The Effectiveness of Mid/Far IR Blind, Wide Area, Spectral Surveys in Breaking the Confusion Limit

Details The Effectiveness of Mid/Far IR Blind, Wide Area, Spectral Surveys in Breaking the Confusion Limit The Effectiveness of Mid/Far IR Blind, Wide Area, Spectral Surveys in Breaking the Confusion Limit

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009sitc.conf.4019r&link_type=abstract

SPICA joint European/Japanese Workshop, held 6-8 July, 2009 at Oxford, United Kingdom. Edited by A.M. Heras, B.M. Swinyard, K.G

Physics

Galaxies: Formation, Missions: Spica

Scientific paper

Source confusion determines the useful depth to which to take large-area extragalactic surveys. 3D imaging spectrometers, with positional as well as spectral information, however, can potentially provide a means by which to break the traditional confusion limit.
In this poster we present the results of our investigation into the effectiveness of mid/far infrared, blind, wide area spectroscopic surveys with SAFARI in breaking through the confusion limit. We generate an artificial sky representative of 100 SAFARI footprints based on two galaxy evolution models: bright-end and burst-mode. Using a fully automated redshift determination method we find we can accurately estimate redshifts for 37 and 53% of sources with continuum fluxes that are as much as an order of magnitude below the traditional continuum confusion limit (at 120 μm) for the bright-end and burst-mode evolution models respectively. Our results suggest that deep, blind spectral line surveys with SAFARI will be able to break the traditional photometric confusion limit, allowing us to resolve a significant number of previously inaccessible galaxies, and so potentially to differentiate between different galaxy evolution models.

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