Coronal-Line Forest AGN: the best view of the inner edge of the AGN torus?

We introduce Coronal-Line Forest active galactic nuclei (CLiF AGN), AGN which have a rich spectrum of forbidden high-ionization lines (FHILs, e.g. [Fe vii], [Fe x] and [Ne v]), as well as relatively strong narrow (∼300 km s−1) Hα emission when compared to the other Balmer transition lines. We find t...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2015-04, Vol.448 (3), p.2900-2920
Main Authors: Rose, Marvin, Elvis, Martin, Tadhunter, Clive N.
Format: Article
Language:English
Subjects:
Active galactic nuclei
Astronomy
Density
Dust
Emission
Emissions
Emittance
Forests
Ions
Kinematics
Photoionization
Stars & galaxies
Strength
Walls
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Summary:We introduce Coronal-Line Forest active galactic nuclei (CLiF AGN), AGN which have a rich spectrum of forbidden high-ionization lines (FHILs, e.g. [Fe vii], [Fe x] and [Ne v]), as well as relatively strong narrow (∼300 km s−1) Hα emission when compared to the other Balmer transition lines. We find that the kinematics of the CLiF emitting region are similar to those of the forbidden low-ionization emission-line (FLIL) region. We compare emission line strengths of both FHILs and FLILs to cloudy photoionization results and find that the CLiF emitting region has higher densities (104.5 
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stv113