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

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• 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

• SHIBATA Kazunari

  Kwasan and Hida Observatories, Department of Astronomy, Kyoto University

• Kudoh T

  Univ. Western Ontario Ontario Can

• Kudoh Takahiro

  Department Of Physics And Astronomy University Of Western Ontario

• Koide Shinji

  Department Of Engineering Toyama University

• Shibata K

  Kwasan And Hida Observatories Kyoto University

• Shibata Kazunari

  Kwasan And Hida Observatories Kyoto University

• AOKI Seiichiro

  Department of Earth and Space Science, Graduate School of Science, Osaka University

• NAKAYAMA Kunji

  Faculty of Law, Ryukoku University

• Aoki Seiichiro

  Department Of Earth And Space Science Graduate School Of Science Osaka University

• Nakayama K

  Kyoto Univ. Kyoto Jpn

• Nakayama Kunji

  Faculty Of Law Ryukoku University

• Shibata Kazunari

  Kwasan And Hida Observatories Department Of Astronomy Kyoto University

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