Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974apj...194..165l&link_type=abstract
Astrophysical Journal, vol. 194, Nov. 15, 1974, pt. 1, p. 165-175.
Astronomy and Astrophysics
Astrophysics
8
Earth Magnetosphere, Pulsars, Radiant Flux Density, Radiative Transfer, Ray Tracing, Stellar Atmospheres, Emissivity, Group Velocity, Neutron Stars, Refractivity, Shear Properties, Wentzel-Kramer-Brillouin Method
Scientific paper
We give a detailed discussion of the group-velocity ray paths in a plane differentially sheared medium with constant index of refraction as measured by a local inertial observer. For a given velocity profile the numerical ray paths are presented graphically for several representative cases. Assuming that the medium has a volume emissivity and that a given flux of radiation is incident at the base of the medium, the flux of radiation leaving the slab as a function of exit angle is calculated and presented in the same representative cases. Peaks and discontinuities in the flux generally appear at given exit angles, but their locations and the half-widths of the peaks depend sensitively on the index of refraction.
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