The role of an accretion disk in AGN variability
arXiv:astro-ph/0409254
Abstract
Optically thick accretion disks are considered to be important ingredients of luminous AGN. The claim of their existence is well supported by observations and recent years brought some progress in understanding of their dynamics. However, the role of accretion disks in optical/UV/X-ray variability of AGN is not quite clear. Most probably, in short timescales the disk reprocesses the variable X-ray flux but at longer timescales the variations of the disk structure lead directly to optical/UV variations as well as affect, or even create, the X-ray variability pattern. We urgently need a considerable progress in time-dependent disk models to close the gap between the theory and the stream of data coming from the AGN monitoring.
arXiv commentslightly extended version of the text send to Proceedings of the conference "AGN variability from X-rays to Radio", 14-16 June 2004, Crimea, Ukraina
Cited by in corpus (6)
- Variability and stability in blazar jets on time scales of years: Optical polarization monitoring of OJ287 in 2005-2009
- The transverse proximity effect in the z ~ 2 Lyman-alpha forest suggests QSO episodic lifetimes of ~1 Myr
- First robotic monitoring of a lensed quasar: intrinsic variability of SBS 0909+532
- Ultraviolet and X-ray variability of NGC 4051 over 45 days with XMM-Newton and Swift
- Exploring possible relations between optical variability time scales and broad emission line shapes in AGN
- AGN variability in the age of VRO