = 4.05 submillimeter galaxy GN20 from the IRAM Plateau de Bure Interferometer (PdBI). These data resolve the obscured star formation (SF) in this unlensed galaxy on scales of 0.''3 × 0.''2 (∼2.1 × 1.3 kpc). The observations reveal a bright (16 ± 1 mJy) dusty starburst centered on the cold molecular gas reservoir and showing a bar-like extension along the major axis. The striking anti-correlation with the Hubble Space Telescope/Wide Field Camera 3 imaging suggests that the copious dust surrounding the starburst heavily obscures the rest-frame UV/optical emission. A comparison with 1.2 mm PdBI continuum data reveals no evidence for variations in the dust properties across the source within the uncertainties, consistent with extended SF, and the peak star formation rate surface density (119 ± 8 M {sub ☉} yr{sup –1} kpc{sup –2}) implies that the SF in GN20 remains sub-Eddington on scales down to 3 kpc{sup 2}. We find that the SF efficiency (SFE) is highest in the central regions of GN20, leading to a resolved SF law with a power-law slope of Σ{sub SFR} ∼ Σ{sub H{sub 2}{sup 2.1±1.0}}, and that GN20 lies above the sequence of normal star-forming disks, implying that the dispersion in the SFmore » law is not due solely to morphology or choice of conversion factor. These data extend previous evidence for a fixed SFE per free-fall time to include the star-forming medium on ∼kiloparsec scales in a galaxy 12 Gyr ago.« lessread more
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Journal ArticleDOI
Kiloparsec-scale dust disks in high-redshift luminous submillimeter galaxies.
Jacqueline Hodge,A. M. Swinbank,Julian M Simpson,Ian Smail,Fabian Walter,David M. Alexander,Frank Bertoldi,A. D. Biggs,W. N. Brandt,Scott Chapman,Chian-Chou Chen,Kristen Coppin,Peter Timothy Cox,Helmut Dannerbauer,Helmut Dannerbauer,Alastair C. Edge,Thomas R. Greve,Rob Ivison,Rob Ivison,Alexander Karim,Kirsten Kraiberg Knudsen,Karl M. Menten,Hans-Walter Rix,Eva Schinnerer,Julie Wardlow,Axel Weiss,P. van der Werf +26 more
TL;DR: In this article, high-resolution (0 ''.6) 870 mu m Atacama Large Millimeter/submillimeter Array (ALMA) imaging of 16 luminous (LIR similar to 4 x 10(12) L-circle dot) submillimeter galaxies (SMGs) from the ALESS survey of the Extended Chandra Deep Field South was presented.
Journal ArticleDOI
CO excitation of normal star forming galaxies out to z= 1.5 as regulated by the properties of their interstellar medium
Emanuele Daddi,Helmut Dannerbauer,Daizhong Liu,Daizhong Liu,Manuel Aravena,Frédéric Bournaud,Fabian Walter,Dominik A. Riechers,Georgios E. Magdis,Mark Sargent,Matthieu Béthermin,Chris Carilli,Anna Cibinel,Mark Dickinson,David Elbaz,Yu Gao,Raphael Gobat,Raphael Gobat,Jacqueline Hodge,Melanie Krips +19 more
TL;DR: In this article, the authors investigated the CO excitation of normal (near-IR selected BzK) disk galaxies at z = 1.5 using IRAM Plateau de Bure observations of the CO[2-1], CO[3-2], and CO[5-4] transitions for four galaxies, including VLA observations of CO[1-0] for three of them, with the aim of constraining the average state of H2 gas.
Journal ArticleDOI
CO excitation of normal star forming galaxies out to $z=1.5$ as regulated by the properties of their interstellar medium
Emanuele Daddi,Helmut Dannerbauer,Daizhong Liu,Daizhong Liu,Manuel Aravena,Frédéric Bournaud,Fabian Walter,Dominik A. Riechers,Georgios E. Magdis,Mark Sargent,Matthieu Béthermin,Chris Carilli,Anna Cibinel,Mark Dickinson,David Elbaz,Yu Gao,Raphael Gobat,Raphael Gobat,Jacqueline Hodge,Melanie Krips +19 more
TL;DR: In this paper, the authors investigated the CO excitation of normal star forming disk galaxies at z = 1.5 using IRAM PdBI observations of the CO[2-1], CO[3-2] and CO[5-4] transitions for 4 galaxies, including VLA observations of CO[1-0] for 3 of them, with the aim of constraining the average state of H2 gas.
Journal ArticleDOI
A survey of the cold molecular gas in gravitationally lensed star-forming galaxies at z > 2
Manuel Aravena,J. S. Spilker,Matthieu Béthermin,Matt Bothwell,Scott Chapman,C. De Breuck,R. M. Furstenau,Jorge González-López,Thomas R. Greve,Katrina C. Litke,Jingzhe Ma,M. A. Malkan,Daniel P. Marrone,Eric J. Murphy,A. A. Stark,M. Strandet,Joaquin Vieira,Axel Weiss,Niraj Welikala,Graeme F Wong,Graeme F Wong,Jordan D. Collier,Jordan D. Collier +22 more
TL;DR: In this article, a survey of CO J = 1 − 0 and J = 2 − 1 line emission towards strongly lensed high-redshift dusty star-forming galaxies (DSFGs) previously discovered with the South Pole Telescope (SPT) was conducted.
Journal ArticleDOI
An Extreme Protocluster of Luminous Dusty Starbursts in the Early Universe
Ivan Oteo,Ivan Oteo,Rob Ivison,Rob Ivison,Loretta Dunne,Loretta Dunne,A. Manilla-Robles,A. Manilla-Robles,Steve Maddox,Steve Maddox,A. J. R. Lewis,G. de Zotti,Malcolm N. Bremer,David L. Clements,Asantha Cooray,Helmut Dannerbauer,Helmut Dannerbauer,Stephen Anthony Eales,J. Greenslade,A. Omont,A. Omont,I. Perez-Fournon,I. Perez-Fournon,Dominik Riechers,Douglas Scott,P. van der Werf,Axel Weiss,Z-Y. Zhang,Z-Y. Zhang +28 more
TL;DR: The Distant Red Core (DRC) as discussed by the authors is an extreme protocluster of galaxies in the early universe whose core is formed by at least 10 dusty star-forming galaxies (DSFGs), spectroscopically confirmed to lie at 4.002$ using ALMA and ATCA.
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