Multi-wavelength emission and accretion physics in Low Luminosity Active Nuclei

Accretion of matter onto a super massive black hole (SMBH) is believed to be the dominant mechanism for the emission production in Active Galactic Nuclei (AGN). Whether low luminosity AGN (LLAGN) are a scaled-down luminosity version of classical AGN or objects powered by different physical mechanism is a debated issue. LLAGN could indeed represent scaled up versions of black hole binaries in the steady-jet, hard X-ray state, as pointed out by scaling relations recently found. We investigated the correlations between X-ray, optical and radio luminosities for a sample of low luminosity Seyfert galaxies. The observed radiative output combined with black hole mass estimates, allowed us to measure the Eddington ratios and, therefore investigate the fundamental scaling of black hole properties with black hole mass and accretion rate.

 

Fecha: 
25/04/2007 - 14:00
Conferenciante: 
Francesca Panessa
Filiación: 
Instituto de Física de Cantabria (CSIC-UC)


Seminarios