525 citations · 2.9k across the 29 of their papers we have counts for
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Abundance scaling in stars, nebulae and galaxies
David C. Nicholls, Ralph S. Sutherland, Michael A. Dopita +2
We present a new basis for scaling abundances with total metallicity in nebular photoionisation models, based on extensive Milky Way stellar abundance data, to replace the uniform…
The Discovery of Raman Scattering in HII Regions
Michael A. Dopita, David C. Nicholls, Ralph S. Sutherland +2
We report here on the discovery of faint extended wings of Hα observed out to an apparent velocity of ~ 7600 km/s in the Orion Nebula (M42) and in five HII regions in the Large and…
Chemical abundances in high-redshift galaxies: A powerful new emission line diagnostic
Michael A. Dopita, Lisa J. Kewley, Ralph S. Sutherland +1
This Letter presents a new, remarkably simple diagnostic specifically designed to derive chemical abundances for high redshift galaxies. It uses only the H α, [N II] and [S II] emi…