Soft X-Ray Production by Photon Scattering from an Accreting Neutron Stars
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Date
2007-07
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Addis Ababa University
Abstract
We have calculated Compton scattering in strong magnetic fields and obtained a
full expression of the scattering cross-section( ) of a particle, or the total area of the
scatterer as seen by the incident photons. This Scattering Cross-section is valid only
for the scattering of a low-frequency photon with non-relativistic electrons. We have
made a plot of scattering cross-section versus incident photon frequency and tried to
see the relationship the two parameters have got with respect to each other. The
comparison of the incident and the scattered photon frequencies and the relationship
between the two is also shown. That is, we have tried to show that as our mechanism
of soft x-ray production is compton scattering, the photon frequency after scattering
is less than its incident value. This tells us the fact that low photon frequencies are
obtained and this inturn implies the production of soft X-rays at the surface of the
neutron stars. Therefore, there exists a mechanism as a source of soft(Es < 10kev)
radiation in binary neutron stars, in the form of photon scattering with both the
initial and final electrons on the ground magnetic states. This mechanism provides
a copious source of soft photons which can be redistributed to higher frequencies by
inverse Comptonization
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Soft X-Ray Production by Photon Scattering