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Resolved dust emission in a quasar at z = 3.65

Clements, D. L. and Petitpas, G. and Farrah, D. and Hatziminaoglou, E. and Babbedge, T. and Rowan-Robinson, M. and Pérez-Fournon, I. and Hernán-Caballero, Antonio and Castro-Rodríguez, Nieves and Lonsdale, C. and Surace, J. and Franceschini, A. and Wilkes, B. J. and Smith, H. (2009) Resolved dust emission in a quasar at z = 3.65. Astrophysical Journal, 698 (2). L188-L191. ISSN 0004-637X. http://resolver.caltech.edu/CaltechAUTHORS:20090807-153003396

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Abstract

We present submillimeter observations of the z= 3.653 quasar SDSS 160705+533558 together with data in the optical and infrared. The object is unusually bright in the far-IR and submillimeter with an IR luminosity of ~10^14 L_☉ . We ascribe this luminosity to a combination of active galactic nucleus (AGN) and starburst emission, with the starburst forming stars at a rate of a few thousand solar masses per year. Submillimeter Array imaging observations with a resolution ~1'' show that the submillimeter (850 μm) emission is extended on scales of 10- 35 kpc and is offset from the optical position by ~10 kpc. This morphology is dissimilar to that found in submillimeter galaxies, which are generally unresolved or marginally resolved on arcsecond scales, or submillimeter-luminous AGNs where the AGN lies at the peak of the submillimeter or molecular emission. The simplest explanation is that the object is in the early stages of a merger between a gas-rich galaxy, which hosts the starburst, and a gas-poor AGN-host galaxy, which is responsible for the quasar emission. It is also possible that jet-induced star formation might contribute to the unusual morphology.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/0004-637X/698/2/L188DOIArticle
http://www.iop.org/EJ/abstract/1538-4357/698/2/L188/PublisherArticle
ORCID:
AuthorORCID
Clements, D. L.0000-0002-9548-5033
Farrah, D.0000-0003-1748-2010
Surace, J.0000-0001-7291-0087
Additional Information:© 2009 American Astronomical Society. Print publication: Issue 2 (2009 June 20); received 2009 March 10; accepted for publication 2009 May 11; published 2009 June 5. This work was funded in part by PPARC/STFC and NASA. The Submillimeter Array is a joint project between the Smithsonian Astrophysical Observatory and the Academia Sinica Institute of Astronomy and Astrophysics and is funded by the Smithsonian Institution and the Academia Sinica. The James Clerk Maxwell Telescope is operated by The Joint Astronomy Centre on behalf of the Science and Technology Facilities Council of the United Kingdom, the Netherlands Organisation for Scientific Research, and the National Research Council of Canada. Data were taken as part of JCMT project M05AU24. The authors thank Joe Silk, George Bendo, and Pierre Chanial for useful discussions and the anonymous referee whose comments have significantly improved the paper.
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
Particle Physics and Astronomy Research Council (PPARC)UNSPECIFIED
NASAUNSPECIFIED
Smithsonian Astrophysical ObservatoryUNSPECIFIED
Academia SinicaUNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)UNSPECIFIED
National Research Council of CanadaUNSPECIFIED
Subject Keywords:galaxies: high-redshift; galaxies: interactions; galaxies: starburst; quasars: individual (SDSS 160705+533558); submillimeter
Issue or Number:2
Record Number:CaltechAUTHORS:20090807-153003396
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20090807-153003396
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14877
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:08 Aug 2009 03:25
Last Modified:24 Oct 2017 23:01

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