Discovery of a Multiply-Lensed Submillimeter Galaxy in Early HerMES Herschel/SPIRE Data
Creators: name: Conley, A.
name: Cooray, A.
name: Vieira, J. D.
name: Solares, E. A. González
name: Kim, S.
name: Aguirre, J. E.
name: Amblard, A.
name: Auld, R.
name: Baker, A. J.
name: Beelen, A.
name: Blain, A.
name: Blundell, R.
name: Bock, J.
name: Bradford, C. M.
name: Bridge, C.
name: Brisbin, D.
name: Burgarella, D.
name: Carpenter, J. M.
name: Chanial, P.
name: Chapin, E.
name: Christopher, N.
name: Clements, D. L.
name: Cox, P.
name: Djorgovski, S. G.
name: Dowell, C. D.
name: Eales, S.
name: Earle, L.
name: Ellsworth-Bowers, T. P.
name: Farrah, D.
name: Franceschini, A.
name: Frayer, D.
name: Fu, H.
name: Gavazzi, R.
name: Glenn, J.
name: Griffin, M.
name: Gurwell, M. A.
name: Halpern, M.
name: Ibar, E.
name: Ivison, R. J.
name: Jarvis, M.
name: Kamenetzky, J.
name: Krips, M.
name: Levenson, L.
name: Lupu, R.
name: Mahabal, A.
name: Maloney, P. D.
name: Maraston, C.
name: Marchetti, L.
name: Marsden, G.
name: Matsuhara, H.
name: Mortier, A. M. J.
name: Murphy, E.
name: Naylor, B. J.
name: Neri, R.
name: Nguyen, H. T.
name: Oliver, S. J.
name: Omont, A.
name: Page, M. J.
name: Papageorgiou, A.
name: Pearson, C. P.
name: Pérez-Fournon, I.
name: Pohlen, M.
name: Rangwala, N.
name: Rawlings, J. I.
name: Raymond, G.
name: Riechers, D.
name: Rodighiero, G.
name: Roseboom, I. G.
name: Rowan-Robinson, M.
name: Schulz, B.
name: Scott, Douglas
name: Scott, K.
name: Serra, P.
name: Seymour, N.
name: Shupe, D. L.
name: Smith, A. J.
name: Symeonidis, M.
name: Tugwell, K. E.
name: Vaccari, M.
name: Valiante, E.
name: Valtchanov, I.
name: Verma, A.
name: Viero, M. P.
name: Vigroux, L.
name: Wang, L.
name: Wiebe, D.
name: Wright, G.
name: Xu, C. K.
name: Zeimann, G.
name: Zemcov, M.
name: Zmuidzinas, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We report the discovery of a bright ($f(250\mum) &gt; 400$ mJy), multiply-lensed submillimeter galaxy \obj\ in {\it Herschel}/SPIRE Science Demonstration Phase data from the HerMES project. Interferometric 880\mum\ Submillimeter Array observations resolve at least four images with a large separation of $\sim 9\arcsec$. A high-resolution adaptive optics $K_p$ 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 $μ\sim 11 \pm 1$. 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, $88 \pm 3$ K. We derive a lensing-corrected total IR luminosity of $(1.43 \pm 0.09) \times 10^{13}\, \mathrm{L}_{\odot}$, implying a star formation rate of $\sim 2500\, \mathrm{M}_{\odot}\, \mathrm{yr}^{-1}$. 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 {\it Herschel} data, and many more are expected as additional data are collected.
description: Accepted for publication in ApJL