| |
 |
| Paper: |
The Relationship Between Optical and X-ray Variability in Seyfert Galaxies |
| Volume: |
360, AGN Variability from X-Rays to Radio Waves |
| Page: |
101 |
| Authors: |
Uttley, P. |
| Abstract: |
Studying simultaneous optical and X-ray light curves of radioquiet AGN can help to probe the relationship between very different physical components - the cool, optically thick disk and hot, optically thin corona. Here, we review the relationship between optical and X-ray variability in Seyfert galaxies, which due to observing constraints was difficult to study for many years, but was given a huge boost with the launch of the RXTE satellite in 1995. We summarise the diverse results of several monitoring campaigns, which pose a challenge for standard theories relating optical and X-ray variability, with sources showing either correlated optical and X-ray flux variations, correlated optical flux and X-ray spectral variations, or no correlation at all. We discuss possible explanations for these results, some of which may be explained using a more standard AGN picture, while others may require additional components, such as the 2-phase accretion flows suggested to explain black hole X-ray binary behavior. |
|
|
|
|
|
