Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-01-09
Astrophys.J. 611 (2004) 81-92
Astronomy and Astrophysics
Astrophysics
30 pages, 11 eps figures Submitted to ApJ
Scientific paper
10.1086/422027
We present theoretical iron emission line strengths for physical conditions typical of Active Galactic Nuclei with Broad-Line Regions. The non-local thermodynamic equilibrium (NLTE) models include a new and extensive treatment of radiative transfer in the FeIII ion, complementing the FeII emission line strengths predicted in our earlier works. We also briefly present preliminary results for the FeI emission from AGN using a reduced atom model. We can satisfactorily reproduce the empirical UV FeIII emission line template of Vestergaard & Wilkes (2001) for the prototypical narrow-line Seyfert 1 galaxy I Zw 1, both in terms of the general FeIII flux distribution and the relative strength of the FeIII and FeII emission. However, a number of detailed features are still not matched; the most prominent example is the strongest single FeIII feature observed in the I Zw 1 spectrum, UV47: it is predicted to be strong only in models suppressing Fe-H charge exchange reactions. We examine the role of variations in cloud turbulent velocity and iron abundance and carry out Monte Carlo simulations to demonstrate the effect of uncertainties in atomic data on the computed spectra.
Nahar Sultana N.
Pradhan Anil Kumar
Sigut T. A. A.
No associations
LandOfFree
Theoretical FeI/II/III Emission-Line Strengths from Active Galactic Nuclei with Broad-Line Regions 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 Theoretical FeI/II/III Emission-Line Strengths from Active Galactic Nuclei with Broad-Line Regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Theoretical FeI/II/III Emission-Line Strengths from Active Galactic Nuclei with Broad-Line Regions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-688390