Physics
Scientific paper
Mar 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009sptz.prop50476g&link_type=abstract
Spitzer Proposal ID #50476
Physics
Scientific paper
The search for and the characterization of highly obscured Active Galactic Nuclei, witnessing the co-eval growth of the Super Massive Black Holes (SMBHs) and stellar mass assembly at high (z~1.5-2.5) redshift, is a fundamental step towards a better understanding of galaxy and AGN evolution. The main scientific driver of the present proposal is to obtain good-quality Spitzer IRS spectra of a large sample of 78 bright MIPS (24 micron) selected sources, most likely hosting the most extreme examples (in terms of luminosity and obscuration) of accreting SMBHs at the epoch (z~2) of the peak of quasar and star-formation activity. The proposed observations, combined with the multi-wavelength database already available, will allow us to measure robust spectroscopic redshifts and to evaluate the amount of dust obscuration and star-formation through the detection of silicate absorption and PAH emission features. The ultimate goal is to assess the relative contribution of accretion and star-formation driven processed and to test the current hypotheses on the (obscured) growth of SMBHs and their host galaxies at high redshifts.
Gruppioni Carlotta
Vignali Cristian
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