Journal article
H2O emission in high-z ultra-luminous infrared galaxies
Astronomy and astrophysics (Berlin), Vol.551, A115
03/2013
DOI: 10.1051/0004-6361/201220811
Abstract
Using the IRAM Plateau de Bure interferometer (PdBI), we report the detection of water vapor in six new lensed ultra-luminous 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 × 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(500 μm) > 100 mJy) 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 ~LIR1.2. 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.
Details
- Title: Subtitle
- H2O emission in high-z ultra-luminous infrared galaxies
- Creators
- A Omont - Institut d'Astrophysique de ParisC Yang - Institut d'Astrophysique de ParisP Cox - Institut de Radioastronomie Millimétrique (IRAM), 300 rue de la Piscine, 38406 Saint-Martin d’Hères, FranceR Neri - Institut de Radioastronomie Millimétrique (IRAM), 300 rue de la Piscine, 38406 Saint-Martin d’Hères, FranceA Beelen - Centre National pour la Recherche Scientifique et Technique (CNRST)R. S Bussmann - Harvard UniversityR Gavazzi - Institut d'Astrophysique de ParisP van der Werf - Leiden UniversityD Riechers - Cornell UniversityD Downes - Institut de Radioastronomie Millimétrique (IRAM), 300 rue de la Piscine, 38406 Saint-Martin d’Hères, FranceM Krips - Institut de Radioastronomie Millimétrique (IRAM), 300 rue de la Piscine, 38406 Saint-Martin d’Hères, FranceS Dye - University of NottinghamR Ivison - University of EdinburghJ. D Vieira - California Institute of TechnologyA Weiß - Max Planck Institute for Radio AstronomyJ. E Aguirre - University of PennsylvaniaM Baes - Ghent UniversityA. J Baker - Rutgers, The State University of New JerseyF Bertoldi - University of BonnA Cooray - University of California, IrvineH Dannerbauer - University of ViennaG De Zotti - Osservatorio Astronomico di PadovaS. A Eales - Cardiff UniversityH Fu - University of California, IrvineY Gao - Purple Mountain ObservatoryM Guélin - Institut de Radioastronomie Millimétrique (IRAM), 300 rue de la Piscine, 38406 Saint-Martin d’Hères, FranceA. I Harris - University of Maryland, College ParkM Jarvis - University of OxfordM Lehnert - Université Paris DiderotL Leeuw - University of South AfricaR Lupu - University of PennsylvaniaK Menten - Max Planck SocietyM. J Michałowski - University of EdinburghM Negrello - Scuola Internazionale Superiore di Studi AvanzatiS Serjeant - The Open UniversityP Temi - Ames Research CenterR Auld - Cardiff UniversityA Dariush - Cardiff UniversityL Dunne - University of NottinghamJ Fritz - Ghent UniversityR Hopwood - Imperial College LondonC Hoyos - University of NottinghamE Ibar - Pontificia Universidad Católica de ChileS Maddox - University of CanterburyM. W. L Smith - Cardiff UniversityE Valiante - Cardiff UniversityJ Bock - California Institute of TechnologyC. M Bradford - California Institute of TechnologyJ Glenn - University of Colorado BoulderK. S Scott - University of Pennsylvania
- Resource Type
- Journal article
- Publication Details
- Astronomy and astrophysics (Berlin), Vol.551, A115
- DOI
- 10.1051/0004-6361/201220811
- ISSN
- 0004-6361
- eISSN
- 1432-0746
- Publisher
- EDP Sciences
- Number of pages
- 12
- Language
- English
- Date published
- 03/2013
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199774202771
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