Time Variabilities of Optically Thin Black Hole Accretion Disks Reproduced by 3D MHD Simulations
書誌事項
- タイトル別名
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- Time Variabilities of Optically Thin Black Hole Accretion Disks Reproduced by 3D MHD Simulations(Poster) :
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説明
We analysed the results of long time-scale global three-dimensional resistive magnetohydrodynamic simulations of radiatively inefficient accretion flows onto a black hole. We found that the power spectral density (PSD) of the time variation of the mass accretion rate has a power law dependence f^<-a> with index a~1.5 in the frequency range 1M_<10>^<-1>Hz<f<80M_<10>^<-1>Hz, where M_<10>=M/10M_<⊙> is the mass of the black hole. The PSD has a high frequency break at f~80M_<10>^<-1>Hz, above which a~2.4, and another break in the lower frequency range at f~1M_<10>^<-1>Hz. Numerical results indicate that the high frequency break is related to disk oscillation in the innermost region of the disk. The lower frequency break of the PSD is due to the quasi-periodic mass accretion from the outer region.
収録刊行物
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- Progress of Theoretical Physics Supplement
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Progress of Theoretical Physics Supplement 155 371-372, 2004
Oxford University Press (OUP)
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詳細情報 詳細情報について
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- CRID
- 1360003446877758464
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- NII論文ID
- 110001216421
- 210000127860
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- NII書誌ID
- AA00791466
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- ISSN
- 03759687
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