Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26at...21...37s&link_type=abstract
Astronomical and Astrophysical Transactions, vol. 21, Issue 1, p.37-40
Astronomy and Astrophysics
Astrophysics
Scientific paper
Usually radioemission from a compact source is considered as a radiation of the pulsar, and the observed spectrum is joined. In the model of radioemission presented here the frequency spectrum of a compact source and a pulsar described separately. The observed spectrum is a superposition of independent spectra of a compact source and a pulsar, with the indices alpha_c=2.09 and alpha_p=3.5. The pulsar spectrum continues to high frequencies beyond 100 MHz, with a cutoff at lower frequencies. The pressure of magnetic dipole radiation from a rotating pulsar with Omega=33 Hz sweeps up the plasma from the cavity around pulsar. The size of the cavity determines the size of the compact source, which have brightness temperature above 10^{12} K, and negligible reabsorbtion. Therefore radiating particles must be relativistic protons. The photons of the magnetic dipole radiation scatter on these protons, and trough inverse Compton effect their frequencies grow significantly. Compton radiation is observed as a radiation of the compact source. The radiating protons must have energies 10^{11} lt Elt 2times 10^{12} eV.
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