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Calibrating Nebular Diagnostics of T and Abundance

Oey, M; Smith, R. Chris; Shields, John; Dopita, Michael


We obtained nebular spectroscopy of LMC H II regions having classified stellar populations, thereby strongly constraining the ionization input parameters. Using photoionization models, we then evaluate the performance of nebular diagnostics of T* and abundance. We introduce [Ne III]/Hβ as a nebular diagnostic of the ionizing stellar T*. In contrast to the widely-used η1 parameter, [Ne III]/Hβ has greater sensitivity to mid and early O-stars, and is robust to nebular morphology and the presence...[Show more]

CollectionsANU Research Publications
Date published: 2002
Type: Journal article
Source: Revista Mexicana de Astronomia y Astrofisica


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