ASPCS
 
Back to Volume
Paper: The Scaling of X-ray Variability with Black Hole Mass in AGNs
Volume: 360, AGN Variability from X-Rays to Radio Waves
Page: 97
Authors: Papadakis, I.E.
Abstract: There exists a significant correlation between the 2 − 10 keV, excess variance (measured on both long and short time scales) and the black hole mass in AGNs. This relation is consistent with the assumption that the 2 − 10 keV power spectrum in these objects has a “universal” shape. It has a slope of −1 up to a break frequency (which decreases with increasing black hole mass) while it steepens to a slope of −2 at higher frequencies. Based on this result, the excess variance measurements can be used to provide black hole mass estimates for AGNs which are consistent with values obtained using other methods.
Back to Volume