Abstract
A new model is presented to elucidate the optical-ultraviolet flickering variability in cataclysmic variables. In this model, light fluctuations are produced by occasional flarelike events and subsequent avalanche flow in the accretion disk atmospheres. Flares are assumed to be ignited when the mass density exceeds a critical density. The disk then evolves to and stays at a self-organized critical state, in which seemingly chaotic fluctuations can be produced. We calculated fluctuating light curves by cellular-automaton simulations. The resultant power spectral density (PSD) consists of a flat part [S(f) ∝ f0, where f is frequency] at lower frequencies and a steep-decline part [S(f) ∝ f-β, with β 1-2] at higher frequencies. It is important that the PSD is rather insensitive to wavelength.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
