Stochastic Resonance of a General Relativistic Accretion Disk  

作　　者：WANG Zhi-Yun CHEN Pei-Jie ZHANG Liang-Ying 汪志云;陈培杰;张良英(School of Physics and Electronic Engineering,Hubei University of Arts and Science,Xiangyang 441053)

机构地区：[1]School of Physics and Electronic Engineering,Hubei University of Arts and Science,Xiangyang 441053

出　　处：《Chinese Physics Letters》2013年第9期198-201,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 11045004;the Research Foundation of Hubei Provincial Department of Education under Grant No D20132603;the Fundamental Research Foundation of Hubei University of Arts and Science under Grant No 2010YA017.

摘　　要：Based on a generalized Langevin equation,we consider a full general relativistic model to describe the vertical oscillations of particles in accretion disks around compact astrophysical objects,and calculate oscillating lumi-nosity and power spectral density(PSD)of an accretion disk.The influences of the friction parameter𝜂,spin parameter𝑏α,and mass𝑁of the center compact object on the stochastic resonance(SR)in PSD curves are discussed.The results show that a large spin parameter𝑏α,can enhance the SR phenomenon,but the larger the𝜂ζor M𝑁is,the weaker the SR phenomenon becomes.In addition,our simulated PSD curves of the output luminosity of stochastically oscillating disk have the same profile as the observed PSD of x-ray binaries,and the resonance peak in the PSD curve can interpret the quasi-periodic oscillations at the same time.

关 键 词：OSCILLATING STOCHASTIC FRICTION 

分 类 号：R74[医药卫生—神经病学与精神病学]