your ID: 0278 
First Name: Qiang 
Last Name: Niu 
Affiliation: Yunnan Astronomical Observatory (YNAO) 

Title: Disk truncation in AGN: The influence of viscosity 
Authors: Qiang Niu 
Topic: 2 
Session: poster 

Abstract: We use the disk-corona model (Meyer et al. 2000) to investigate 
how the viscosity affects the truncation of disk in low-luminosity AGN (LLAGN) and high/low state transition in AGN. 
Previous studies show that the corona structure may depend strongly on the value of viscosity. We attempt to do detailed 
calculations of the coronal structure for a series value of viscous 
coefficient \\alpha. We\'ll give an analytical relation between the mass 
flowing rate and \\alpha, and a relation between the truncation radius 
and the viscosity. We expect that our results may improve the interpretation of spectral 
transition between soft and hard states, and the truncation radius in LLAGN.