Physics
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004iaus..222..319f&link_type=abstract
The Interplay among Black Holes, Stars and ISM in Galactic Nuclei, Proceedings of IAU Symposium, No. 222. Edited by T. Storchi-B
Physics
1
Scientific paper
We use the photoionization code MAPPINGS Ic to model optical emission-line ratios of the extended emission-line regions of 24 Seyfert galaxies. Although most line ratios can be reproduced by varying the ionization parameter, gas density and/or the shape of the ionizing continuum, the ratio [NII]λλ6548,84/[OII]λ3727 can only be reproduced if we allow for a range of oxygen abundances of 0.5≤ (O/H)/(O/H)&sun; ≤ 3 for the whole sample. We propose a calibration to obtain (O/H) in terms of [NII]/[OII]. Also, in order to reproduce the emission-line spectra beyond 2 kpc from the nucleus, we had to introduce the contribution from hot stars to the ionizing spectra. We conclude that this is due to an increasing contribution of HII regions with distance from the nucleus to the emission-line regions.
Fraquelli Henrique A.
Storchi-Bergmann Thaisa
No associations
LandOfFree
Extended emission in Seyfert galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Extended emission in Seyfert galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extended emission in Seyfert galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1112998