2015/10/01 by M. Grzedzielski, Mikołaj Grzędzielski, Petra Suková +3 · 4 citations
Computer Science · Physics and Astronomy · #Astronomy #Astrophysics #CHAOS (operating system) #Chaos control and synchronization #Nonlinear Dynamics and Pattern Formation #Physics #Quantum chaos and dynamical systems #astro-ph.HE
paper · pdf · doi:10.1007/s12036-015-9356-7
published in Journal of Astrophysics and Astronomy 36(4) (Springer Nature) · arXiv admin note: text overlap with arXiv:1506.02526
arxiv created 2015/10/01 · openalex publication_date 2015/12/01 · arxiv updated 2016/01/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Hardly any of the observed black hole accretion disks in X-Ray binaries and active galaxies shows constant flux. When the local stochastic variations of the disk occur at specific regions where a resonant behaviour takes place, there appear the Quasi-Periodic Oscillations (QPOs). If the global structure of the flow and its non-linear hydrodynamics affects the fluctuations, the variability is chaotic in the sense of deterministic chaos. Our aim is to solve a problem of the stochastic versus deterministic nature of the black hole binaries vari- ability. We use both observational and analytic methods. We use the recurrence analysis and we study the occurence of long diagonal lines in the recurrence plot of observed data series and compare it to the sur- rogate series. We analyze here the data of two X-Ray binaries - XTE J1550-564, and GX 339-4 observed by Rossi X-ray Timing Explorer. In these sources, the non-linear variability is expected because of the global conditions (such as the mean accretion rate) leading to the pos- sible instability of an accretion disk. The thermal-viscous instability and fluctuations around the fixed-point solution occurs at high accretion rate, when the radiation pressure gives dominant contribution to the stress tensor.