A Model for Type 2 Coronal Line Forest (CLiF) AGNs
2016
We present a model for the classification of Coronal Line Forest Active Galactic Nuclei (CLiF AGNs). CLiF
AGNs are of special interest due to their remarkably large number of emission lines, especially forbidden highionization
lines (FHILs). Rose et al. suggest that their emission is dominated by reflection from the inner wall of
the obscuring region rather than direct emission from the accretion disk. This makes CLiF AGNs laboratories to
test AGN-torus models. Modeling an AGN as an accreting supermassive black hole surrounded by a cylinder of
dust and gas, we show a relationship between the viewing angle and the revealed area of the inner wall. From the
revealed area, we can determine the amount of FHIL emission at various angles. We calculate the strength of
[Fe VII]λ6087 emission for a number of intermediate angles (30°, 40°, and 50°) and compare the results with the
luminosity of the observed emission line from six known CLiF AGNs. We find that there is good agreement
between our model and the observational results. The model also enables us to determine the relationship between
the type 2:type 1 AGN fraction vs the ratio of torus height to radius, h/r.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
48
References
10
Citations
NaN
KQI