Mathematics – Logic
Scientific paper
Feb 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007noao.prop..566s&link_type=abstract
NOAO Proposal ID #2007A-0566
Mathematics
Logic
Scientific paper
We propose a coordinated spectroscopic campaign to study a large, statistically-complete sample of mid-infrared selected AGN. The targets are all from the Bootes field, the target of two NOAO Survey Programs (NDWFS & FLAMEX) as well as extensive additional follow-up across the electromagnetic spectrum. Using Spitzer, we have demonstrated that mid-infrared observations provide an efficient and robust method to identify AGN. However, spectroscopy to date has predominantly focused on unobscured, or type 1, AGN, systematically avoiding obscured, or type 2, AGN which are expected to outnumber the type 1 population. Fundamental questions regarding type 2 AGN remain unanswered, beginning with issues as basic as their cosmic census. These issues are of looming importance as we strive to understand the interplay of AGN feedback in galaxy formation. This proposed program will provide spectroscopic data for nearly 1000 obscured AGN, providing the largest such sample at cosmological redshifts. A matched spectroscopic sample of unobscured AGN in the same field is already in hand. Together, these data will conclusively address fundamental questions in AGN studies, beginning with the most basic issue of how the obscured AGN fraction depends on redshift and luminosity.
Brodwin Mark
Brown Michael J. I.
Cool Richard R.
Dey Arjun
Eisenhardt Peter
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