Herschel reveals a molecular outflow in a z = 2.3 ULIRG

Richard George; Rob Ivison; Ian Smail; Mark Swinbank; Rosalind Hopwood; Flora Stanley; Bruce Swinyard; Ivan Valtchanov; Paul van der Werf

doi:10.1093/mnras/stu967

Herschel reveals a molecular outflow in a z = 2.3 ULIRG

Astrophysics of Galaxies 2015-06-18 v2 Cosmology and Nongalactic Astrophysics

Authors: Richard George , Rob Ivison , Ian Smail , Mark Swinbank , Rosalind Hopwood , Flora Stanley , Bruce Swinyard , Ivan Valtchanov , Paul van der Werf

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

We report the results from a 19-h integration with the 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 HII regions contribute strongly to the [CII] luminosity in this z = 2.3 ULIRG. The OH feature suggests a maximum wind velocity of 700 km/s, which is lower than the expected escape velocity of the host dark matter halo, ~1000 km/s. 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 AGN-driven outflow can eject the remaining gas.

Keywords

molecular outflow ULIRG OH absorption Herschel star formation AGN feedback

Cite

@article{arxiv.1402.6320,
  title  = {Herschel reveals a molecular outflow in a z = 2.3 ULIRG},
  author = {Richard George and Rob Ivison and Ian Smail and Mark Swinbank and Rosalind Hopwood and Flora Stanley and Bruce Swinyard and Ivan Valtchanov and Paul van der Werf},
  journal= {arXiv preprint arXiv:1402.6320},
  year   = {2015}
}

Comments

7 pages, 4 figures; accepted for publication in MNRAS

Herschel reveals a molecular outflow in a z = 2.3 ULIRG

Abstract

Keywords

Cite

Comments

Related papers