Diffuse continuum transfer in H II regions

TL;DR

This paper evaluates different methods for modeling diffuse Lyman continuum transfer in H II regions, aiming to improve accuracy in multidimensional simulations without complex transport calculations.

Contribution

It compares various transfer methods against high-resolution integration and suggests efficient approaches for multidimensional dynamical simulations.

Findings

Diffuse field angular distribution insights

Assessment of transfer method accuracy

Guidelines for simplified diffuse field treatment

Abstract

We compare the accuracy of various methods for determining the transfer of the diffuse Lyman continuum in HII regions, by comparing them with a high-resolution discrete-ordinate integration. We use these results to suggest how, in multidimensional dynamical simulations, the diffuse field may be treated with acceptable accuracy without requiring detailed transport solutions. The angular distribution of the diffuse field derived from the numerical integration provides insight into the likely effects of the diffuse field for various material distributions.