Bibcode
Díaz-Sánchez, A.; Iglesias-Groth, S.; Rebolo, R.; Dannerbauer, H.
Referencia bibliográfica
The Astrophysical Journal Letters, Volume 843, Issue 2, article id. L22, 5 pp. (2017).
Fecha de publicación:
7
2017
Número de citas
13
Número de citas referidas
12
Descripción
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.
Proyectos relacionados
Gas Molecular y Polvo en Galacias através del Tiempo Cósmico
Dos cuestiones fundamentales en la Astrofísica son la conversión de gas molecuar en estrellas y cómo este proceso físico depende del entorno en todas las escalas, desde sistemas planetarios, cúmulos estelares, galaxias hasta cúmulos de galaxias. El objectivo principal de este proyecto es el de estudiar la formación y evolución de galaxias a partir
Helmut
Dannerbauer