Bibcode
Díaz-Sánchez, A.; Iglesias-Groth, S.; Rebolo, R.; Dannerbauer, H.
Bibliographical reference
The Astrophysical Journal Letters, Volume 843, Issue 2, article id. L22, 5 pp. (2017).
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7
2017
Citations
13
Refereed citations
12
Description
We report an ultrabright lensed submillimeter galaxy (SMG) at z =
2.0439, WISE J132934.18+224327.3, identified as a result of a full-sky
cross-correlation of the AllWISE and Planck compact source catalogs
aimed to search for bright analogs of the SMG SMM J2135, the Cosmic
Eyelash. Inspection of archival SCUBA-2 observations of the candidates
revealed a source with fluxes ({S}850μ {{m}}=130 mJy)
consistent with the Planck measurements. The centroid of the SCUBA-2
source coincides within 1 arcsec with the position of the AllWISE mid-IR
source, and, remarkably, with an arc-shaped lensed galaxy in HST images
at visible wavelengths. Low-resolution rest-frame UV-optical
spectroscopy of this lensed galaxy obtained with 10.4 m GTC reveals the
typical absorption lines of a starburst galaxy. Gemini-N near-IR
spectroscopy provided a clear detection of {{{H}}}α
emission. The lensed source appears to be gravitationally magnified by a
massive foreground galaxy cluster lens at z = 0.44 modeling with
Lenstool indicates a lensing amplification factor of 11 ± 2. We
determine an intrinsic rest-frame 8-1000 μm luminosity,
{L}{IR}, of (1.3+/- 0.1)× {10}13
{L}⊙ , and a likely star formation rate (SFR) of ˜
500{--}2000 {M}⊙ {{yr}}-1. The SED shows a
remarkable similarity with the Cosmic Eyelash from optical-mid/IR to
submillimeter/radio, albeit at higher fluxes.
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Helmut
Dannerbauer