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Mechanism of regular acceleration and evolution of supernova remnants

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Abstract

The possibility of realization of a mechanism of regular acceleration of charged particles at the shock front in shell-type supernova remnants (SNR) is demonstrated. In the framework of this mechanism, in order to satisfy the observed fact that there is no separation of SNR emissivity by spectral indices α, it is necessary that the value ϕeψ αe (where ϕe is the fraction of particles injected into the mechanism and ψe is the threshold energy of injection) should be a strongly increasing function of α. The shape of this function is obtained by using calibration objects with independently estimated magnetic fields, and its behaviour with respect to the evolution of SNRs is investigated.

The magnetic field values estimated for the chosen SNRs with the aid of this function are close to their minimum values if one ignores the proton component of relativistic particles. The ratio of magnetic field energy density to the kinetic energy density increases with the increase of the SNR diameter.

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Authors and Affiliations

  1. Institute of Physics, Academy of Sciences, Azerbaijan SSR, Baku, U.S.S.R.

    A. O. Allakhverdiyev, A. I. Asvarov, O. H. Guseinov & F. K. Kasumov

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  1. A. O. Allakhverdiyev
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  2. A. I. Asvarov
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  3. O. H. Guseinov
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  4. F. K. Kasumov
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Allakhverdiyev, A.O., Asvarov, A.I., Guseinov, O.H. et al. Mechanism of regular acceleration and evolution of supernova remnants. Astrophys Space Sci 123, 237–258 (1986). https://doi.org/10.1007/BF00653946

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  • DOI: https://doi.org/10.1007/BF00653946

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