Abstract
The absorption coefficients for extraordinary and ordinary electromagnetic modes are found for a tenuous hot magnetized plasma, taking into account the collisions between plasma particles and the scattering of photons. An approach is suggested which generalizes ‘collisionless’ and ‘cold-plasma’ approximations. The simple formulae obtained are valid both near, and at a distance from, the cyclotron harmonics. In particular, the ordinary mode is shown to have resonance at the cyclotron frequency. The number of noticeable reasonances of absorption coefficient at cyclotron harmonics is estimated for both modes.
Using the coefficients obtained, the intensity, Stokes parameters and polarization of radiation of a homogeneous plasma slab are calculated for conditions which may be realized in the heated regions of accreted plasma in an AM Herculis-type system. The large difference between the absorption coefficient of extra-ordinary and ordinary modes near the cyclotron harmonics may result in the emission of the broad polarized continuum together with the narrow cyclotron lines. The polarization of these lines has a complicated spectral dependence.
The results obtained are shown to be useful for explaining the main properties of AM Herculistype objects.
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References
Akhiezer, A. I., Akhiezer, I. A., Polovin, R. V., Sitenko, A. G. and Stepanov, K. N.: 1975,Plasma Electrodynamics, Pergamon, Oxford.
Bekefi, G.: 1966,Radiation Processes in Plasma, Wiley & Sons.
Chanmugam, G. and Wagner, R. L.: 1979,Astrophys. J. 232, 895.
Ginzburg, V. L.: 1964,The Propagation of Electromagnetic Waves in a Plasma, Pergamon Press, Oxford.
Fabian, A., Pringle, J. K. and Rees, M.: 1976,Monthly Notices Roy. Astron. Soc. 173, 43.
Gnedin, Yu. N. and Pavlov, G. G.: 1973,Zh. Eksper. Teor. Fiz. 65, 1806 (Sov. Phys. JETP 38, 903).
Gnedin, Yu. N. and Sunayev, R. A.: 1974,Astron. Astrophys. 36, 379.
Lamb, D. Q. and Masters, A. R.: 1979,Astrophys. J. 234, L117.
Liebert, J., Stockman, H. S., Angel, J. R. P., Wolf, N. J., Hege, K. and Margon, B.: 1978,Astrophys. J. 225, 201.
Liebert, J., Stockman, H. S., Angel, J. R. P., Margon, B.: 1979 (private communication).
Masters, A. R., Pringle, J. E., Fabian, A. C. and Rees, M. G.: 1977,Monthly Notices Roy. Astron. Soc. 178, 501.
Mitrofanov, I. G.: 1979, Report inIAU Symp. 88.
Mitrofanov, I. G.: 1980,Nature 283, 176.
Pavlov, G. G. and Panov, A. N.: 1976,Zh. Eksper. Teor. Fiz. 71, 572 (Sov. Phys. JETP 44, 300).
Pavlov, G. G. and Shivanov, Yu. A.: 1978,Astron. Zh. 55 373.
Pavlov, G. G. and Shivanov, Yu. A.: 1979,Zh. Eksper. Teor. Fiz. 76, 1457.
Pavlov, G. G. and Shivanov, Yu. A. and Gnedin, Yu. N.: 1979,Pis' ma Zh. Eksper. Teor. Fiz. 30, 137.
Pavlov, G. G., Shivanov, Yu. A. and Yakovlev, D. G.: 1980,Astrophys. Space Sci. 73, 33.
Shafranov, V. D.: 1967, in M. A. Leontovich (ed.),Reviews of Plasma Physics, Vol. 3, Consultants Bureau, New York.
Tapia, S.: 1977,Astrophys. J. 212, L125.
Trümper, J., Pietsch, W., Reppin, G., Voges W. Staubert R. and Kendziorra E. 1978,Astrophys. J. 219, L105.
Voykhanskaya, N. F. and Mitrofanov, I. G.: 1980,Pis'ma Astron. Zh. 6, 159.
Weaton, W.: 1978,IAU Circ. 3238.
Wickramasinghe, D. T. and Visvanathan, N.: 1979, Report inIAU Symp. 88.
Zheleznyakov, V. V.: 1970,Radio Emission of the Sun and Planets, Pergamon Press, Oxford.
Zheleznyakov, V. V.: 1977,Electromagnetic Waves in Cosmic Plasma (in Russian), Nauka, Moscow.
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Pavlov, G.G., Mitrofanov, I.G. & Shibanov, Y.A. The radiation of a hot magnetized plasma accreted by degenerate stars with a strong magnetic field. Astrophys Space Sci 73, 63–82 (1980). https://doi.org/10.1007/BF00642367
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DOI: https://doi.org/10.1007/BF00642367