Far-infrared spectroscopy of a lensed starburst: a blind redshift from Herschel
| Autor: | George, R. D., Ivison, R. J., Hopwood, R., Riechers, D. A., Bussmann, R. S., Cox, P., Dye, S., Krips, M., Negrello, M., Neri, R., Serjeant, S., Valtchanov, I., Baes, M., Bourne, N., Clements, D. L., De Zotti, G., Dunne, L., Eales, S. A., Ibar, E., Maddox, S., Smith, M. W. L., Valiante, E., van der Werf, P. |
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| Rok vydání: | 2013 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1093/mnrasl/slt122 |
| Popis: | 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. 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 SAFARI imaging spectrometer, proposed for the much more sensitive SPICA mission, to determine redshifts of multiple dusty galaxies simultaneously without the benefit of lensing. Comment: 6 pages, 5 figures, accepted for publication in MNRAS as a Letter |
| Databáze: | arXiv |
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