Computer Science
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009sitc.conf.4016p&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
Computer Science
Cosmology: Observations, Galaxies: Active, Infrared: Galaxies, Missions: Spica
Scientific paper
Heavily obscured and Compton-thick Active Galactic Nuclei (AGN) may remain undetected even in the deepest X-ray and optical surveys. In the last few years, thanks to Spitzer observations, it has been realized that mid-IR (MIR) observations can provide a viable and, in some cases, unique alternative to X-ray and optical searches for the most obscured AGN. The Spitzer spectrometer IRS has identified some of these sources up to z ~ 2.5 (due to the spectral coverage), and, by characterizing the MIR spectrum, has allowed to disentangle the different contribution of accretion and star-formation processes to the observed MIR emission. The spectro-photometry mode of SAFARI, on board of SPICA, will extend the IRS study to higher redshift (> 2.5 - 3), characterizing the restframe MIR spectrum of dust-obscured galaxies and AGNs. This will allow us to witness the dust-enshrouded blackhole/galaxy formation epoch.
Comastri Andrea
Gruppioni Carlotta
Magliocchetti Manuela
Pozzi Francesca
Spinoglio Luigi
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