An Approximation of Chandrasekhar's H-Function for Conservative Isotropic Scattering

Details An Approximation of Chandrasekhar's H-Function for Conservative Isotropic Scattering An Approximation of Chandrasekhar's H-Function for Conservative Isotropic Scattering

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...227..649h&link_type=abstract

Astronomy and Astrophysics, Vol. 227, NO. 2/JAN(II), P. 649, 1990

Astronomy and Astrophysics

Astrophysics

Radiation Transfer, Numerical Methods

Scientific paper

A new high accuracy approximation to Chandrasekhar's H-function for conservative isotropic scattering is derived by expanding H(x) into shifted Legendre polynomials and then substituting this expansion into the integral equation for the H-function. The approximation of degree three for the conservative isotropic case is given explicitly, where all four coefficients can be expressed in closed form. Comparison with previous approximations is presented.

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