Conley, A;
Cooray, A;
Vieira, JD;
Solares, EAG;
Kim, S;
Aguirre, JE;
Amblard, A;
... Zmuidzinas, J; + view all
(2011)
Discovery of a Multiply Lensed Submillimeter Galaxy in Early HerMES Herschel/SPIRE* Data.
The Astrophysical Journal Letters
, 732
(2)
, Article L35. 10.1088/2041-8205/732/2/L35.
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Abstract
We report the discovery of a bright (f(250 μm)>400 mJy), multiply lensed submillimeter galaxy HERMES J105751.1+573027 in Herschel/SPIRE Science Demonstration Phase data from the HerMES project. Interferometric 880 μm Submillimeter Array observations resolve at least four images with a large separation of ~9''. A high-resolution adaptive optics Kp image with Keck/NIRC2 clearly shows strong lensing arcs. Follow-up spectroscopy gives a redshift of z = 2.9575, and the lensing model gives a total magnification of μ ~ 11 ± 1. The large image separation allows us to study the multi-wavelength spectral energy distribution (SED) of the lensed source unobscured by the central lensing mass. The far-IR/millimeter-wave SED is well described by a modified blackbody fit with an unusually warm dust temperature, 88 ± 3 K. We derive a lensing-corrected total IR luminosity of (1.43 ± 0.09) × 1013 L ☉, implying a star formation rate of ~2500 M ☉ yr–1. However, models primarily developed from brighter galaxies selected at longer wavelengths are a poor fit to the full optical-to-millimeter SED. A number of other strongly lensed systems have already been discovered in early Herschel data, and many more are expected as additional data are collected.
| Type: | Article |
|---|---|
| Title: | Discovery of a Multiply Lensed Submillimeter Galaxy in Early HerMES Herschel/SPIRE* Data |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/2041-8205/732/2/L35 |
| Publisher version: | http://dx.doi.org/10.1088/2041-8205/732/2/L35 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, galaxies: high-redshift, galaxies: starburst, gravitational lensing: strong, submillimeter: galaxies, SPECTRAL ENERGY-DISTRIBUTIONS, PHOTOMETRIC REDSHIFTS, STAR-FORMATION, NUMBER COUNTS, DUST, ULTRAVIOLET, POPULATION, STARBURSTS, CATALOG, MODELS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10052528 |
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