A three-dimensional Monte Carlo photoionization code for modelling diffuse ionized gas

Kenneth Wood, John S Mathis, Barbara Ercolano

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

We have developed a three-dimensional Monte Carlo photoionization code tailored for the study of Galactic HII regions and the percolation of ionizing photons in diffuse ionized gas. We describe the code, our calculation of photoionization, heating and cooling, and the approximations we have employed for the low-density HII regions we wish to study. Our code gives results in agreement with the Lexington HII region benchmarks. We show an example of a two-dimensional shadowed region and point out the very significant effect that diffuse radiation produced by recombinations of He has on the temperature within the shadow.

Original languageEnglish
Pages (from-to)1337-1347
Number of pages11
JournalMonthly Notices of the Royal Astronomical Society
Volume348
Issue number4
DOIs
Publication statusPublished - 11 Mar 2004

Keywords

  • radiative transfer
  • HII regions
  • HELIUM-LIKE IONS
  • INTERSTELLAR-MEDIUM
  • DIELECTRONIC RECOMBINATION
  • HYDROGENIC IONS
  • RADIATIVE RECOMBINATION
  • LOW-TEMPERATURES
  • CROSS-SECTIONS
  • DISK GALAXIES
  • ATOMIC DATA
  • MILKY-WAY

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