Large-scale dynamo of accretion disks around supermassive nonrotating black holes
| Autor: | O. P. Kuznechik, N. I. Stetyukevich, A. L. Poplavsky |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Physics
Active galactic nucleus MHD lcsh:Astronomy Astrophysics::High Energy Astrophysical Phenomena accretion disks galaxies: active Astronomy Magnetosphere Astronomy and Astrophysics Astrophysics magnetic fields Accretion (astrophysics) Magnetic field lcsh:QB1-991 General Relativity and Quantum Cosmology Accretion disc accretion Intermediate-mass black hole Magnetohydrodynamics Astrophysics::Galaxy Astrophysics Dynamo |
| Zdroj: | Serbian Astronomical Journal, Vol 2006, Iss 173, Pp 49-55 (2006) |
| ISSN: | 1820-9289 |
| Popis: | In this paper one presents an analytical model of accretion disk magnetosphere dynamics around supermassive nonrotating black holes in the centers of active galactic nuclei. Based on general relativistic equations of magneto hydrodynamics, the nonstationary solutions for time-dependent dynamo action in the accretion disks, spatial and temporal distribution of magnetic field are found. It is shown that there are two distinct stages of dynamo process: the transient and the steady-state regimes, the induction of magnetic field at t > 6:6665 x 1011GM/c3 s becomes stationary, magnetic field is located near the innermost stable circular orbit, and its value rises up to ~ 105 G. Applications of such systems with nonrotating black holes in real active galactic nuclei are discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|