Diffuse radiation in models of photoionized nebulae

Details Diffuse radiation in models of photoionized nebulae Diffuse radiation in models of photoionized nebulae

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...336..301o&link_type=abstract

Astronomy and Astrophysics, v.336, p.301-308 (1998)

Astronomy and Astrophysics

Astrophysics

20

Ism: H Ii Regions, Radiative Transfer, Atomic Processes, Methods: Numerical

Scientific paper

This paper is the first in a series from a study of inhomogeneous gaseous nebulae, which has at its focus the apparent discrepancy between various observational aspects of real H ii regions and theoretical predictions such as emission line ratios from low and high ionization species, details of the temperature structure and chemical abundance determination schemes. It is shown that the key problem is the detailed treatment of the radiation transport in an inhomogeneous and non-isotropic medium. We use a Monte Carlo technique, a proven means to handle complex radiation transport situations, to create photoionization models which are free of approximations concerning the radiative transfer. The code is tested for 1D homogeneous cases against the results from established photoionization codes, reaffirming its applicability to highly structured and non-symmetric nebulae.

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