446 citations · 2k across the 32 of their papers we have counts for
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astro-ph2006★ 73 cited
He~I Emission in the Orion Nebula and Implications for Primordial Helium Abundance
R. L. Porter, G. J. Ferland, K. B. MacAdam
We apply a recently developed theoretical model of helium emission to observations of both the Orion Nebula and a sample of extragalactic H II regions. In the Orion analysis, we el…
astro-ph2006★ 25 cited
A Cloudy/Xspec Interface
R. L. Porter, G. J. Ferland, S. B. Kraemer +3
We discuss new functionality of the spectral simulation code CLOUDY which allows the user to calculate grids with one or more initial parameters varied and formats the predicted sp…