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Far-infrared spectroscopy of a lensed starburst : a blind redshift from Herschel

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Abstract
We report the redshift of HATLAS J132427.0+284452 (hereafter HATLAS J132427), a gravitationally lensed starburst galaxy, the first determined 'blind' by the Herschel Space Observatory. This is achieved via the detection of [C II] consistent with z = 1.68 in a far-infrared spectrum taken with the SPIRE Fourier Transform Spectrometer (FTS). We demonstrate that the [C II] redshift is secure via detections of CO J = 2 -> 1 and 3 -> 2 using the Combined Array for Research in Millimeter-wave Astronomy and the Institut de Radioastronomie Millimetrique's Plateau de Bure Interferometer. The intrinsic properties appear typical of high-redshift starbursts despite the high lensing-amplified fluxes, proving the ability of the FTS to probe this population with the aid of lensing. The blind detection of [C II] demonstrates the potential of the SPICA Far-infrared Instrument imaging spectrometer, proposed for the much more sensitive Space Infrared Telescope for Cosmology and Astrophysics mission, to determine redshifts of multiple dusty galaxies simultaneously without the benefit of lensing.
Keywords
STAR-FORMING GALAXIES, LUMINOUS SUBMILLIMETER GALAXIES, submillimetre: galaxies, radio continuum: galaxies, infrared: galaxies, galaxies: starburst, galaxies: high-redshift, radio lines: galaxies, SCIENCE DEMONSTRATION PHASE, SEQUENCE CLUSTER SURVEY, C-II LINE, INTERSTELLAR-MEDIUM, MOLECULAR GAS, ATLAS, EMISSION, DUST

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Chicago
George, RD, RJ Ivison, R Hopwood, DA Riechers, RS Bussmann, P Cox, S Dye, et al. 2013. “Far-infrared Spectroscopy of a Lensed Starburst : a Blind Redshift from Herschel.” Monthly Notices of the Royal Astronomical Society 436 (1): L99–L103.
APA
George, R., Ivison, R., Hopwood, R., Riechers, D., Bussmann, R., Cox, P., Dye, S., et al. (2013). Far-infrared spectroscopy of a lensed starburst : a blind redshift from Herschel. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 436(1), L99–L103.
Vancouver
1.
George R, Ivison R, Hopwood R, Riechers D, Bussmann R, Cox P, et al. Far-infrared spectroscopy of a lensed starburst : a blind redshift from Herschel. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 2013;436(1):L99–L103.
MLA
George, RD, RJ Ivison, R Hopwood, et al. “Far-infrared Spectroscopy of a Lensed Starburst : a Blind Redshift from Herschel.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 436.1 (2013): L99–L103. Print.
@article{4385244,
  abstract     = {We report the redshift of HATLAS J132427.0+284452 (hereafter HATLAS J132427), a gravitationally lensed starburst galaxy, the first determined 'blind' by the Herschel Space Observatory. This is achieved via the detection of [C II] consistent with z = 1.68 in a far-infrared spectrum taken with the SPIRE Fourier Transform Spectrometer (FTS). We demonstrate that the [C II] redshift is secure via detections of CO J = 2 -{\textrangle} 1 and 3 -{\textrangle} 2 using the Combined Array for Research in Millimeter-wave Astronomy and the Institut de Radioastronomie Millimetrique's Plateau de Bure Interferometer. The intrinsic properties appear typical of high-redshift starbursts despite the high lensing-amplified fluxes, proving the ability of the FTS to probe this population with the aid of lensing. The blind detection of [C II] demonstrates the potential of the SPICA Far-infrared Instrument imaging spectrometer, proposed for the much more sensitive Space Infrared Telescope for Cosmology and Astrophysics mission, to determine redshifts of multiple dusty galaxies simultaneously without the benefit of lensing.},
  author       = {George, RD and Ivison, RJ and Hopwood, R and Riechers, DA and Bussmann, RS and Cox, P and Dye, S and Krips, M and Negrello, M and Neri, R and Serjeant, S and Valtchanov, I and Baes, Maarten and Bourne, N and Clements, DL and De Zotti, G and Dunne, L and Eales, SA and Ibar, E and Maddox, S and Smith, MWL and Valiante, E and van der Werf, P},
  issn         = {0035-8711},
  journal      = {MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY},
  keyword      = {STAR-FORMING GALAXIES,LUMINOUS SUBMILLIMETER GALAXIES,submillimetre: galaxies,radio continuum: galaxies,infrared: galaxies,galaxies: starburst,galaxies: high-redshift,radio lines: galaxies,SCIENCE DEMONSTRATION PHASE,SEQUENCE CLUSTER SURVEY,C-II LINE,INTERSTELLAR-MEDIUM,MOLECULAR GAS,ATLAS,EMISSION,DUST},
  language     = {eng},
  number       = {1},
  pages        = {L99--L103},
  title        = {Far-infrared spectroscopy of a lensed starburst : a blind redshift from Herschel},
  url          = {http://dx.doi.org/10.1093/mnrasl/slt122},
  volume       = {436},
  year         = {2013},
}

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