Spectral formation in x-ray pulsars and associated identities involving the Laguerre polynomials

Details Spectral formation in x-ray pulsars and associated identities involving the Laguerre polynomials Spectral formation in x-ray pulsars and associated identities involving the Laguerre polynomials

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jmp....49c3506b&link_type=abstract

Journal of Mathematical Physics, Volume 49, Issue 3, pp. 033506-033506-12 (2008).

Mathematics

Mathematical Physics

X-Ray Binaries, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification

Scientific paper

The partial differential equation governing the formation of the radiation spectrum in the shocked plasma accreting onto an x-ray pulsar is solved to obtain the associated Green's function describing the scattering of monochromatic radiation injected into the plasma at a fixed altitude above the star. Collisions between the photons and the infalling electrons cause both the ordered and random components of the plasma energy to be transferred to the radiation, which escapes by diffusing through the walls of the accretion column. The analytical solution for the Green's function provides important physical insight into the formation of the observed spectra in x-ray pulsars. Interesting mathematical aspects of the problem include the establishment of a new summation formula involving the Laguerre polynomials, based on the calculation of the photon number density via integration of Green's function.

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