Stochastic Resonance of Accretion Disk and the Persistent Low-Frequency Quasi-Periodic Oscillations in Black Hole X-ray Binaries

Journal of astrophysics and astronomy

L. Y. Zhang¹  D. X. Wang²  P. J. Chen¹  Z. Y. Wang1¹ 

[1] School of Physics and Electronic Engineering, Hubei University of Arts and Science, Xiangyang, China$$;School of Physics, Huazhong University of Science and Technology, Wuhan, China$$

关键词: Accretion disks;    power spectral density;    stochastic resonance.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

In this paper, we use a Langevin type equation with a damping term and stochastic force to describe the stochastic oscillations on the vertical direction of the accretion disk around a black hole, and calculate the luminosity and power spectral density (PSD) for an oscillating disk. Then we discuss the stochastic resonance (SR) phenomenon in PSD curves for different parameter values of viscosity coefficient, accretion rate, mass of black hole and outer radius of the disk. The results show that our simulated PSD curves of luminosity for disk oscillation have the same profile as the observed PSD of black hole X-ray binaries (BHXBs) in the lowhard state, and the SR of accretion disk oscillation may be an alternative interpretation of the persistent low-frequency quasi-periodic oscillations (LFQPOs).

【 授权许可】

Unknown