A momentum distribution of high energy particles around Crab pulsar |
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| Authors: | Satoshi Hinata |
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| Institution: | (1) Dept. of Astronomy, Yale University, New Haven, Conn., USA |
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| Abstract: | We determine the momentum distribution of the relativistic particles near the Crab pulsar from the observed X- and  -ray spectra (103 109 eV), provided that the curvature radiation is responsible for it. The power law spectrum for the relativistic electrons,f()
–5, reproduces a close fit to the observed high-energy photon spectrum. The theoretically determined upper limit to the momentum (due to radiation damping),
M
 8×106, corresponds to the upper cut-off energy of the -ray spectrum,  109 eV. The lower limit to the momentum,
m
1.8×105, is chosen such that flattening of the X-ray spectrum below 10 keV is simulated. The number density of these electrons is found to be much higher than the Goldreich-Julian density. We also discuss pulse shape and polarization of high-energy photons. The extremely high density of particles and the steep momentum spectrum are difficult to understand. This may imply that another, more efficient, mechanism is in operation. |
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