Hot-spot model for accretion disc variability as random process

2008/07/01 by Tomáš Pecháček, T. Pechacek, V. Karas +1
Decision Sciences · Earth and Planetary Sciences · Physics and Astronomy · #Astrophysical Phenomena and Observations #High-pressure geophysics and materials #Scientific Measurement and Uncertainty Evaluation #astro-ph

paper · pdf · doi:10.1051/0004-6361:200809720

published as Astronomy and Astrophysics 487 (2008) 815-830 · 18 pages, 9 figures; Astronomy & Astrophysics accepted

arxiv created 2008/07/01 · openalex publication_date 2008/07/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31

Abstract

Aims. Theory of random processes provides an attractive mathematical tool to describe the fluctuating signal from accreting sources, such as active galactic nuclei and Galactic black holes observed in X-rays. These objects exhibit featureless variability on different timescales, probably originating from an accretion disc.

Citations

• Thunderclouds and accretion discs: a model for the spectral and temporal variability of Seyfert 1 galaxies
• Spectra of some self-exciting and mutually exciting point processes
• On the influence of relativistic effects on X-ray variability of accreting black holes
• Studying accreting black holes and neutron stars with time series: beyond the power spectrum