Abstract
We investigate the magnetohydrodynamic (MHD) process in thin accretion disks. The relevant momentum as well as magnetic reduction equations in the thin disk approximation are included. On the basis of these equations, we examine numerically the stationary structures, including distributions of the surface mass density, temperature and flow velocities of a disk around a young stellar object (YSO). The numerical results are as follows: (i) There should be an upper limit to the magnitude of magnetic field, such an upper limit corresponds to the equipartition field. For relevant magnitude of magnetic field of the disk’s interior the disk remains approximately Keplerian. (ii) The distribution of effective temperature T(r) is a smoothly decreasing function of radius with power index γ -1/2, corresponding to the observed radiation flux density, provided that the magnetic field is suitably chosen.
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References
Shakura, N. I., Sunyaev, R. A., Black holes in binary systems, Observational appearance, A&A, 1973, 24: 337–355.
Balbus, S. A., Hawley, J. F., Instability, turbulence, and enhanced transport in accretion disks, Rev. Mod. Phys., 1998, 70: 1–53.
Wang, J. C. L., Sulkanen, M. E., Lovelace, R. V. E., Self-collimated electromagnetic jets from magnetized accretion disks, Ap. J., 1990, 355: 38–43.
Lovelace, R. E. W., Wang, J. C. L., Sulkanen, M. E., Self-collimated electromagnetic jets from magnetized accretion disks, Ap. J., 1987, 315: 504–535.
Heyvaerts, J., MHD forces in astrophysical disks and jets, in Advance in Solar System MHD (eds. Priest, E. R., Hood, A. W.), Cambridge: Cambridge University Press, 1991, 400–423.
Pringle, J. E., Accretion disks in astrophysics, Ann. Rev. Astro. and Astrophys., 1981, 19: 137–162.
Beckwith, S. V. W., Protoplanetary disks, in Theory of Accretion Disks—2 (eds. Duschl, W. J., Frank, J., Meyer, F. et al.), Dordrecht: Kluwer Aca. Pub., 1994, 1–18.
Mineshige, S., Honma, A., Hirano, A. et al., Temperature profiles of accretion disks in X-ray binaries, in Theory of Accretion Disks—2 (eds. Duschl, W. J., Frank, J., Meyer, F. et al.), Dordrecht: Kluwer Aca. Pub., 1994, 187–193.
Kenyon, S. J., Hartmann, L. H., Spectral energy distributions of T Tauri stars: disk flaring and limits on accretion, Ap. J., 1987, 323: 714–733.
Shu, F. H., Tremaine, S., Adams, F. C. et al., Sling amplification and eccentric gravitational instabilities in gaseous disks, Ap. J., 1990, 358: 495–514.
Beckwith, S. V. W., Protostellar disks, in Structure and Emission Properties of Accretion Disks (eds. Bertour, C., Collin, S., Lasota, J. -P. et al.), Paris: Editions Frontiers, 1990, 33–42.
Balbus, S. A., Hawley, J. F., The origin of turbulent viscosity in accretion disks, in Physics of Accretion Disks (eds. Kato, S., Inayaki, S., Mineshige, S. et al.), Kyota: OPA, 1996, 279–284.
Königl, A., Magnetized accretion disks and the origin of bipolar flows, in Theory of Accretion Disks—2 (eds. Duschl, W. J., Frank, J., Meyer, F. et al.), Dordrecht: Kluwer Aca. Pub., 1994, 53–67.
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Xiaoqing, L., Haisheng, J. Structures of magnetized thin accretion disks. Sci. China Ser. A-Math. 45, 1487–1496 (2002). https://doi.org/10.1007/BF02880044
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DOI: https://doi.org/10.1007/BF02880044