Journal
ASTRONOMY & ASTROPHYSICS
Volume 551, Issue -, Pages -Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201220811
Keywords
galaxies: high-redshift; galaxies: starburst; infrared: galaxies; submillimeter: galaxies; radio lines: galaxies
Categories
Funding
- INSU/CNRS (France)
- MPG (Germany)
- IGN (Spain)
- NASA through JPL
- ASI-INAF [I/009/10/0]
- CSA (Canada)
- NAOC (China)
- CEA
- CNES
- CNRS (France)
- ASI (Italy)
- MCINN (Spain)
- SNSB (Sweden)
- STFC
- UKSA (UK)
- NASA (USA)
- FWO-Pegasus Marie Curie Fellowship
- Science and Technology Facilities Council [PP/D000963/1, ST/G002533/1, ST/I001212/1] Funding Source: researchfish
- STFC [ST/G002533/1, ST/I001212/1, PP/D000963/1, ST/H001530/1] Funding Source: UKRI
Ask authors/readers for more resources
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 2(02)-1(11) or 2(11)-2(02) H2O emission lines with integrated line fluxes ranging from 1.8 to 14 Jy km s(-1). The corresponding apparent luminosities are mu L-H2O similar to 3-12 x 10(8) L-circle dot, where mu is the lensing magnification factor (3 < mu < 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 (similar to 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 mu m) > 100 mJy) discovered in the Herschel surveys. Correcting the luminosities for amplification, using existing lensing models, L-H2O is found to have a strong dependence on the infrared luminosity, varying as similar to L-IR(1.2). 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 L-IR greater than or similar to 10(13) L-circle dot tend to be very strong emitters in water vapor, that have no equivalent in the local universe.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available