Probing photoionization models in two well-studied extended emission-line regions - Centaurus A and 3C 227
The observed emission-line ratios of the extended emission-line regions of Cen A and 3C 227 are compared with the theoretical results from photoionization models, assuming a power-law spectrum for the nuclear ionizing radiation. We show that a variation of the optical depth of the emitting gas can mimic a variation of the ionization parameter. Most
Viegas, Sueli M. et al.
Fecha de publicación:
10
1992