124 citations · 355 across the 11 of their papers we have counts for
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astro-ph.GA2012★ 31 cited
Pumping up the [N I] nebular lines
G. J. Ferland, W. J. Henney, C. R. O'Dell +3
The optical [N I] doublet near 5200 Å is anomalously strong in a variety of emission-line objects. We compute a detailed photoionization model and use it to show that pumping by fa…
astro-ph.CO2012★ 11 cited
Hydrogen Two-Photon Continuum Emission from the Horseshoe Filament in NGC 1275
R. M. Johnstone, R. E. A. Canning, A. C. Fabian +5
Far ultraviolet emission has been detected from a knot of Halpha emission in the Horseshoe filament, far out in the NGC 1275 nebula. The flux detected relative to the brightness of…