Tag Archives: collisionally excited lines

The abundance discrepancy factor and t^2 in nebulae: are non-thermal electrons the culprits?

Ferland, G. J.; Henney, W. J.; ODell, C. R.; Peimbert, M. (1) Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506, USA. (2) Centro de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México, Apartado Postal 3-72, 58090 Morelia, Michoacán, México. (3) Department of Physics and … Continue reading

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On the RL/CEL discrepancy

Grazyna Stasinska Grazyna Stasinska (LUTH, Observatoire de Paris, Meudon, France) The discrepancy between abundances derived from collisionally excited lines (CEL) and recombination lines (RL) in  H II regions and planetary nebulae is still not fully understood. As I understand, the effective recombination rates … Continue reading

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