Physical conditions derived from O II recombination lines in planetary nebulae and their implications
Based on high quality observations of multiplet V1 of O II and the NLTE atomic computations for O II we study the density and temperature of a sample of PNe. We find that, in general, the densities derived from recombination lines of O II are similar to the densities derived from forbidden lines. This implies that the signature for oxygen rich
Peimbert, A. et al.
Fecha de publicación:
10
2014