Herschel reveals a molecular outflow in a z = 2.3 ULIRG

George, R.D.; Ivison, R.J.; Smail, I.; Swinbank, A.M.; Hopwood, R.; Stanley, F.; Swinyard, B.M.; Valtchanov, I.; Werf, P.P. van der

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.

Citation

George, R., Ivison, R., Smail, I., Swinbank, A., Hopwood, R., Stanley, F., …Werf, P. V. D. (2014). Herschel reveals a molecular outflow in a z = 2.3 ULIRG. Monthly Notices of the Royal Astronomical Society, 442(2), 1877-1883. https://doi.org/10.1093/mnras/stu967

• Journal Article Type: Article
• Publication Date: Aug 1, 2014
• Deposit Date: Nov 17, 2014
• Publicly Available Date: Nov 24, 2014
• Journal: Monthly Notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Electronic ISSN: 1365-2966
• Publisher: Royal Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 442
• Issue: 2
• Pages: 1877-1883
• DOI: https://doi.org/10.1093/mnras/stu967
• Keywords: ISM: jets and outflows, Galaxies: high-redshift, Galaxies: ISM, Galaxies: starburst, Infrared: galaxies, Submillimetre: galaxies.
• Public URL: https://durham-repository.worktribe.com/output/1450428
• Related Public URLs: http://adsabs.harvard.edu/abs/2014MNRAS.442.1877G