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Black hole selected X - ray binary Cyg X-1 light curve

Author: DongAiJun
Tutor: WangJianCheng
School: Graduate School , Chinese Academy of Sciences (Yunnan Observatory )
Course: Astrophysics
Keywords: Black hole X-ray binaries Light curve Cyclical changes of the light curve Spectral correlation
CLC: P145.8
Type: Master's thesis
Year: 2003
Downloads: 68
Quote: 0
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Abstract


This article focuses on the black X-ray double Starlight variable curve , as well as periodic features . The black hole is a stellar gravitational collapse and the formation of a large mass of compact objects , almost all of the black hole X-ray novae . Until now , we have found that about 18 black hole X-ray binaries . Through the study of the light curve , the radiation mechanism is of great significance for understanding its evolution . At the same time , in order to further understand the physical processes of the black hole , by studying the periodic variation of the black hole state as well as its light curve has been a very important method . Typically , the state of black hole X - ray binaries are divided into hard state , soft state , as well as static . Hard state : generally lower luminosity power-law radiation hard photon bremsstrahlung produced in the coronal region . Soft state : generally higher luminosity , thermal radiation , the soft photon major blackbody radiation generated in the accretion disk . Static : the luminosity is generally very weak , but also to the power-law radiation . In this paper mainly studied the spectral correlation first discovered black hole binary CygX-1 , as well as the cyclical changes of the light curve . At the same time , we hope that using simple mathematical knowledge , that is, for a periodic function F (x) and its derivative F (x) has the same periodicity , the periodic inspection of the celestial . Our common method ( fast Fourier transform ( Fast Fourier Transition FFT) , cycle superimposed ( Folding Period method )) compared to more satisfactory results .

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CLC: > Astronomy,Earth Sciences > Astronomy > Astrophysics > Stellar physics > Collapsing star ( black hole)
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