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|Title:||Generalised eddington approximation for radiative transfer problems in spherically-symmetric moving media||Authors:||Sen, K.K.
|Issue Date:||May-1993||Citation:||Sen, K.K., Wilson, S.J. (1993-05). Generalised eddington approximation for radiative transfer problems in spherically-symmetric moving media. Astrophysics and Space Science 203 (2) : 227-240. ScholarBank@NUS Repository. https://doi.org/10.1007/BF00658991||Abstract:||A moment method with three stream division of the radiation field was suggested by Wilson, Wan and Sen (1980) for solving radiative transfer problems in stationary, non-grey extended shells surrounding a central star. Use was made of the generalised Eddington relations as the closure conditions of the moment equations. In the present paper the same method has been utilised to study the radiative transfer problems in a non-grey, expanding gaseous spherical shells surrounding a central star. The transfer equation has been set in comoving frame in spherical geometry. The radiation and material quantities, angles and frequencies have been expressed in comoving frame. The mean intensity, flux and K-integrals have been calculated for extensive atmospheres in the presence of different velocity fields. © 1993 Kluwer Academic Publishers.||Source Title:||Astrophysics and Space Science||URI:||http://scholarbank.nus.edu.sg/handle/10635/103322||ISSN:||0004640X||DOI:||10.1007/BF00658991|
|Appears in Collections:||Staff Publications|
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