Observations and modeling of diffuse ionized gas in edge-on galaxies

Details Observations and modeling of diffuse ionized gas in edge-on galaxies Observations and modeling of diffuse ionized gas in edge-on galaxies

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002phdt........20t&link_type=abstract

PhD Thesis, Bochum: Ruhr-Universitaet, 2002

Computer Science

4

Ionized Gases, Ionization, Interstellar Matter

Scientific paper

The present PhD theses deals with observations of diffuse ionized gas (DIG) in edge-on galaxies and their corresponding modeling. A still unexplained issue concerns possible ionization mechanisms of the DIG. Based upon energy estimations photoionization by young O stars appears to be the most likely ionizing source. Within the scope of this work, spectroscopic line ratios have been obtained which are compared to predictions of common photoionization models. As these codes cannot explain the observational data consistently, a new photoionization model code has been developed which is based on Monte Carlo techniques and assumes a more realistic geometry. First model iterations of the ionization structure of the DIG reveal encouraging results. In order to simulate individual galaxies in detail, a comprehensive investigation of the free parameter space is required.

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