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Prog. Theor. Phys. Vol. 62 No. 3 (1979) pp. 629-643

[ Full Text PDF : FREE ACCESS (1231K) ]

Magnetic Flare Model of Quasars and Active Galactic Nuclei

— Magnetized Accretion Disk around a Massive Black Hole —

Fumio Takahara

Department of Physics, Kyoto University, Kyoto 606

(Received February 1, 1979)

Abstract:

As a model of quasars and active galactic nuclei, we present the magnetic flare model which clarifies the connection between the primary energy source and the non-thermal phenomena. The behavior of the magnetic field generated in the accretion disk around a massive black hole is investigated in terms of the αω-dynamo and the magnetic buoyancy. The magnetic field is reponsible not only for the angular momentum transfer but also for the vertical energy transfer owing to the magnetic buoyancy.
Magnetic energy thus transferred should be released in the coronal region above the disk surface through its flare-like reconnection as in the solar flare. We expect that it will produce a variety of non-thermal activities characteristic to quasars and active galactic nuclei. We argue that the following scenario is compatible with various observations: A flare generates the relativistic shock behind which electrons are heated up to the relativistic energy. Subsequently, they produce X and γ rays by the inverse Compton scattering of low energy photons as well as emit from radio up to soft X photons by the synchrotron radiation.


URL : http://ptp.ipap.jp/link?PTP/62/629/
DOI : 10.1143/PTP.62.629

[ Full Text PDF : FREE ACCESS (1231K) ] Citation:

References:

  1. G. Di Cocco et al., Nature 270 (1977), 319[CrossRef].
  2. V. Schönfelder, Nature 274 (1978), 344[CrossRef].
  3. B. N. Swanenburg et al., Nature 275 (1978), 298.
  4. M. J. Rees, Physica Scripta 7 (1978), 193.
  5. J. G. Hills, Nature 254 (1975), 295[CrossRef].
  6. P. J. Young, Astrophys. J. 215 (1977), 36[CrossRef].
  7. G. A. Shields and J. C. Wheeler, Astrophys. J. 222 (1978), 667[CrossRef].
  8. J. Frank, Mon. Not. R. Astron. Soc. 184 (1978), 87.
  9. N. I. Shakura and R. A. Sunyaev, Astron. Astrophys. 24 (1973), 337.
  10. N. Shibazaki and R. Hoshi, Prog. Theor. Phys. 54 (1975), 706[PTP].
  11. S. Ichimaru, Astrophys. J. 214 (1977), 840[CrossRef].
  12. D. Lynden-Bell, Nature 223 (1969), 690[CrossRef].
  13. E. P. T. Liang and R. H. Price, Astrophys. J. 218 (1977), 247[CrossRef].
  14. G. A. Shields and J. C. Wheeler, Astrophys. Lett. 17 (1976), 69.
  15. F. Takahara, Prog. Theor. Phys. 60 (1978), 1606[PTP].
  16. M. Steenbeck, F. Krause and K. -H. Rädler, Z. Naturforsch. 21a (1966), 369.
  17. P. H. Roberts, in Mathematical Problems in the Geophysical Sciences 2, ed. W. H. Reid (Amer. Math. Soc., 1971), p. 129.
  18. E. N. Parker, Astrophys. J. 163 (1971), 255[CrossRef].
  19. S. I. Vainshtein and A. A. Ruzmaikin, Sov. Astron. -A. J. 15 (1972), 714; ibid. 16 (1972), 365.
  20. E. N. Parker, Ann. Rev. Astron. Ap. 15 (1977), 45.
  21. E. N. Parker, Space Sci. Rev. 9 (1969), 651.
  22. E. N. Parker, Astrophys. J. 122 (1955), 293[CrossRef].
  23. E. N. Parker, Astrophys. J. 198 (1975), 205[CrossRef].
  24. H. Tananbaum et al., Astrophys. J. 223 (1978), 74[CrossRef].
  25. Z. Svestka, Solar Flares (Dordrecht, Reidel, 1976).
  26. R. D. Blandford and C. F. McKee, Mon. Not. R. Astron. Soc. 180 (1977), 343.
  27. R. D. Blandford, C. F. McKee and M. J. Rees, Nature 267 (1977), 211[CrossRef].
  28. J. F. C. Wardle, Nature 269 (1977), 563[CrossRef].
  29. M. E, Bailey and S. V. M. Clube, Nature 275 (1978), 278[CrossRef].

Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 63 No. 5 (1980) pp. 1551-1566 :
    Monte Carlo Simulation of Relativistic Comptonization
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  2. Progress of Theoretical Physics Vol. 64 No. 3 (1980) pp. 847-860 :
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  3. Progress of Theoretical Physics Vol. 65 No. 3 (1981) pp. 883-893 :
    Monte Carlo Simulation of the Unsaturated Comptonization in a Semi-Relativistic Plasma
    Fumio Takahara
  4. Progress of Theoretical Physics Vol. 66 No. 6 (1981) pp. 2038-2051 :
    General Relativistic Collapse of Rotating Supermassive Stars
    Takashi Nakamura and Humitaka Sato
  5. Progress of Theoretical Physics Vol. 68 No. 2 (1982) pp. 541-553 :
    Vertical Structure of a Magnetic Accretion Disk
    Ritoku Horiuchi
  6. Progress of Theoretical Physics Vol. 71 No. 2 (1984) pp. 295-308 :
    Non-Critical Solution of a Magnetic Accretion Disk
    Ritoku Horiuchi
  7. Progress of Theoretical Physics Supplement No.70 (1981) pp. 202-214 :
    Numerical Relativity
    Takashi Nakamura

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