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On X-ray Pulsar Radiation Mechanisms

Published online by Cambridge University Press:  14 August 2015

V. V. Zheleznyakov
V. V. Zheleznyakov*
Affiliation:
Institute of Applied Physics, Gorky, USSR

Extract

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In this report we shall discuss the origin of radiation from the neutron star component of X-ray binary systems whose spectra contain cyclotron lines (Her X-1 and 4U0115+63). A relevant model of the polar region of a neutron star is presented in Figure 1. According to this model the observed X-rays (continuum + cyclotron lines) are generated in the dense plasma atmosphere of a star (in its hot spot heated by accreting matter). The problem of heating the neutron star atmosphere due to accretion has been earlier investigated by Zeldovich and Shakura (1969). Cyclotron lines are formed similarly to the Fraunhofer spectrum of ordinary stars and are absorption lines. For objects such as Her X-1 and 4U0115+63 the cyclotron emission and absorption in the extended accreting column with an inhomogeneous magnetic field should be unessential. Otherwise the accreting column will produce an X-ray continuum devoid of any line type features.

Type
V. X-Ray and γ-Ray Emission
Information
Symposium - International Astronomical Union , Volume 95: Pulsars , 1981 , pp. 255 - 261
Copyright
Copyright © Reidel 1981 

References

Basko, M.M. and Sunyaev, R.A.: 1975, Astron. Astrophys. 42, p. 311.Google Scholar
Gnedin, Yu.N. and Sunyaev, R.A.: 1974, Astron. Astrophys. 36, p. 379.Google Scholar
Helfand, D.J., Chanan, G.A., and Novick, R.: 1980, Nature 283, p. 337.CrossRefGoogle Scholar
Melrose, D.B. and Zheleznyakov, V.V.: 1980, Astron. Astrophys. (to be published).Google Scholar
Trümper, J.: 1978, “Her X-1 cyclotron lines”, IAU/COSPAR Symposium on X-ray Astronomy (Innsbruck, June 1978).Google Scholar
Trümper, J., Pietsch, W., Reppin, C., Voges, W., Staubert, R., and Kendziorra, E.: 1978, Astrophys. J. Letters 219, p. L105.CrossRefGoogle Scholar
Wheaton, W.A. et al.: 1979, Nature 282, p. 240.Google Scholar
Zel'dovich, Ya.B. and Shakura, N.I.: 1969, Astron. J. USSR 46, p. 225.Google Scholar
Zheleznyakov, V.V.: 1981, Astrophys. Space Sci. 77, 279.CrossRefGoogle Scholar