The Deep Infrared Sky

Details The Deep Infrared Sky The Deep Infrared Sky

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop...81r&link_type=abstract

Spitzer Proposal ID #81

Physics

Scientific paper

To determine the source of the cosmic infrared background requires imaging at sufficiently deep levels to detect the individual sources producing the background. The highest redshift, most luminous sources will be powered by powerful starbursts or by non-thermal process driven by massive black holes in the object's nucleus. SIRTF photometric data alone will not be able to distinguish these two power sources based on experience from the Ultra-Luminous Infrared Galaxies discovered by IRAS. The simplest method of distinguishing between starbursts and AGN is to examine x-ray fluxes. Three layers of surveying will be used to detect adequate numbers of galaxies at both moderate and faint fluxes. Because only IRAS data are available between 1- and 175µm, some surveying to moderate depth is required to get adequate numbers of galaxies for tying IRAS data to the deepest counts. Deeper surveys will be conducted in selected areas, all with deep x-ray observations. A few SIRTF fields of view will be observed to hard confusion limits.

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