Other
Scientific paper
Sep 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apjs...35...31w&link_type=abstract
Astrophysical Journal Supplement Series, vol. 35, Sept. 1977, p. 31-36.
Other
17
Interstellar Matter, Light Scattering, Nebulae, Optical Reflection, Radiative Transfer, Albedo, Monte Carlo Method, Optical Thickness, Photons
Scientific paper
The characteristics of higher order scattering in plane-parallel reflection nebulae of finite optical thickness have been examined. Measured both by the mean number of scatterings and the effective multiplicity, the importance of multiple scattering in such systems varies strongly with position as well as direction, and the effects cannot be taken into account by simple corrections only. It is found that the amount of higher order scattering is relatively insensitive to the shape of the phase function over a wide range of asymmetries, while the dependence of multiplicity on particle albedo, optical thickness of the nebula, and other geometrical factors is as expected. Pronounced asymmetries in the surface brightness distribution of strongly tilted plane-parallel nebulae are explained by different radial variations of the effective multiplicity along opposite radii on the projected nebular face.
Oshel E. R.
Witt Adolf N.
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