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OATS-DAUT SEMINAR
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Speaker:
Francesca Panessa (INAF-IASF, Roma, I)
Title:
The radio and X-ray coupling in radio quiet AGN
Date: Wednesday, February 25th, 2009
Time: 12:00
Venue: Villa Bazzoni
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Abstract:
Sensitive observations reveal that radio-quiet Active Galactic Nuclei (AGN) are
not radio silent. In this respect, there is growing interest in the
understanding of the origin of their radio emission, which is so far poorly
constrained. Recently, we have found a correlation between the
nuclear 2-10 keV X-ray and radio luminosities for a
well defined sample of local Seyfert galaxies, suggesting that the accretion
flow and the radio source are strongly coupled. This is expected in low
luminosity AGN where the advection-dominated accretion flow (ADAF)
should be coupled with a compact radio jet. However, the same correlation
has been found also for high luminosity AGN where a
standard accretion thin disk is responsible for the high energy emission.
We will explore the radio and X-ray observational properties of both
low and high luminosity AGN in order to shed light on their
inner radiation mechanisms and accretion physics.
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contact: Paolo Tozzi (OATS)