525 citations · 2.9k across the 29 of their papers we have counts for
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Nebular metallicities in two isolated Local Void dwarf galaxies
David C. Nicholls, Helmut Jerjen, Michael A. Dopita +1
Isolated dwarf galaxies, especially those situated in voids, may provide insight into primordial conditions in the Universe and the physical processes that govern star formation in…
New Strong Line Abundance Diagnostics for \HII Regions: Effects of -Distributed Electron Energies and New Atomic Data
Michael A. Dopita, Ralph S. Sutherland, David C. Nicholls +2
Recently, \citet{Nicholls12}, inspired by \emph{in situ} observations of solar system astrophysical plasmas, suggested that the electrons in \HII regions are characterised by a …
Measuring nebular temperatures: the effect of new collision strengths with equilibrium and kappa-distributed electron energies
David C. Nicholls, Michael A. Dopita, Ralph S. Sutherland +2
In this paper we develop tools for observers to use when analysing nebular spectra for temperatures and metallicities, with two goals: to present a new, simple method to calculate…