Incorporation of density fluctuations into photoionization calculations

Details Incorporation of density fluctuations into photoionization calculations Incorporation of density fluctuations into photoionization calculations

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...392...99w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 392, no. 1, June 10, 1992, p. 99-105.

Astronomy and Astrophysics

Astrophysics

16

Density (Mass/Volume), Photoionization, Radiative Transfer, Forbidden Transitions, Interstellar Gas, Novae, Optical Thickness, Ultraviolet Radiation

Scientific paper

The paper presents a method whereby a distribution of density inhomogeneities can be incorporated into photoionization calculations. Emission line fluxes are computed by transforming the standard emissivity volume integral into an integral over density, utilizing the filling factor. Applied to nova, it is shown that the density above which condensations become neutral remains constant in time during the early expansion, and that a considerable fraction of the ejecta is shadowed from the central ionizing source.

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