Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011noao.prop..395r&link_type=abstract
NOAO Proposal ID #2011A-0395
Astronomy and Astrophysics
Astronomy
Scientific paper
``The Herschel Lensing Survey'' (HLS; PI: E. Egami; 292.3 hrs) is imaging a sample of 44 massive galaxy clusters in five far-infrared bands 100-500 (mu)m. The goal is to surpass the nominal confusion- limited depth of Herschel observations by taking advantage of the gravitational lensing power of massive clusters. Our ability to accurately determine galaxy dust properties, and hence total infrared luminosity, from the Herschel SEDs is curtailed by the degeneracy between dust temperature and galaxy redshift. Near-infrared imaging via CTIO/NEWFIRM provides vital photometry at wavelengths relatively unaffected by dust, allowing tighter constraints on photometric redshifts for the Herschel-detected population, while also enabling us to measure the stellar mass of cluster and low-redshift sources. At the same time, the images give us the precise astrometry required for future NIR spectroscopy of the optically-faint high-redshift Herschel sources. Here, we propose four nights of observing to obtain J and K_s band images for 10 HLS clusters. NEWFIRM's wide field of view is well matched to our SPIRE coverage, so only a single pointing is required per cluster.
Bridge Carrie
Egami Eiichi E.
Rawle Tim
Rex Marie
Walth Greg
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