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Model of Hydromagnetic Turbulence in Accretion Disks

Research Project

Project/Area Number 05640310
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Astronomy
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

KATO Shoji  Kyoto Univ., Facnlty of Scrence, Prof., 理学部, 教授 (80011534)

Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1994: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1993: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsAccretion Dishs / Turbulence / 乱流粘性
Research Abstract

Models of turbulence which can be applied to studying structure and oscillations of accretion disks must be those in which effects of inhomogeneity and nonsteadiness of turbulence are included in the modeling. Considering this point, we construct a model of hydrodynamic turbulence in disks by decribing the aggregate of turbulence by the Boltzmann equation (Kato and Inagaki) .
Next, we derive a madel of hydrodynamic turbulence satisfying the above requirements by a second-order closure modeling (Kato) . The pressure-stain tensor is modeled by a stadard way known in turbulence thory. The results is found to be an extension of those obtained by the method of Boltzmann equation.
The second-order closure modeling mentioned above is extended to a modeling of hydromagnetic turbulence (Kato and Yoshizawa) . In this modeling, a usual modeling of the pressure-stain correlation in hydrodynomic turbulence must be extended to hydromagnetic case. Furthermore, a third-order correlation representing an interaction between dynamic turbulence and magnetic one should be modeled. We made these modeling by using the direct interaction approximation. The results of this modeling of hydromagnetic turbulence was submitted to a journal.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (30 results)

All Other

All Publications (30 results)

  • [Publications] S.Kato,X.B.Wu,L.T.Yang,Z.L.Yang: "Sonie Point Instability in Disc Accretion and Types of Stress Tensor" Monthly Notices Roy.Astron.Soc.260. 317-322 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.KAto and A.Yoshizawa: "A Model of Hydromagnetic Turbulence in Accvetion Disks" Publ.Astron.Soc.Japan. 45. 103-112 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.KAto: "Amplification of One-Armed Corrugation Waves in Geometrically Thin Relativistic Accretion Disks" Publ.Astron.Soc.Japan. 45. 219-231 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Nakao and S.Kato: "Vertical Dependence of X-Parameter in Accretion Disks" Publ.Astron.Soc.Japan. 46. 273-283 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Kato and S.Inagaki: "A Non-Local Description of Turbulence Stress Tensor in Accretion Disks" Publ.Astron.Soc.Japan. 46. 289-299 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Kato and M.Tosa: "Excitation of Density Waves on Ram-Pressure-Deformed Galactic Disks" Publ.Astron.Soc.Japan. 46. 559-566 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Kato: "A Non-Local Description of Stress Tensor and Accretion Disk Structure and Stability" Publ.Astron.Soc.Japan. 46. 415-426 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Kato: "Turbulent Stress Tensor in Accretion Disks Derived by Second-Order Closure Modeling" Publ.Astron.Soc.Japan. 46. 589-596 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Yamazaki,S.Kato,S.Mineshige: "Excitation of Trapped Oscillations in Dwarf-Nova Accretion Disks" Publ.Astron.Soc.Japan. 47. 59-71 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Kato: "A Magnetic Turbulence Model in Accretion Disks" Theory of Accretion Disks-2(Kluwar Academic Publ). 389-402 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] F.Honma,R.Matsumoto,S.Kato: "Pulsational Instability of Relativistic Accretion Disks and the periodic Time Variability of NGC6814" Theory of Accretion Disks-2(Kluwar Academic Publ). 265-270 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] F.Honma,R.Matsumoto,S.Kato: "Numerical Simulations of Pulsationally Vnstable Accretion Disks around Supermassive Black Holes" Non-Linear Phenomena in Stellar Variability(Kluwar Academic Publ. 356-368 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Kato, X.B.Wu, L.T.Yang, and Z.L.Yang: "Sonic Point Instability in Disc Accretion and Types of Stress Tensor." Monthly Notices Roy.Astron.Soc.260. 317-322 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Kato and A.Yoshizawa: "A Model of Hydromagnetic Turbulence in Accretion Disks." Publ.Astron.Soc.Japan. 45. 103-112 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Kato: "Amplification of One-Armed Corrugation Waves in Geometrically Thin Relativistic Accretion Disks." Publ.Astron.Soc.Japan. 45. 219-231 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Nakao and S.Kato: "Vertical Dependence of alpha-Parameter in Accretion Disks." Publ.Astron.Soc.Japan. 46. 273-283 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Kata and S.Inagaki: "A Non-local Description of Turbulence Stress Tensor in Accretion Disks." Publ.Astron.Soc.Japan. 46. 289-299 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Kato and M.Tosa: "Excitation of Density Waves on Ram-Pressure-Deformed Galactic Disks." Publ.Astron.Soc.Japan. 46. 559-566 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Kato: "A Non-local Description of Stress Tensor and Accretion Disk Structure and Stability" Publ.Astron.Soc.Japan. 46. 415-426 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Kato: "Turbulent Stress Tensor in Accretion Disks Derived by Second-Order Closure Modeling." Publ.Astron.Soc.Japan. 46. 589-596 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Yamazaki, S.Kato, and S.Mineshige.: "Excitation of Trapped Oscillations in Dwarf-Nova Accretion Disks" Publ.Astron.Soc.Japan. 47. 59-71 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.A.Abamowicz, X.Chen, S.Kato, J.P.Lasota, and O.Regev: "Thermal Equilibria of Accretion Disks." Astrophys.J.Jan (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Kato: A Magnetic Turbulence Model in Accretion Disks in Theory of Accretion Disks-2ed.by W.Duschl, J.Frank, F.Meyer, and W.M.Tscharnuter. Kluwar Academic Publ., Dordrecht, 389-402 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] F.Honma, R.Matsumoto, and S.Kato: Pulsational Instability of Relativistic Accretion Disks and the Periodic X-ray Time Variability of NGC6814.in Theory of Accretion Disks-2ed.by W.Duschl, J.Frank, F.Meyer, and W.M.Tscharnuter. Kluwar Academic Publ., Dordrecht, 265-270 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] F.Honma, R.Matsumoto, and S.Kato: Numerical Simulations of Pulsationally Unstable Accretion Disks around Supermassive Black Holes in Nonlinear Phenomena in Stellar Variabilityed.by M.Takeuti and R.Buchler. Kluwer Academic Publ., Dordrecht, 365-368 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Shoji Kato: "A Model of Hydromagnetic Turbulence in Accretion Disks" Publ.Astron.Soc.Japan. 45. 103-112 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Shoji Kato: "Amplification of One-armed Corrugation Wares in Geometrically Thin Relativistic Accretion Disks" Publ.Astron.Soc.Japan. 45. 219-231 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Yasushi Nakao: "Vertical Deperdence of α-Parameter in Accretion Disks" Publ.Astron.Soc.Japan. 46(印刷中). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] Shoji Kato: "A Non-local Description of Turbulence" Publ.Astron.Soc.Japan. 46(印刷中). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] Shoji Kato: "Sonic Point Instubility in Disc Accretion and Types of Stress Tensor" Monthly Notices Royal Astron.Soc.260. 317-322 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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