Modelling the IDV Emissions of the BL Lac Objects with a Langevin Type Stochastic Differential Equation

C. S. Leung, J. Y. Wei, T. Harko, Z. Kovacs

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)


In this paper, we introduce a simplified model for explaining the observations of optical intra-day variability (IDV) of the BL Lac Objects. We assume that the source of the IDV are the stochastic oscillations of an accretion disk around a supermassive black hole. The stochastic fluctuations on the vertical direction of the accretion disk are described by using a Langevin type equation with a damping term and a random, white noise type force. Furthermore, preliminary numerical simulation results are presented, which are based on the numerical analysis of the Langevin stochastic differential equation.

Original languageEnglish
Pages (from-to)189-192
Number of pages4
JournalJournal of Astrophysics and Astronomy
Issue number1
Publication statusPublished - 30 Jul 2011
Externally publishedYes


  • BL Lac objects
  • Langevin type stochastic differential equation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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