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The nature of the relationship between the ionising processes of star formation and AGN accretion remains a mystery. In recent years, integral field spectroscopy (IFS) has greatly improved the study of star formation-AGN mixing within individual galaxies. Initial work in my PhD focused on improving upon the recent star formation-AGN mixing methods by introducing a theoretical method using photoionisation model grids. We show that the systematic effects associated with different models of the ionising stellar spectrum parameters in the model grids are small, and hence many choices of parameter model is sufficient to use in an H II region model grid. We demonstrate a new theoretical calculation of the AGN fraction in integral field unit (IFU) spaxels using data from the TYPHOON/PrISM survey, and also show the dependence of the AGN fraction calculation on the spatial resolution of the observations. Finally, we demonstrate a new three-dimensional diagnostic diagram, capable of separating the emission from the three ionising sources of star formation, shocks, and AGN simultaneously. We include comparisons to external data sets to strengthen our results. |
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