In:
The Astrophysical Journal Letters, American Astronomical Society, Vol. 732, No. 2 ( 2011-05-10), p. L35-
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 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 ∼ 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) ×
10 13 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 of Medium:
Online Resource
ISSN:
2041-8205
,
2041-8213
DOI:
10.1088/2041-8205/732/2/L35
Language:
Unknown
Publisher:
American Astronomical Society
Publication Date:
2011
detail.hit.zdb_id:
2207648-7
detail.hit.zdb_id:
2006858-X
Bookmarklink
