The Herschel Lensing Survey: First Results on a z=2.8 Lensed Submillimeter Galaxy behind the Bullet Cluster (1E0657-56)

Details The Herschel Lensing Survey: First Results on a z=2.8 Lensed Submillimeter Galaxy behind the Bullet Cluster (1E0657-56) The Herschel Lensing Survey: First Results on a z=2.8 Lensed Submillimeter Galaxy behind the Bullet Cluster (1E0657-56)

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21544006r&link_type=abstract

American Astronomical Society, AAS Meeting #215, #440.06; Bulletin of the American Astronomical Society, Vol. 42, p.397

Astronomy and Astrophysics

Astronomy

Scientific paper

Gravitational lensing by massive galaxy clusters provides the only means to sample an abundant population of intrinsically faint infrared galaxies which lie below the confusion limit of current infrared and submillimeter telescopes. The Herschel Lensing Survey will target 40 massive galaxy clusters with the PACS and SPIRE instruments on the Herschel Space Observatory to compile the first significant catalog of these galaxies. Measurements from 100--500 microns constrain the far-infrared spectral energy distributions of these sources, enabling photometric redshift estimates and characterizing their far-infrared luminosities and star formation rates. We present the analysis of the first of these observations, directed toward the Bullet Cluster (1E0657-56). Previous observations of this cluster from infrared to millimeter wavelengths have revealed a highly magnified background source located at redshift z > 2.5. However low resolution at submillimeter wavelengths has made it difficult to isolate the flux of the background source from the emission of bright cluster member galaxies. Herschel observations provide the highest resolution and highest sensitivity maps available at these wavelengths, helping to resolve these positional ambiguities and better characterize the background source.

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