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Herschel reveals a molecular outflow in a z = 2.3 ULIRG.

George, R.D. and Ivison, R.J. and Smail, I. and Swinbank, A.M. and Hopwood, R. and Stanley, F. and Swinyard, B.M. and Valtchanov, I. and Werf, P.P. van der (2014) 'Herschel reveals a molecular outflow in a z = 2.3 ULIRG.', Monthly notices of the Royal Astronomical Society., 442 (2). pp. 1877-1883.

Abstract

We report the results from a 19-h integration with the Spectral and Photometric Imaging REceiver (SPIRE) Fourier Transform Spectrometer aboard the Herschel Space Observatory which has revealed the presence of a molecular outflow from the Cosmic Eyelash (SMM J2135−0102) via the detection of blueshifted OH absorption. Detections of several fine-structure emission lines indicate low-excitation H ii regions contribute strongly to the [C ii] luminosity in this z = 2.3 ultra-luminous infrared galaxy (ULIRG). The OH feature suggests a maximum wind velocity of 700 km s− 1, which is lower than the expected escape velocity of the host dark matter halo, ≈ 1000 km s− 1. A large fraction of the available molecular gas could thus be converted into stars via a burst protracted by the resulting gas fountain, until an active galactic nucleus (AGN)-driven outflow can eject the remaining gas.

Item Type:Article
Keywords:ISM: jets and outflows, Galaxies: high-redshift, Galaxies: ISM, Galaxies: starburst, Infrared: galaxies, Submillimetre: galaxies.
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Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1093/mnras/stu967
Publisher statement:This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Date accepted:No date available
Date deposited:24 November 2014
Date of first online publication:August 2014
Date first made open access:No date available

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