Other
Scientific paper
Jun 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20680c&link_type=abstract
Spitzer Proposal ID #20680
Other
Scientific paper
Our very deep low-frequency (325 MHz) radio observations of the Bootes deep field provide an excellent opportunity to study the evolution of the most distant and powerful radio galaxies, in addition to examining the "normal" radio galaxies which make up the bulk of the radio population at more moderate redshifts. Many previous studies have focussed on the most extreme objects, and we wish to put these studies into context by carrying out a census of the radio population over a range in radio spectral index down to sub-mJy radio flux levels. The release into the archive this semester of the IRAC and MIPS data in this field make this project tractable and timely. By extracting SED information from the Spitzer data, combined with data from the NOAO Deep Wide Field Survey and radio flux and radio "color" (spectral index) information, we can understand the different populations of AGN and starburst galaxies and connections between them. By measuring correlation functions we can understand their clustering and their interrelationships with their environments. The Spitzer data will allow us to fit IR luminosity functions for the radio sources, and in conjunction with other statistical tools, to determine the evolution of these objects. And comparison with other studies of this field will enable us to tell how the various populations of radio sources are related to other types of object. The Spitzer, NDWFS and 1.4 GHz radio data on this field already provide a tantalising opportunity to discover the connections between the IR, optical and radio populations; the addition of our low-frequency radio data provides a key discriminator which will enable us to understand these populations more fully.
Breugel Wil van
Croft Steve
de Vries Wim
Stanford Adam
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