Discovery of a multiply lensed submillimeter galaxy in early HerMES Herschel/SPIRE data
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Open access via publisher
Authors
Conley, A.
Cooray, A.
Vieira, J.
Solares, E.
Kim, S.
Aguirre, J.
Amblard, A.
Auld, R.
Baker, A.
Beelen, A.
Blain, A.
Blundell, R.
Bock, J.
Bradford, C.
Bridge, C.
Brisbin, D.
Burgarella, D.
Carpenter, J.
Chanial, P.
Chapin, E.
Christopher, N.
Clements, D.
Cox, P.
Djorgovski, S.
Dowell, C.
Eales, S.
Earle, L.
Ellsworth-Bowers, T.
Farrah, D.
Franceschini, A.
Frayer, D.
Fu, H.
Gavazzi, R.
Glenn, J.
Griffin, M.
Gurwell, M.
Halpern, M.
Ibar, E.
Ivison, R.
Jarvis, M.
Kamenetzky, J.
Krips, M.
Levenson, L.
Lupu, R.
Mahabal, A.
Maloney, P.
Maraston, C.
Marchetti, L.
Marsden, G.
Matsuhara, H.
Mortier, A.
Murphy, E.
Naylor, B.
Neri, R.
Nguyen, H.
Oliver, S.
Omont, A.
Page, M.
Papageorgiou, A.
Pearson, C.
Pérez-Fournon, I.
Pohlen, M.
Rangwala, N.
Rawlings, J.
Raymond, G.
Riechers, D.
Rodighiero, G.
Roseboom, I.
Rowan-Robinson, M.
Schulz, B.
Scott, D.
Scott, K.
Serra, P.
Seymour, Nick
Shupe, D.
Smith, A.
Symeonidis, M.
Tugwell, K.
Vaccari, M.
Valiante, E.
Valtchanov, I.
Verma, A.
Viero, M.
Vigroux, L.
Wang, L.
Wiebe, D.
Wright, G.
Xu, C.K.
Zeimann, G.
Zemcov, M.
Zmuidzinas, J.
Date
2011Type
Journal Article
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Conley, A. and Cooray, A. and Vieira, J. and Solares, E. and Kim, S. and Aguirre, J. and Amblard, A. et al. 2011. Discovery of a multiply lensed submillimeter galaxy in early HerMES Herschel/SPIRE data. Astrophysical Journal Letters. 732 (2).
Source Title
Astrophysical Journal Letters
ISSN
School
Department of Physics and Astronomy
Collection
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.
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