Herschel reveals a molecular outflow in a z=2.3 ULIRG

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

Research output: Contribution to journalArticlepeer-review

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, a parts per thousand 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.

Original languageEnglish
Pages (from-to)1877-1883
Number of pages7
JournalMonthly Notices of the Royal Astronomical Society
Volume442
Issue number2
DOIs
Publication statusPublished - 1 Aug 2014

Keywords

  • ISM: jets and outflows
  • galaxies: high-redshift
  • galaxies: ISM
  • galaxies: starburst
  • infrared: galaxies
  • submillimetre: galaxies
  • STAR-FORMING GALAXIES
  • ULTRALUMINOUS INFRARED GALAXIES
  • HIGH-REDSHIFT GALAXIES
  • SUBMILLIMETER GALAXIES
  • INTERSTELLAR-MEDIUM
  • GALACTIC WINDS
  • QUASAR FEEDBACK
  • STELLAR MASS
  • C-II
  • LINE

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