Quasi-Periodic Inward Shock Formation from an Accretion Disk to a Black Hole and Its Application to Quasi-Periodic Oscillations in Microquasars(Poster)
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概要
- 論文の詳細を見る
We performed 1.5D general relativistic simulations using a Kerr metric without disk viscosity for a model of high frequency quasi-periodic oscillations (QPOs) in microquasars. We found that quasi-periodic inward shock waves propagate from the accretion disk toward the black hole when we initially inject a disturbance into the disk. The frequency of the shock formation is approximately equal to the maximum epicyclic frequency in the disk (κ_<max>), which is on the order of the frequency of high frequency QPOs in microquasars. κ_<max> depends on the rotation of the black hole, and therefore we can estimate the value of the spin parameter of a black hole candidate (BHC) in a microquasar by comparing the high frequency QPO with κ_<max>. We found that such values can be roughly estimated as 0.0 ≤ a < 0.4 for GRS 1915+105 and 0.85 < a < 1.0 for GRO J1655-40.
- 理論物理学刊行会の論文
- 2004-11-15
著者
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Kudoh Takahiro
Department Of Physics And Astronomy University Of Western Ontario
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Koide Shinji
Department Of Engineering Toyama University
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Aoki Seiichiro
Department Of Earth And Space Science Graduate School Of Science Osaka University
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Nakayama Kunji
Faculty Of Law Ryukoku University
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KOIDE Shinji
Faculty of Engineering, Toyama University
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Shibata Kazunari
Kwasan And Hida Observatories Department Of Astronomy Kyoto University
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KOIDE Shinji
Department of Engineering, Toyama University
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Koide Shinji
Laboratory for Plasma Astrophysics and Fusion Science, Faculty of Engineering, Toyama University
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Shibata Kazunari
Kwasan and Hida Observatories, Kyoto University
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KOIDE SHINJI
Department of Agricultural Chemistry, Faculty of Agriculture, Kyoto University
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