Monday, Jan 10, 2011, 9:00 AM - 6:30 PM
Using Non-linear X-ray Variability to Explore the Core of Active Galaxy 3C 390.3
, K. Marshall
Rochester Institute of Technology,
Luminous variability of active galaxies is a universal phenomenon; however, there is no universally accepted causal mechanism. This study investigated variability of the broad line radio galaxy 3C 390.3. We concentrated on variability in the X-ray regime (2-10 keV), which is quite rapid-a consequence of the radiation source being proximal to the super massive black hole. Such variability can be explained by accretion disk models; however, there are numerous plausible but physically distinct models. We sought to isolate a particular accretion model which accurately describes the X-ray features for this galaxy. After performing a detailed time series analysis, with a focus on linearity tests, our results imply with high confidence that a non-linear multiplicative model is generating the variability. Given this criterion, we assert that the propagating viscosity fluctuation model is best suited for describing the observed X-ray behavior of this galaxy.
This work was supported by the Bucknell University REU program which is funded by the National Science Foundation.
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