Radiative Transfer in a Clumpy Medium - Part Two - the Mega-Grains Approximation for Two-Phase Models

Details Radiative Transfer in a Clumpy Medium - Part Two - the Mega-Grains Approximation for Two-Phase Models Radiative Transfer in a Clumpy Medium - Part Two - the Mega-Grains Approximation for Two-Phase Models

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.264..161h&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 264, NO. 1/SEP1, P. 161, 1993

Astronomy and Astrophysics

Astronomy

29

Radiative Transfer - Scattering - Ism: Clouds - Dust, Extinction

Scientific paper

An approximate method is presented for describing the transfer of radiation inside a two-phase medium. The medium is assumed to consist of spherical clumps, with uniform size and density, embedded in a more tenuous interclump medium. The transfer of radiation is modelled by treating the clumps as large grains, or `megagrains', with absorption and scattering coefficients calculable from the properties of the dust grains of which the clumps are composed. Numerical examples, for various two-phase slabs, show that radiation intensities calculated in this way agree closely with those found by modelling the density variations as a two-state Markov process.

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