A kiloparsec-scale hyper-starburst in a quasar host less than 1 gigayear after the big bang

ABSTRACT The host galaxy of the quasar SDSS J114816.64+525150.3 (at redshift _z_ = 6.42, when the Universe was less than a billion years old) has an infrared luminosity of 2.2 × 1013 times

that of the Sun1,2, presumably significantly powered by a massive burst of star formation3,4,5,6. In local examples of extremely luminous galaxies, such as Arp 220, the burst of star

formation is concentrated in a relatively small central region of <100 pc radius7,8. It is not known on which scales stars are forming in active galaxies in the early Universe, at a time

when they are probably undergoing their initial burst of star formation. We do know that at some early time, structures comparable to the spheroidal bulge of the Milky Way must have formed.

Here we report a spatially resolved image of [C ii] emission of the host galaxy of J114816.64+525150.3 that demonstrates that its star-forming gas is distributed over a radius of about 750 

pc around the centre. The surface density of the star formation rate averaged over this region is ∼1,000 year-1 kpc-2. This surface density is comparable to the peak in Arp 220, although

about two orders of magnitude larger in area. This vigorous star-forming event is likely to give rise to a massive spheroidal component in this system. Access through your institution Buy or

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A DUSTY COMPACT OBJECT BRIDGING GALAXIES AND QUASARS AT COSMIC DAWN Article 13 April 2022 A MATURE QUASAR AT COSMIC DAWN REVEALED BY JWST REST-FRAME INFRARED SPECTROSCOPY Article 17 June

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with the IRAM Plateau de Bure Interferometer. IRAM is supported by MPG (Germany), INSU/CNRS (France) and IGN (Spain). D.R. acknowledges support from NASA through a Hubble Fellowship awarded

by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA. C.C. acknowledges support from the Max-Planck

Gesellschaft and the Alexander von Humboldt Stiftung through the Max-Planck-Forschungspreis 2005. F.W. and D.R. appreciate the hospitality of the Aspen Center for Physics, where this

manuscript was written. AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany , Fabian Walter & Dominik Riechers *

California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA , Dominik Riechers * Institut de Radio Astronomie Millimétrique, 300 rue de la Piscine,

F-38406 St-Martin-d’Hères, France , Pierre Cox & Roberto Neri * National Radio Astronomy Observatory, PO Box O, Socorro, New Mexico 87801, USA , Chris Carilli * Argelander Institut für

Astronomie, Auf dem Hügel 71, D-53121 Bonn, Germany , Frank Bertoldi * Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany , Axel Weiss * L’Istituto Nazionale di

Astrofisica, Osservatorio Astronomico di Roma, I-00040 Monte Porzio Catone, Roma, Italy , Roberto Maiolino Authors * Fabian Walter View author publications You can also search for this

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AUTHOR Correspondence to Fabian Walter. POWERPOINT SLIDES POWERPOINT SLIDE FOR FIG. 1 POWERPOINT SLIDE FOR FIG. 2 RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE

THIS ARTICLE Walter, F., Riechers, D., Cox, P. _et al._ A kiloparsec-scale hyper-starburst in a quasar host less than 1 gigayear after the Big Bang. _Nature_ 457, 699–701 (2009).

https://doi.org/10.1038/nature07681 Download citation * Received: 25 July 2008 * Accepted: 18 November 2008 * Issue Date: 05 February 2009 * DOI: https://doi.org/10.1038/nature07681 SHARE

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