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Calibration of the H II region abundance sequence and abundances in Seyfert galaxies

Evans, Ian Nigel


An extensive, homogeneous grid of theoretical photoionization models with conditions appropriate to observed H n regions is computed. This grid is used to develop a comprehensive set of theoretical diagnostic diagram s for H ii regions which employ ratios of prom inentemission lines to determine the ionization parameter within the nebula, and the ionization temperature of its exciting star(s). It is also possible to estimate the element-averaged m etallicity in the nebula and stars from...[Show more]

CollectionsOpen Access Theses
Date published: 1986
Type: Thesis (PhD)
DOI: 10.25911/5d6f9f758122c


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