The extended narrow line region of NGC 4151. I - Emission line ratios and their implications
The paper presents the first results from long-slit spectra of the Seyfert galaxy NGC 4151 which give average diagnostic ratios of weak lines in the Extended Narrow Line Region (ENLR) of the galaxy and the first direct density measurement in an ENLR. These data confirm that the ENLR is kinematically undisturbed gas in the disk of the galaxy which
Penston, M. V. et al.
Fecha de publicación:
9
1990