H2O emission in high-z ultra-luminous infrared galaxies

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dc.contributor.authorOmont, A.
dc.contributor.authorYang, Chentao
dc.contributor.authorCox, P.
dc.contributor.authorJarvis, Matt
dc.date.accessioned2018-02-16T08:03:09Z
dc.date.available2018-02-16T08:03:09Z
dc.date.issued2013
dc.description.abstractUsing the IRAM Plateau de Bure interferometer (PdBI), we report the detection of water vapor in six new lensed ultraluminous starburst galaxies at high redshift, discovered in the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS). The sources are detected either in the 202–111 or 211–202 H2O emission lines with integrated line fluxes ranging from 1.8 to 14 Jy km s−1. The corresponding apparent luminosities are μLH2O _ 3 − 12 x 108 L⊙, where μ is the lensing magnification factor (3 < μ < 12). These results confirm that H2O lines are among the strongest molecular lines in high-z ultra-luminous starburst galaxies, with intensities almost comparable to those of the high-J CO lines, and similar profiles and line widths (_200-900 km s−1). With the current sensitivity of the PdBI, the water lines can therefore easily be detected in high-z lensed galaxies (with F(500μm)>100mJy) discovered in the Herschel surveys. Correcting the luminosities for amplification, using existing lensing models, LH2O is found to have a strong dependence on the infrared luminosity, varying as _L1.2 IR . This relation, which needs to be confirmed with better statistics, may indicate a role of radiative (infrared) excitation of the H2O lines, and implies that high-z galaxies with LIR &1013 L⊙ tend to be very strong emitters in water vapor, that have no equivalent in the local universe.en_US
dc.description.accreditationWeb of Science
dc.identifier.citationOmont, A. et al. (2013). H2O emission in high-z ultra-luminous infrared galaxies. Astronomy & Astrophysics, 530: A115en_US
dc.identifier.issn0004-6361
dc.identifier.urihttp://dx.doi.org/10.1051/0004-6361/201220811
dc.identifier.urihttp://hdl.handle.net/10566/3502
dc.language.isoenen_US
dc.privacy.showsubmitterFALSE
dc.publisheredp sciencesen_US
dc.rightsThis is the pre-print version (From arXiv:1301.6618) of the article published online at: http://dx.doi.org/10.1051/0004-6361/201220811
dc.status.ispeerreviewedTRUE
dc.subjectGalaxiesen_US
dc.subjectHigh-redshiften_US
dc.subjectStarbursten_US
dc.subjectInfrareden_US
dc.subjectSubmillimeteren_US
dc.subjectRadio linesen_US
dc.titleH2O emission in high-z ultra-luminous infrared galaxiesen_US
dc.typeArticleen_US

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