DISCOVERY OF A MULTIPLY LENSED SUBMILLIMETER GALAXY IN EARLY HerMES HERSCHEL/SPIRE DATA

A Conley; A Cooray; S Kim; A Amblard; J. D Vieira; A Blain; J Bock; C. M Bradford; C Bridge; J. M Carpenter; E. A. Gonzalez Solares; J. E Aguirre; R Auld; A. J Baker; A Beelen; R Blundell; D Brisbin; D Burgarella; P Chanial; E Chapin; H Fu

doi:10.1088/2041-8205/732/2/L35

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DISCOVERY OF A MULTIPLY LENSED SUBMILLIMETER GALAXY IN EARLY HerMES HERSCHEL/SPIRE DATA

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DISCOVERY OF A MULTIPLY LENSED SUBMILLIMETER GALAXY IN EARLY HerMES HERSCHEL/SPIRE DATA

A Conley, A Cooray, S Kim, A Amblard, J. D Vieira, A Blain, J Bock, C. M Bradford, C Bridge, J. M Carpenter, …

Astrophysical journal. Letters, Vol.732(2), p.L35

05/10/2011

DOI: 10.1088/2041-8205/732/2/L35

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Abstract

We report the discovery of a bright (f(250 {mu}m)>400 mJy), multiply lensed submillimeter galaxy HERMES J105751.1+573027 in Herschel/SPIRE Science Demonstration Phase data from the HerMES project. Interferometric 880 {mu}m Submillimeter Array observations resolve at least four images with a large separation of {approx}9''. A high-resolution adaptive optics K{sub 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 {mu} {approx} 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) x 10{sup 13} L{sub sun}, implying a star formation rate of {approx}2500 M{sub sun} yr{sup -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.

Physical Properties

ASTROPHYSICS, COSMOLOGY AND ASTRONOMY

ENERGY SPECTRA

GALAXIES

IMAGES

LUMINOSITY

OPTICAL PROPERTIES

SPECTRA

Details

Title: Subtitle: DISCOVERY OF A MULTIPLY LENSED SUBMILLIMETER GALAXY IN EARLY HerMES HERSCHEL/SPIRE DATA
Creators: A Conley - University of Colorado Boulder
A Cooray - University of California, Irvine
S Kim - University of California, Irvine
A Amblard - University of California, Irvine
J. D Vieira - California Institute of Technology
A Blain - California Institute of Technology
J Bock - California Institute of Technology
C. M Bradford - California Institute of Technology
C Bridge - California Institute of Technology
J. M Carpenter - California Institute of Technology
E. A. Gonzalez Solares - University of Cambridge
J. E Aguirre - University of Pennsylvania
R Auld - Cardiff University
A. J Baker - Rutgers, The State University of New Jersey
A Beelen - Université Paris-Sud
R Blundell - Harvard University
D Brisbin - Cornell University
D Burgarella - Aix-Marseille Université
P Chanial - Université Paris Diderot
E Chapin - University of British Columbia
H Fu - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: Astrophysical journal. Letters, Vol.732(2), p.L35
DOI: 10.1088/2041-8205/732/2/L35
ISSN: 2041-8205
eISSN: 2041-8213
Publisher: The American Astronomical Society
Language: English
Date published: 05/10/2011
Academic Unit: Physics and Astronomy
Record Identifier: 9984199722702771

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