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OATS-DAUT SEMINAR
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Speaker:
Carlotta Gruppioni (INAF/Oss. Astr. Bologna)
Title:
Galaxy and AGN Evolution in the MIR: a combined Spitzer
and X-ray view
Date: Wednesday, October 18th, 2006
Time: 15:00 (3:00 PM)
Venue: Villa Bazzoni
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Abstract:
A proper analysis of the evolution of sources emitting in the
Mid-Infrared is strongly dependent on their broad-band spectral
properties (SEDs) at different redshifts and luminosities and on a
reliable classification allowing to disentangle AGN from
star-formation activity. The diagnostic diagrams based on the optical
line ratios are often ambiguous and/or misleading not allowing a
proper separation of the galaxy/AGN populations. Thanks to the
combination of deep X-ray and Spitzer a much better census of the
hidden AGN activity and dust-obscured star-forming galaxies can be
obtained. We show how to take advantage of the new X-ray and Spitzer
survey data to constrain galaxy and AGN evolution, revising the
results of previous phenomenological models.
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